CN105089592B

CN105089592B - Chemical Self-heating system injection technology and injection device in thick oil reservoir

Info

Publication number: CN105089592B
Application number: CN201510420011.XA
Authority: CN
Inventors: 吴飞鹏; 刘静; 蒲春生; 赵青; 黄小梅
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2015-07-17
Filing date: 2015-07-17
Publication date: 2017-07-28
Anticipated expiration: 2035-07-17
Also published as: CN105089592A

Abstract

The invention discloses chemical Self-heating system injection technology in a kind of thick oil reservoir, when being injected using the cold mode of adopting, process is as follows：Heat generating agent slug, spacer slug, triggering agent slug, displacement fluid slug, closing well and opening well and making production；When being injected using heat extraction by steam injection mode, process is as follows：Steam preheating slug, heat generating agent slug, spacer slug, triggering agent slug, displacement fluid slug, stewing well and opening well and making production, the processing step is simple, reasonable in design, easy to operate and injection process is safe and reliable, using effect is good, easy can complete the injection process of chemical Self-heating system in thick oil reservoir；And, the invention also discloses chemical Self-heating system injection device in a kind of thick oil reservoir, the liquid injection pipe being connected including four apparatus for combining liquids and one with the pit shaft of target well, plunger pump, pressure sensing cell and the 5th check valve are housed on liquid injection pipe, the device structure is simple, reasonable in design and pipeline is easy to connect, using easy to operate, and using effect is good.

Description

Chemical Self-heating system injection technology and injection device in thick oil reservoir

Technical field

The invention belongs to the Technology of Heavy Oil Recovery field, injected more particularly, to chemical Self-heating system in a kind of thick oil reservoir Technique and injection device.

Background technology

Viscous crude aboundresources, development significance are great, and a distinguishing feature of heavy crude reservoir is viscous crude under formation conditions Viscosity is high, relatively denser and fluid ability is poor, thus is difficult to economy with routine techniques, effectively develops.But the viscosity of viscous crude Very sensitive to temperature, i.e. the viscosity of temperature rise viscous crude is greatly lowered, and viscosity is higher, and the amplitude of decline is bigger, this When viscous crude flow when tend to Newtonian fluid, this is the important thermophysical property of viscous crude, is also the basic foundation of oil recovery by heating.It is super thick Oil refers to that viscosity of thickened oil is more than the oil of 50000 (mPas) mpas.

At present, the main exploitation means with steam soak as viscous crude are driven using steam both at home and abroad, for heavy oil exploitation via steam injection The problem of effective radius of influence present in process is too small, with reference to space flight navigational field high heat density fuel technology, propose to Under-effected formation at target locations injection chemical heat-generating agent (the also referred to as chemical spontaneous hot system or heat-generating agents) auxiliary of steam Temperature raising is theoretical, by spontaneous thermal response precision Control Technology in the injection technology optimization layer of stable safety, and optimizes and steam injection And its supporting technology of other heavy crude heat extraction means such as hydrothermal cracking, there is Self-heating in layer under the conditions of steam injection anti-to realize Should, ground layer for heating radius is effectively increased, promotes the exploitation effect of the heavy crude heat extraction technology such as steam soak or hydrothermal cracking.Now such as The present, the relatively broad chemical spontaneous hot system of field use has nitrite and ammonium salt heat system, H₂O₂Heat system, polyhydroxy The oxidation of aldehydes heat system of base and active metal heat system, heat system in active metal preferably, is relatively adapted to from exothermic energy Spontaneous heat demand in viscous crude super-viscous oil layer.Active metal heating element owner will include heat generating agent and triggering agent, wherein heat generating agent For active metal, such as aluminium, magnesium.Because active metal heat system is related to the dangerous material such as active metal particle, highly basic, it is necessary to tight Lattice are injected by many slugs, and existing conventional injection device and injection technology realize difficulty, and complex operation, danger coefficient It is high.

The content of the invention

In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of thick oil reservoir Interior chemical Self-heating system injection technology, its processing step is simple, reasonable in design and easy to operate, using effect is good, can be easy The injection process of chemical Self-heating system in thick oil reservoir is completed, injection process is safe and reliable, injects chemical spontaneous hot system Heat efficiency high and temperature raising effect is good.

In order to solve the above technical problems, the technical solution adopted by the present invention is：Chemical Self-heating body in a kind of thick oil reservoir It is injection technology, it is characterised in that：Injected using cold adopt residing for mode or heat extraction by steam injection mode to target well in thick oil reservoir The spontaneous hot system of chemistry；The chemical spontaneous hot system includes heat generating agent and triggering agent and it is alkaline spontaneous hot system or acidity Spontaneous hot system, the heat generating agent is not more than the work ripple metallic particles of 400 mesh and for wrapping up ripple metallic particles living including granularity Clad；The work ripple metallic particles of the alkaline spontaneous hot system is aluminium powder, and the clad for wrapping up aluminium powder is paraffin bag Coating or aluminum stearate clad, the triggering agent of the alkaline spontaneous hot system is NaOH powder, the matter of aluminium powder and NaOH powder Amount is than being 1 ︰ (1.0~2.5)；The work ripple metallic particles of the acid spontaneous hot system is magnesium powder, the cladding for wrapping up magnesium powder Layer is paraffin clad or magnesium stearate clad, and the triggering agent of the acid spontaneous hot system is P₂O₅Powder, magnesium powder and P₂O₅ The mass ratio of powder is 1 ︰ (1.0~2.0)；Inject before the chemical spontaneous hot system, first viscous crude is stored up according to residing for target well The acid-base property of layer, the type to injected chemical spontaneous hot system is determined：When thick oil reservoir residing for target well is acidity, Chemical spontaneous hot system is injected for alkaline spontaneous hot system；When thick oil reservoir residing for target well is alkalescence, chemistry is injected Spontaneous hot system is acid spontaneous hot system；

Wherein, using it is cold adopt inject chemical spontaneous hot system in thick oil reservoir residing for mode to target well when, process is as follows：

Step 101, heat generating agent slug：The heat generating agent suspension prepared in advance is injected into thick oil reservoir residing for target well It is interior；

During the heat generating agent suspension is the suspension that is uniformly mixed to form by heat generating agent and water, the heat generating agent suspension The mass percent concentration of heat generating agent is 28%~35%；The injection rate of heat generating agent suspension viscous crude according to residing for target well Reservoir temperature lifting institute calorific requirement is determined；

Step 102, spacer slug：The insulating liquid prepared in advance is injected residing for target well in thick oil reservoir；

The injection rate of the insulating liquid is the 35%~40% of the wellbore volume of target well；

Step 103, triggering agent slug：The triggering agent solution prepared in advance is injected residing for target well in thick oil reservoir, The triggering agent solution is the quality hundred of triggering agent in the solution being uniformly mixed to form by triggering agent and water, the triggering agent solution Specific concentration is divided to be not less than 40%；

Injection rate injection rate of heat generating agent suspension according to step 101, the heat of the triggering agent solution Matter of the ripple metallic particles living with triggering agent in the mass percent concentration of heat generating agent, the chemical spontaneous hot system in agent suspension Measure and be determined than the mass percent concentration with triggering agent in the triggering agent solution；

Step 104, displacement fluid slug：The displacement fluid prepared in advance is injected residing for target well in thick oil reservoir；

The injection rate of the displacement fluid is the 60%~65% of the wellbore volume of target well；

Insulating liquid is aqueous surfactant solution described in the displacement fluid and step 102, the surfactant water The mass concentration of surfactant is 0.12%~0.18% in solution；

Step 105, closing well：By target well closing well 60h~80h；

Step 106, opening well and making production；

During using injecting chemical spontaneous hot system in thick oil reservoir residing for heat extraction by steam injection mode to target well, process is such as Under：

Step 201, steam preheating slug：To 280 tons~320 tons steam are injected residing for target well in thick oil reservoir, to mesh Thick oil reservoir residing for mark well is preheated；

Step 202, according to the method described in step 101 to step 104, by elder generation to rear completion heat generating agent slug, isolation Liquid slug, triggering agent slug and displacement fluid slug process；

Step 203, stewing well：Target well is boiled in a covered pot over a slow fire into well 3d~7d；

Step 204, opening well and making production.

Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, it is characterized in that：Steam preheating section is carried out in step 201 During plug, according to conventional cyclic steam stimulation method, to 280 tons~320 tons steam are injected residing for target well in thick oil reservoir；Step When carrying out stewing well in 203, according to conventional cyclic steam stimulation method, target well is boiled in a covered pot over a slow fire into well 3d~7d.

Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, it is characterized in that：Heat generating agent slug is carried out in step 101 Before, need first to add thickener into the heat generating agent suspension and stir, per 1m³Heat generating agent suspension addition 1.8g~ 2.6g thickener；When carrying out heat generating agent slug in step 101, the heat generating agent suspension after thickener will be added and inject target well institute Locate in thick oil reservoir.

Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, it is characterized in that：The thickener is hydroxy ethyl fiber Element.

Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, it is characterized in that：Inject the chemical spontaneous hot system Before, first the temperature T of thick oil reservoir residing for target well is tested：When 60 ° of ＜ T≤120 °, according to step 101 to step Method described in 106, chemical spontaneous hot system is injected using cold adopt in thick oil reservoir residing for mode to target well；As T ＞ At 120 °, according to the method described in step 201 to step 204, stored up using viscous crude residing for heat extraction by steam injection mode to target well The chemical spontaneous hot system of injection in layer；When T≤60 °, chemistry is injected using cold adopt in thick oil reservoir residing for mode to target well Spontaneous hot system, process is as follows：

Step 301, heat generating agent slug：According to the method described in step 101, heat generating agent slug process is completed；

Step 302, initiator slug：The initiator solution prepared in advance is injected residing for target well in thick oil reservoir； The initiator solution is that the quality of initiator in the solution being uniformly mixed to form by initiator and water, the initiator solution is dense Spend for 35kg/m³~45kg/m³；

The injection rate of the initiator solution is 0.5m³~1.8m³；

Step 303, according to the method described in step 102 to step 104, by elder generation to rear completion spacer slug, triggering Agent slug and displacement fluid slug process；

Step 304, closing well：By target well closing well 60h~80h；

Step 305, opening well and making production.

Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, it is characterized in that：Initiator was described in step 302 Ammonium sulfate or potassium peroxydisulfate.

Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, it is characterized in that：Mode or steam injection heat are adopted using cold Adopt when injecting chemical spontaneous hot system in thick oil reservoir residing for mode to target well, injected using spontaneous hot system injection device；

The spontaneous hot system injection device is connected including four apparatus for combining liquids and one with the pit shaft of target well Liquid injection pipe, the inlet of four apparatus for combining liquids is connected by a filling pipe with water injection equipment respectively, four institutes The liquid outlet for stating apparatus for combining liquids is connected by a liquid-transport pipe-line with liquid injection pipe respectively, and plunger is housed on the liquid injection pipe Pump, pressure sensing cell and the 5th check valve；Flow control valve and flow detection list are mounted on each filling pipe Check valve is mounted on member, each liquid-transport pipe-line；

Four apparatus for combining liquids include three liquid mixing pits and a liquid blending tank, the liquid blending tank Agitating device is respectively arranged with three liquid mixing pits；Three liquid mixing pits are respectively to described in step 101 The first liquid mixing pit that heat generating agent suspension is mixed, mixing is carried out to triggering agent solution described in step 103 stir The second liquid mixing pit mixed and to being mixed in step 102 with aqueous surfactant solution described in step 104 3rd liquid mixing pit；Be connected to water injection equipment and the first liquid mixing pit, second liquid mixing pit, the 3rd liquid mixing pit and Filling pipe between liquid blending tank is respectively the first filling pipe, the second filling pipe, the 3rd filling pipe and the 4th note The flow control valve and flow detection unit installed on waterpipe, first filling pipe be respectively first flow control valve and The flow control valve and flow detection unit respectively second installed on first flow detection unit, second filling pipe The flow control valve and flow detection unit installed on control valve and second flow detection unit, the 3rd filling pipe point Wei not the 3rd flow control valve and the 3rd flow detection unit, the flow control valve and flow installed on the 4th filling pipe Detection unit is respectively the 4th flow control valve and the 4th flow detection unit；First liquid mixing pit, second liquid mixing pit, It is respectively the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd that 3rd liquid mixing pit and liquid, which mix tank connected liquid-transport pipe-line, Liquid-transport pipe-line and the 4th liquid-transport pipe-line, first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th woven hose The check valve installed on road is respectively the first check valve, the second check valve, the 3rd check valve and the 4th check valve；

Inject before the chemical spontaneous hot system, the stream installed on the 5th check valve, each filling pipe The check valve installed on control valve and each liquid-transport pipe-line is in closed mode.

Chemical Self-heating system injection technology in above-mentioned thick oil reservoir, it is characterized in that：Heat generating agent slug is carried out in step 101 Before, need first to add thickener into the heat generating agent suspension and stir, per 1m³Heat generating agent suspension addition 1.8g~ 2.6g thickener；When carrying out heat generating agent slug in step 101, the heat generating agent suspension after thickener will be added and inject target well institute Locate in thick oil reservoir；

Inject before the chemical spontaneous hot system, first to institute in heat generating agent suspension described in step 101, step 102 State insulating liquid, triggering agent solution described in step 103, initiator solution described in displacement fluid described in step 104 and step 302 Injection rate be determined respectively, and to preparing the heat generating agent suspension, it is the insulating liquid, the triggering agent solution, described Water consumption M1, M2, M3, M4 and M5 and the heat generating agent, the triggering agent, the table of displacement fluid and the initiator solution The consumption of face activating agent, the thickener and the initiator is determined respectively；Afterwards, to the heat generating agent suspension, institute Triggering agent solution, the aqueous surfactant solution and the initiator solution is stated to be mixed respectively；

Wherein, when being mixed to the heat generating agent suspension, first flow control valve is opened, passes through the first filling pipe Into the first liquid mixing pit, water filling and water injection rate are m1, wherein m1=(85%~90%) × M1；After the completion of water filling, the is closed Flow control valve；Further according to the consumption of the thickener of determination, the thickener is added in the first liquid mixing pit simultaneously Stir；Afterwards, according to the consumption of the heat generating agent of determination, the heat generating agent is added in the first liquid mixing pit and stirred Mix, until adding heat generating agent is in suspended state, obtain the heat generating agent suspension after addition thickener；

When being mixed to the triggering agent solution, opening second flow control valve, by the second filling pipe to second Water filling and water injection rate are m2, wherein m2=(85%~90%) × M3 in liquid mixing pit；After the completion of water filling, second flow is closed Control valve；Further according to the consumption of the triggering agent of determination, the triggering agent is added in second liquid mixing pit and stirs equal It is even, it is completely dissolved until adding triggering agent, the triggering agent solution after being dissolved；

When being mixed to the aqueous surfactant solution, according to the use of the insulating liquid of determination and the displacement fluid Water M2 and M4, open the 3rd flow control valve, pass through the 3rd filling pipe water filling into the 3rd liquid mixing pit；Water filling is completed Afterwards, the 3rd flow control valve is closed；Further according to the consumption of the surfactant of determination, the surfactant is added the Three liquid mixing pits are interior and stir, and obtain the aqueous surfactant solution；

When being mixed to the initiator solution, the 4th flow control valve is opened, by the 4th filling pipe to liquid Water filling and water injection rate are m3, wherein m3=(85%~90%) × M5 in blending tank；After the completion of water filling, the control of the 4th flow is closed Valve；Further according to the consumption of the initiator of determination, the initiator is added in liquid blending tank and stirred, until institute Add initiator to be completely dissolved, the initiator solution after being dissolved；

Treat that the heat generating agent suspension, the triggering agent solution, the aqueous surfactant solution and the initiator are molten After the completion of liquid is mixed, start plunger pump and inject the chemical spontaneous hot system；In the chemical spontaneous hot system injection process, The plunger pump continuously works；

When carrying out heat generating agent slug in step 101, the first check valve is opened, thickener will be added in the first liquid mixing pit Thick oil reservoir residing for heat generating agent suspension injection target well afterwards；Heat in the first liquid mixing pit after addition thickener When agent suspension will have been noted, first flow control valve is opened, passes through the water filling into the first liquid mixing pit of the first filling pipe And water injection rate is m4, wherein m4=M1-m1；After the completion of water filling, first flow control valve is closed；Treat institute in the first liquid mixing pit Water filling is injected after thick oil reservoir residing for target well, completes heat generating agent slug process；

When step 103 carries out triggering agent slug, the second check valve is opened, by the triggering after being dissolved in second liquid mixing pit Thick oil reservoir residing for agent solution injection target well；Triggering agent solution after being dissolved in the second liquid mixing pit will have been noted When, second flow control valve is opened, water filling and water injection rate are m5 into second liquid mixing pit by the second filling pipe, wherein M5=M3-m2；After the completion of water filling, second flow control valve is closed；Treat that target well is injected in institute's water filling in second liquid mixing pit After residing thick oil reservoir, triggering agent slug process is completed；

When carrying out initiator slug in step 302, the 4th check valve is opened, by the initiator after being dissolved in liquid blending tank Thick oil reservoir residing for solution injection target well；When initiator solution after being dissolved in the liquid blending tank will have been noted, open 4th flow control valve, by the 4th filling pipe, into liquid blending tank, water filling and water injection rate are m6, wherein m6=M5-m3； After the completion of water filling, second flow control valve is closed；After thick oil reservoir residing for target well is injected in institute's water filling in liquid blending tank, Complete initiator slug process.

Meanwhile, the invention also discloses a kind of simple in construction, reasonable in design and pipeline it is easy to connect, using it is easy to operate, Chemical Self-heating system injection device in the good thick oil reservoir of using effect, it is characterised in that：Including four apparatus for combining liquids The liquid injection pipe being connected with one with the pit shaft of target well, the inlet of four apparatus for combining liquids passes through a water filling respectively Pipeline is connected with water injection equipment, and the liquid outlet of four apparatus for combining liquids is connected by a liquid-transport pipe-line and liquid injection pipe respectively Connect, plunger pump, pressure sensing cell and the 5th check valve are housed on the liquid injection pipe；It is mounted on each filling pipe Check valve is mounted on flow control valve and flow detection unit, each liquid-transport pipe-line；

Four apparatus for combining liquids include three liquid mixing pits and a liquid blending tank, the liquid blending tank Agitating device is respectively arranged with three liquid mixing pits；Three liquid mixing pits are respectively to described in step 101 The first liquid mixing pit that heat generating agent suspension is mixed, mixing is carried out to triggering agent solution described in step 103 stir The second liquid mixing pit mixed and to being mixed in step 102 with aqueous surfactant solution described in step 104 3rd liquid mixing pit；Be connected to water injection equipment and the first liquid mixing pit, second liquid mixing pit, the 3rd liquid mixing pit and Filling pipe between liquid blending tank is respectively the first filling pipe, the second filling pipe, the 3rd filling pipe and the 4th note The flow control valve and flow detection unit installed on waterpipe, first filling pipe be respectively first flow control valve and The flow control valve and flow detection unit respectively second installed on first flow detection unit, second filling pipe The flow control valve and flow detection unit installed on control valve and second flow detection unit, the 3rd filling pipe point Wei not the 3rd flow control valve and the 3rd flow detection unit, the flow control valve and flow installed on the 4th filling pipe Detection unit is respectively the 4th flow control valve and the 4th flow detection unit；First liquid mixing pit, second liquid mixing pit, It is respectively the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd that 3rd liquid mixing pit and liquid, which mix tank connected liquid-transport pipe-line, Liquid-transport pipe-line and the 4th liquid-transport pipe-line, first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th woven hose The check valve installed on road is respectively the first check valve, the second check valve, the 3rd check valve and the 4th check valve.

Above-mentioned injection device, it is characterized in that：Also include the first current divider and the second current divider, first current divider and the The structure of two current dividers is identical and the two includes first inlet/outlet and multiple second inlet/outlets；The water filling is set Standby delivery port is connected by connecting pipe with the first inlet/outlet of the first current divider, four institutes of first current divider State the second inlet/outlet respectively by the first filling pipe, the second filling pipe, the 3rd filling pipe and the 4th filling pipe with The inlet connection of four apparatus for combining liquids；The liquid outlet of four apparatus for combining liquids passes through the first transfusion respectively Four second inlet/outlets of pipeline, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line and the second current divider Mouth connection, the first inlet/outlet of second current divider is connected with liquid injection pipe.

The present invention has advantages below compared with prior art：

1st, the chemical spontaneous hot system injection technology step used is simple, reasonable in design and realizes conveniently, easy to operate.

2nd, the chemical spontaneous hot system injection device used is simple in construction, reasonable in design and installs laying conveniently, input Cost is relatively low.

3rd, the chemical spontaneous hot system injection device used uses easy to operate, reliable working performance and using effect It is good and widely applicable, can be effectively applicable to viscous crude, in super-viscous oil reservoir chemical Self-heating system injection and Self-heating temperature raising Synergy is developed.

4th, the chemical spontaneous hot system preparation method that is used is simple and injection rate is easy to determine, using effect is good, has Heat efficiency high, transport and injection process it is safe and reliable, it is temperature sensitive triggering it is rapid the advantages of, and according to residing for target well viscous crude store up The acid-base property of layer, has alkaline spontaneous hot system and acid spontaneous hot system two types, specific aim is stronger, and temperature raising effect is more It is good.

5th, according to residing for target well thick oil reservoir temperature T, correspondence take three kinds of different types of injection technologies, wherein, When 60 ° of ＜ T≤120 °, chemical spontaneous hot system is injected using cold adopt in thick oil reservoir residing for mode to target well 8, injected Journey mainly includes heat generating agent slug, spacer slug, triggering four steps of agent slug and displacement fluid slug；As 120 ° of T ＞, adopt With chemical spontaneous hot system is injected residing for heat extraction by steam injection mode to target well 8 in thick oil reservoir, injection process mainly includes steaming Vapour preheating slug, heat generating agent slug, spacer slug, triggering five steps of agent slug and displacement fluid slug；When T≤60 °, adopt Chemical spontaneous hot system is injected residing for mode to target well 8 in thick oil reservoir with cold adopt, injection process mainly includes heat generating agent section Plug, initiator slug, spacer slug, triggering five steps of agent slug and displacement fluid slug, inject better, can meet not Synthermal T thick oil reservoir injection demand.

The 6th, pressure sensing cell is housed on liquid injection pipe, quick, accurate detection can be carried out to injection pressure, and detection can be tied Fruit is intuitively indicated, is conducive to the pressure change of monitoring liquid injection pipe in time, and foundation is provided for adjustment injection parameter.Meanwhile, Flow control valve and flow detection unit, injection flow that is easy, quickly adjusting each filling pipe are housed on filling pipe.

7th, the plunger pump installed on liquid injection pipe can meet heat generating agent suspension, triggering agent solution, aqueous surfactant solution With in the demand that is pumped into of initiator solution, and chemical spontaneous hot system injection process, plunger pump not termination of pumping, continuous work, behaviour Make easy and realize conveniently, and injection process is safe and reliable and efficient, it is to avoid because the consumption that start and stop plunger pump is brought is repeated several times When, effort, easily cause the problems such as plunger pump is damaged.

8th, by the pumping pressure of pilot plunger pump, simplicity can be carried out to the injection pressure of liquid injection pipe, fast and accurately adjusted Section, it is real in combination with the pressure sensing cell on the flow control valve and flow detection unit and liquid injection pipe on each filling pipe Now to injection rate, injection flow and the note of heat generating agent suspension, triggering agent solution, aqueous surfactant solution and initiator solution Enter pressure and carry out simplicity, fast and accurately demand for control, so as to realize the easy, quick of chemical spontaneous hot system injection process And purpose is accurately controlled, and accordingly reach the purpose that security control is carried out to the endogenous heat reaction layer by layer of oil storage residing for target well.

9th, the chemical spontaneous hot system injection device energy simplicity used realizes heat generating agent suspension, triggering agent solution, table The extemporaneous preparation and simplicity of face aqueous surfactant solutions and initiator solution, efficiently injection.Also, by heat generating agent suspension Thickener is added, the efficient carrying of particle heat generating agent can be solved the problems, such as.

10th, processing step is simple, reasonable in design and easy to operate, water-injection efficiency is high, using effect good, easy can complete thick The injection process of chemical Self-heating system in oily reservoir, injection process is safe and reliable, injects chemical spontaneous hot system heat effect Rate is high and temperature raising effect is good, has the advantages that equipment is simple, arrange convenient, perfect in shape and function and easy to operate, injection effect is good, can Realize the purpose that spontaneous heat chemistry temperature raising medicament system is pumped into safely inside viscous crude super-viscous oil reservoir and pyrogenic reaction is controllable.And And, the present invention can realize the accurate fixed of heat generating agent suspension, triggering agent solution, aqueous surfactant solution and initiator solution Amount, segmentation plug injection, pressure is within 25MPa, flow is in 10m³/ h is adjustable with quantification, meets the safety of active metal system Injection and the accurate control of reaction, while the segmentation plug for also meeting other widely used spontaneous hot systems at present accurately injects Demand.

11st, widely applicable, the total completion time that is particularly suitable for use in is good, shaft bottom is more than without mechanical sand control equipment and reservoir permeability 100×10^-3μm², reservoir thickness is more than 3m, reservoir temperature and is less than 120 degrees Celsius of oil well, and be preferably applied in viscosity of crude More than 2000mPas, the poor heavy oil wells of feed flow and edge or the heavy oil wells for not possessing steam injection condition.Entered using the present invention During the spontaneous hot work of row, according to reservoir temperature is different or mining type (cold adopt, steam injection is adopted) is different, from different injection works Skill.

Below by drawings and examples, technical scheme is described in further detail.

Brief description of the drawings

Fig. 1 is the note when present invention injects chemical spontaneous hot system using the cold mode of adopting when thick oil reservoir temperature is higher than 60 ° Enter process flow diagram.

Fig. 2 is the note when present invention injects chemical spontaneous hot system using the cold mode of adopting when thick oil reservoir temperature is less than 60 ° Enter process flow diagram.

Fig. 3 injects injection technology FB(flow block) during chemical spontaneous hot system for the present invention using heat extraction by steam injection mode.

Fig. 4 is the structural representation of injection device of the present invention.

Description of reference numerals:

1-water injection equipment；2-the first liquid mixing pit；3-second liquid mixing pit；

4-the three liquid mixing pit；5-liquid blending tank；6-the second current divider；

7-plunger pump；8-target well；9-1-first flow control valve；

9-2-second flow control valve；The flow control valves of 9-3-the 3rd；

The flow control valves of 9-4-the 4th；The check valves of 10-1-first；The check valves of 10-2-second；

The check valves of 10-3-the 3rd；The check valves of 10-4-the 4th；The check valves of 10-5-the 5th；

11-1-first flow detection unit；

11-2-second flow detection unit；

The flow detection units of 11-3-the 3rd；

The flow detection units of 11-4-the 4th；12-pressure gauge；

13-the first current divider；14-liquid injection pipe.

Embodiment

Embodiment 1

Chemical Self-heating system injection technology, mode is adopted using cold in a kind of thick oil reservoir as shown in Figure 1, Figure 2 and Figure 3 Or chemical spontaneous hot system is injected residing for heat extraction by steam injection mode to target well 8 in thick oil reservoir；The chemical spontaneous hot system Including heat generating agent and triggering agent and its be alkaline spontaneous hot system or acid spontaneous hot system, the heat generating agent include granularity it is little In the work ripple metallic particles of 400 mesh and clad for wrapping up ripple metallic particles living；The work ripple of the alkaline spontaneous hot system Metallic particles is aluminium powder, and the clad for wrapping up aluminium powder is paraffin clad or aluminum stearate clad, and the alkalescence is spontaneous The triggering agent of hot system is NaOH powder, and the mass ratio of aluminium powder and NaOH powder is 1 ︰ (1.0~2.5)；The acid Self-heating The work ripple metallic particles of system is magnesium powder, and the clad for wrapping up magnesium powder is paraffin clad or magnesium stearate clad, institute The triggering agent for stating acid spontaneous hot system is P₂O₅Powder, magnesium powder and P₂O₅The mass ratio of powder is 1 ︰ (1.0~2.0)；Injection institute Before stating chemical spontaneous hot system, first according to residing for target well 8 thick oil reservoir acid-base property, to injected chemical spontaneous hot system Type be determined：When thick oil reservoir residing for target well 8 is acidity, it is alkaline Self-heating to inject chemical spontaneous hot system System；When thick oil reservoir residing for target well 8 is alkalescence, chemical spontaneous hot system is injected for acid spontaneous hot system；

Wherein, using it is cold adopt inject chemical spontaneous hot system in thick oil reservoir residing for mode to target well 8 when, process is such as Under：

Step 101, heat generating agent slug：By thick oil reservoir residing for the heat generating agent suspension prepared in advance injection target well 8 It is interior；

During the heat generating agent suspension is the suspension that is uniformly mixed to form by heat generating agent and water, the heat generating agent suspension The mass percent concentration of heat generating agent is 28%~35%；The injection rate of the heat generating agent suspension is thick according to residing for target well 8 Oily reservoir temperature lifting institute calorific requirement is determined；

Step 102, spacer slug：The insulating liquid prepared in advance is injected residing for target well 8 in thick oil reservoir；

The injection rate of the insulating liquid is the 35%~40% of the wellbore volume of target well 8；

Step 103, triggering agent slug：The triggering agent solution prepared in advance is injected residing for target well 8 in thick oil reservoir, The triggering agent solution is the quality hundred of triggering agent in the solution being uniformly mixed to form by triggering agent and water, the triggering agent solution Specific concentration is divided to be not less than 40%；

Step 104, displacement fluid slug：The displacement fluid prepared in advance is injected residing for target well 8 in thick oil reservoir；

The injection rate of the displacement fluid is the 60%~65% of the wellbore volume of target well 8；

Step 105, closing well：By the closing well 60h of target well 8~80h；

Step 106, opening well and making production；

During using injecting chemical spontaneous hot system in thick oil reservoir residing for heat extraction by steam injection mode to target well 8, process is such as Under：

Step 201, steam preheating slug：To 280 tons~320 tons steam are injected residing for target well 8 in thick oil reservoir, to mesh Thick oil reservoir residing for mark well 8 is preheated；

Step 203, stewing well：Target well 8 is boiled in a covered pot over a slow fire into well 3d~7d；

Step 204, opening well and making production.

In the present embodiment, inject before the chemical spontaneous hot system, first to the temperature T of thick oil reservoir residing for target well 8 Tested：When 60 ° of ＜ T≤120 °, according to the method described in step 101 to step 106, using cold mode of adopting to target The chemical spontaneous hot system of injection, refers to Fig. 1 in thick oil reservoir residing for well 8；As 120 ° of T ＞, according to step 201 to step 204 Described in method, using chemical spontaneous hot system is injected residing for heat extraction by steam injection mode to target well 8 in thick oil reservoir, refer to Fig. 3；As shown in Fig. 2 when T≤60 °, chemical Self-heating body is injected residing for mode to target well 8 in thick oil reservoir using cold adopt System, process is as follows：

Step 302, initiator slug：The initiator solution prepared in advance is injected residing for target well 8 in thick oil reservoir； The initiator solution is that the quality of initiator in the solution being uniformly mixed to form by initiator and water, the initiator solution is dense Spend for 35kg/m³~45kg/m³；

The injection rate of the initiator solution is 0.5m³~1.8m³；

Step 304, closing well：By the closing well 60h of target well 8~80h；

Step 305, opening well and making production.

In the present embodiment, the basic parameter of the target well 8 refers to table 1：

The target well basic parameter table of table 1

In the present embodiment, the thick oil reservoir temperature lifting institute calorific requirement according to residing for target well 8, to the heat generating agent suspension Injection rate when being determined, be specifically that the consumption of heat generating agent in the heat generating agent suspension is determined.Also, to described When the consumption of heat generating agent is determined in heat generating agent suspension, with reference to the thermal discharge of heat generating agent, the consumption of budgetary estimate heat generating agent.And And, according to the relation of the thermal discharge of heat generating agent and steam heat, the consumption of heat generating agent is determined.

Wherein, the thermal discharge of heat generating agent, refers to the thermal discharge of one mole of ripple metallic particles living；The acidity is spontaneous In hot system, the thermal discharge of the ripple metallic particles living is 467.7kJ/mol (i.e. 467.7kJ/mol Mg)；The alkalescence is spontaneous In hot system, the thermal discharge of the ripple metallic particles living is 416.5kJ/mol (i.e. 416.5kJ/mol Al).So, according to mesh Thick oil reservoir temperature lifting institute calorific requirement residing for well 8 is marked, and with reference to the thermal discharge of the ripple metallic particles living, can be calculated described The consumption of ripple metallic particles living；Further according to the consumption of the ripple metallic particles living, the consumption of the heat generating agent is extrapolated；Afterwards, According to the consumption of the heat generating agent, the injection rate of the heat generating agent suspension and the water consumption of the heat generating agent suspension are extrapolated M1。

In the present embodiment, the temperature of thick oil reservoir temperature residing for the target well 8 is 66 DEG C, according to the injection shown in Fig. 1 Technique, and chemical spontaneous hot system is injected using cold adopt in thick oil reservoir residing for mode to target well 8.

In the present embodiment, the chemical spontaneous hot system injected acts on 1.6 meters of thick oil pays of 5 meters~15 meters scopes (i.e. Thick oil reservoir residing for target well 8), crude oil lifts temperature to 120 DEG C, and stratum water lifts temperature to 100 DEG C, and formation rock skeleton lifts temperature to 120 DEG C, the thermal discharge of heat generating agent presses 643.45kJ/mol, and the consumption that budgetary estimate goes out the ripple metallic particles living is 2 tons, the heat generating agent The injection rate of suspension is 10m³, mutually tackle water consumption M1 and be determined.

When actual use, the water consumption M1 of the heat generating agent suspension can be adjusted, the life according to actual needs The mass percent concentration of heat generating agent is 28%~35% in thermit powder suspension.

After the consumption of the ripple metallic particles living is determined, with reference to the ripple metallic particles living and the quality of the triggering agent Than being determined to the consumption of the triggering agent；Further according to the consumption of the triggering agent, to the injection rate of the triggering agent capacity It is determined with water consumption M3.In the present embodiment, the consumption of triggering agent is 1.4 tons, and the injection rate of triggering agent solution is 6m³。

In the present embodiment, when being determined to the consumption for triggering agent, touched according to the ripple metallic particles living with described The reactive chemistry formula of hair agent is determined.The acid spontaneous hot system is in use, hot conditions in the pit shaft of target well 8 Under, the clad fusing on magnesium powder surface, the magnesium powder of cladding occurs as follows after being contacted with stratum water and the triggering agent being subsequently injected into Reaction：

Mg+2H₂O→H₂↑+Mg(OH)₂↓；

P₂O₅+3H₂O→H₃PO₄；

3Mg(OH)₂+2H₃PO₄→Mg₃(PO₄)₂+6H₂O；

More than reaction be progress simultaneously, thus its reaction equation can be write as：

3Mg+P₂O₅+3H₂O→3H₂↑+Mg₃(PO₄)₂；

Mg₃(PO₄)₂It is fanout free region to stratum for a kind of soluble salt, it, which reacts, releases 467.7KJ/mol Mg's Heat, realizes spontaneous heat chemistry temperature raising.

The alkaline spontaneous hot system is in use, under hot conditions in the pit shaft of target well 8, the clad on aluminium powder surface Following reaction occurs after being contacted with stratum water and the triggering agent being subsequently injected into for fusing, the aluminium powder of cladding：

2Al+6H₂O→3H₂↑+2Al(OH)₃↓,

Al(OH)₃+NaOH→NaAlO₂+2H₂O,

2Al+2NaOH+2H₂O→3H₂↑+2NaAlO₂,

416.5KJ/mol Al heat is released in reaction, realizes spontaneous heat chemistry temperature raising.

When being prepared to heat generating agent, when the clad is paraffin clad, the preparation method bag of the heat generating agent Include following steps：

Step 11, under 65 DEG C~70 DEG C of stirring condition, paraffin is added in hexamethylene until be completely melt, stone is obtained Wax mass concentration is 20%~40% cladding solution, then according to ripple metallic particles living under temperature-resistant stirring condition The mass ratio of (magnesium powder or aluminium powder) and paraffin is (4~6):1 ratio adds ripple metallic particles living in cladding solution, constant temperature point Dissipate 20min~40min；

Step 12, material of the constant temperature in step 11 after scattered in 100rpm~150rpm stirring condition dropped into room Temperature, paraffin condenses in ripple surface of metal particles living, is filtered after stratification, obtains filter residue；

Step 13, filter residue described in step 12 is rinsed with hexamethylene after be dried in vacuo, then by the filter after vacuum drying Slag is ground, and obtains solid granular heat generating agent；Vacuum drying temperature is 18 DEG C~25 DEG C, and the vacuum drying time is 8h ~15h；

When the clad is magnesium stearate clad, the preparation method of the heat generating agent comprises the following steps：

Step 21, under 50 DEG C~60 DEG C of water bath condition, by absolute ethyl alcohol constant temperature stir 30min~60min, Ran Houxiang Stearic acid is added in absolute ethyl alcohol, stirring is completely dissolved to stearic acid, obtain the bag that stearic acid mass concentration is 0.5%~2% Cover solution, then according to ripple metallic particles living and stearic mass ratio be under agitation (80~120):1 ratio will be living Ripple metallic particles is added in cladding solution, and constant temperature disperses 20min~40min, and stearic acid is given birth to part ripple metallic particles reaction living Into magnesium stearate or aluminum stearate；

Step 22, material of the constant temperature in step 21 after scattered in 100rpm~150rpm stirring condition dropped into room Temperature, the magnesium stearate or aluminum stearate for reacting generation condenses in remaining magnesium powder or aluminium powder surface, continues to stir 30min~90min After filter, obtain filter residue；

Step 23, filter residue described in step 22 is dried in vacuo, then ground the filter residue after vacuum drying, Obtain solid granular heat generating agent；Vacuum drying temperature is 18 DEG C~25 DEG C, and the vacuum drying time is 8h~15h.

In the present embodiment, pit shaft (also referred to as sleeve pipe) volume in the target well 8 is

In the present embodiment, the injection rate of insulating liquid described in step 102 is 6m³, the injection of displacement fluid described in step 104 Measure as 10m³。

, can according to specific needs when actual use, the injection rate to the insulating liquid and the displacement fluid is accordingly adjusted It is whole.

Carried out in the present embodiment, in step 101 before heat generating agent slug, need first to add increasing into the heat generating agent suspension Thick dose and stir, per 1m³Heat generating agent suspension adds 1.8g~2.6g thickeners；Heat generating agent slug is carried out in step 101 When, the heat generating agent suspension after thickener will be added and injected residing for target well 8 in thick oil reservoir.The thickener increases to be water-soluble Thick dose.

In the present embodiment, the thickener is hydroxyethyl cellulose.

Also, while adding thickener into the heat generating agent suspension, also need to add into the heat generating agent suspension Enter sodium chloride, the mass ratio for adding thickener and sodium chloride is 1 ︰ 20~30.

In the present embodiment, when carrying out opening well and making production in step 106 neutralization procedure 204, according to conventional flooding method, using note Water law or air injection method proceed the displacement of reservoir oil to target well 8.

As shown in figure 4, chemistry is injected residing for mode or heat extraction by steam injection mode to target well 8 in thick oil reservoir using cold adopt During spontaneous hot system, injected using spontaneous hot system injection device.

The spontaneous hot system injection device is connected including four apparatus for combining liquids and one with the pit shaft of target well 8 Liquid injection pipe 14, the inlet of four apparatus for combining liquids is connected by a filling pipe with water injection equipment 1 respectively, four The liquid outlet of the apparatus for combining liquids is connected by a liquid-transport pipe-line with liquid injection pipe 14 respectively, is equipped with the liquid injection pipe 14 Plunger pump 7, pressure sensing cell and the 5th check valve 10-5；Flow control valve and stream are mounted on each filling pipe Check valve is mounted on amount detection unit, each liquid-transport pipe-line.

Four apparatus for combining liquids include three liquid mixing pits and a liquid blending tank 5, the liquid mixing Agitating device is respectively arranged with tank 5 and three liquid mixing pits；Three liquid mixing pits are respectively to institute in step 101 State the first liquid mixing pit 2 that heat generating agent suspension mixed, mixed to triggering agent solution described in step 103 The second liquid mixing pit 3 of stirring and to being mixed in step 102 with aqueous surfactant solution described in step 104 The 3rd liquid mixing pit 4；The liquid mixing pit 2 of water injection equipment 1 and first, second liquid mixing pit 3, the 3rd liquid is connected to mix The filling pipe closed between pond 4 and liquid blending tank 5 is respectively the first filling pipe, the second filling pipe, the 3rd filling pipe With the 4th filling pipe, the flow control valve and flow detection unit respectively first flow installed on first filling pipe The flow control valve and flow detection installed on control valve 9-1 and first flow detection unit 11-1, second filling pipe Unit is respectively the stream installed on second flow control valve 9-2 and second flow detection unit 11-2, the 3rd filling pipe Control valve and flow detection unit are respectively the 3rd flow control valve 9-3 and the 3rd flow detection unit 11-3, the described 4th The flow control valve and flow detection unit installed on filling pipe are respectively the 4th flow control valve 9-4 and the 4th flow detection Unit 11-4；It is defeated that first liquid mixing pit 2, second liquid mixing pit 3, the 3rd liquid mixing pit 4 and liquid blending tank 5 are connected Liquid pipe road is respectively the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, first transfusion The check valve installed on pipeline, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line is respectively the first check valve 10- 1st, the second check valve 10-2, the 3rd check valve 10-3 and the 4th check valve 10-4.

Inject before the chemical spontaneous hot system, installed on the 5th check valve 10-5, each filling pipe Flow control valve and each liquid-transport pipe-line on the check valve installed be in closed mode.

In the chemical spontaneous hot system injection process, pass through injection pressure of the pressure sensing cell to liquid injection pipe 14 It is monitored, and by the control of injection pressure of liquid injection pipe 14 within 90% of the fracture pressure of thick oil reservoir residing for target well 8.

In the present embodiment, the spontaneous hot system injection device also includes the first current divider 13 and the second current divider 6, described First current divider 13 it is identical with the structure of the second current divider 6 and the two include first inlet/outlet and multiple second entering/ Delivery port；The delivery port of the water injection equipment 1 is connected by connecting pipe with the first inlet/outlet of the first current divider 13, institute Four second inlet/outlets of the first current divider 13 are stated respectively by the first filling pipe, the second filling pipe, the 3rd note Waterpipe and the 4th filling pipe are connected with the inlet of four apparatus for combining liquids；Four apparatus for combining liquids Liquid outlet is shunted by the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line and second respectively Four the second inlet/outlet connections of device 6, the first inlet/outlet of second current divider 6 is connected with liquid injection pipe 14.

In the present embodiment, the agitating device installed in the liquid blending tank 5 and three liquid mixing pits is electricity Dynamic agitating device, time saving and energy saving and operation is simply.

In the present embodiment, the first liquid mixing pit 2, the volume of the liquid mixing pit 4 of second liquid mixing pit 3 and the 3rd It is 15m³, the volume of the liquid blending tank 5 is 2m³。

, can according to specific needs, to the first liquid mixing pit 2, second liquid mixing pit 3, the 3rd liquid when actual use The volume of mixing pit 4 and liquid blending tank 5 is adjusted accordingly.

In the present embodiment, the pressure sensing cell is pressure gauge 12, the first flow detection unit 11-1, second Amount detection unit 11-2, the 3rd flow detection unit 11-3 and the 4th flow detection unit 11-4 are flowmeter.

Before actual use, the distributing room for water injection for water filling is built in the week side of boss of target well 8, the water injection equipment 1, which is arranged on, matches somebody with somebody In water.

In the present embodiment, the first liquid mixing pit 2, second liquid mixing pit 3, the 3rd liquid mixing pit 4 and liquid The bottom of blending tank 5 is inclined plane, the first liquid mixing pit 2, second liquid mixing pit 3, the and of the 3rd liquid mixing pit 4 The inlet of liquid blending tank 5 is respectively positioned on top and its liquid outlet is respectively positioned on the lower end of inclined plane, thus can ensure that internal liquid Pump out completely；Also, the first liquid mixing pit 2, second liquid mixing pit 3, the 3rd liquid mixing pit 4 and liquid blending tank The volume being provided with 5 madial wall between a plurality of water level marking line, adjacent two water level marking lines is 0.5m³。

Due to the flow control valve and flow detection unit that are respectively mounted on each filling pipe, thus can ensure that water by The accurate injection of amount, and the injecting process is stable.

In the present embodiment, the pump pressure of the plunger pump 7 is more than 30MPa and its frequency conversion drive, operation medium comprising water, oil, Polymer solution, the solution containing particle diameter less than 100 microns of solid particles, and it is acidproof, alkaline-resisting.

In the present embodiment, the connecting pipe, the filling pipe, the liquid-transport pipe-line, liquid injection pipe 14, each filling pipe Check valve, the first current divider 13 and the second current divider 6 installed on the flow control valve of upper installation, each liquid-transport pipe-line are pressure-resistant 25MPa and acidproof, alkaline-resisting.

In the present embodiment, inject before the chemical spontaneous hot system, first to heat generating agent suspension described in step 101, The injection rate difference of displacement fluid described in insulating liquid described in step 102, triggering agent solution described in step 103 and step 104 It is determined, and water is used to the preparation heat generating agent suspension, the insulating liquid, the triggering agent solution and the displacement fluid Measure the consumption difference of M1, M2, M3 and M4 and the heat generating agent, the triggering agent, the surfactant and the thickener It is determined；Afterwards, the heat generating agent suspension, the triggering agent solution and the aqueous surfactant solution are carried out respectively Mixing；

Wherein, when being mixed to the heat generating agent suspension, first flow control valve 9-1 is opened, passes through the first water filling Pipeline water filling and water injection rate into the first liquid mixing pit 2 are m1, wherein m1=(85%~90%) × M1；After the completion of water filling, Close first flow control valve 9-1；Further according to the consumption of the thickener of determination, the thickener is added into the first liquid and mixed Close in pond 2 and stir；Afterwards, according to the consumption of the heat generating agent of determination, the heat generating agent is added into the first liquid and mixed Close in pond 2 and stir, until adding heat generating agent is in suspended state, obtain the heat generating agent suspension after addition thickener. In the present embodiment, when being added to the thickener and the heat generating agent, addition is the whole for predefining consumption.To institute State thickener and when the heat generating agent is added, be both needed to be slowly added to.Treat that the thickener is added in the first liquid mixing pit 2 And stir, and reach after the viscosity being pre-designed；It is slow added into heat generating agent.

When being mixed to the triggering agent solution, opening second flow control valve 9-2, by the second filling pipe to the Water filling and water injection rate are m2, wherein m2=(85%~90%) × M3 in two liquid mixing pits 3；After the completion of water filling, second is closed Flow control valve 9-2；Further according to the consumption of the triggering agent of determination, the triggering agent is added in second liquid mixing pit 3 And stir, it is completely dissolved until adding triggering agent, the triggering agent solution after being dissolved.In the present embodiment, to institute Triggering agent is stated when being added, addition for predetermined consumption whole.

When being mixed to the aqueous surfactant solution, according to the use of the insulating liquid of determination and the displacement fluid Water M2 and M4, open the 3rd flow control valve 9-3, pass through the 3rd filling pipe water filling into the 3rd liquid mixing pit 4；Water filling After the completion of, close the 3rd flow control valve 9-3；Further according to the consumption of the surfactant of determination, by the surface-active Agent is added in the 3rd liquid mixing pit 4 and stirred, and obtains the aqueous surfactant solution.In the present embodiment, obtained The amount of aqueous surfactant solution is more than the injection rate sum of the insulating liquid and the displacement fluid.Thus, pass through the 3rd water filling Pipeline is into the 3rd liquid mixing pit 4 during water filling, and water injection rate is more than M2+M4.

The present embodiment, to the heat generating agent suspension, the triggering agent solution, the aqueous surfactant solution and described When initiator solution is mixed, also need to carry out pressure testing to injection device as shown in Figure 4.It is mixed using the 3rd liquid during pressure testing The aqueous surfactant solution closed in pond 4 carries out pressure testing, sprains and is pressed onto 20MPa, does not pierce within 3 minutes and do not leak to be qualified.

After the completion for the treatment of that the heat generating agent suspension, the triggering agent solution and the aqueous surfactant solution are mixed, Start plunger pump 7 and inject the chemical spontaneous hot system；In the chemical spontaneous hot system injection process, the plunger pump 7 connects Continuous work.That is, in the chemical spontaneous hot system injection process, the not termination of pumping of plunger pump 7.In the present embodiment, institute The injection rate for stating initiator capacity is zero.

When carrying out heat generating agent slug in step 101, the first check valve 10-1 is opened, will be added in the first liquid mixing pit 2 Thick oil reservoir residing for heat generating agent suspension injection target well 8 after thickener；Addition thickener in the first liquid mixing pit 2 When heat generating agent suspension afterwards will have been noted, first flow control valve 9-1 is opened, it is mixed to the first liquid by the first filling pipe It is m4, wherein m4=M1-m1 to close water filling and water injection rate in pond 2；After the completion of water filling, first flow control valve 9-1 is closed；Treat first Institute's water filling is injected after thick oil reservoir residing for target well 8 in liquid mixing pit 2, completes heat generating agent slug process.

When step 103 carries out triggering agent slug, the second check valve 10-2 is opened, after being dissolved in second liquid mixing pit 3 Triggering agent solution injection target well 8 residing for thick oil reservoir；Triggering agent solution after dissolving in the second liquid mixing pit 3 is When will note, second flow control valve 9-2, water filling and water filling into second liquid mixing pit 3 by the second filling pipe are opened Measure as m5, wherein m5=M3-m2；After the completion of water filling, second flow control valve 9-2 is closed；Treat to be noted in second liquid mixing pit 3 Water is injected after thick oil reservoir residing for target well 8, completes triggering agent slug process.

In the present embodiment, in step 101 during progress heat generating agent slug, Synchronous pressure gauge 12, when pressure is rapid Rise or stop injection during more than 15MPa, and ascertain the reason；In injection process, the endogenous heat agent of observation the first liquid mixing pit 2 is hanged The level change of supernatant liquid, when the heat generating agent suspension after addition thickener in the first liquid mixing pit 2 will have been noted, opens the Flow control valve 9-1, observation first flow detection unit 11-1 institutes detection stream value, by the first filling pipe to the first liquid Water filling and water injection rate are persistently to be stirred in m4, the injecting process in body mixing pit 2, until the endogenous heat of the first liquid mixing pit 2 Untill agent suspension injects.

In the present embodiment, in step 101 after the completion of heat generating agent slug, the 3rd check valve 10-3 is first opened, first is turned off Check valve 10-1, during do not need termination of pumping, insulating liquid is injected residing for target well 8 in thick oil reservoir.The insulating liquid injection During, the level change of the internal surfactants aqueous solution of the 3rd liquid mixing pit 4 is observed, the current note of the insulating liquid is grasped Enter amount.

Treat after the completion of the insulating liquid injection, first open the second check valve 10-2, turn off the 3rd check valve 10-3, process In do not need termination of pumping, and observe the level change of the triggering agent solution after being dissolved in second liquid mixing pit 3, second liquid mixing When triggering agent solution after being dissolved in pond 3 will have been noted, second flow control valve 9-2 is opened, second flow detection unit is observed 11-2 institutes detection stream value, by the second filling pipe, into second liquid mixing pit 3, water filling and water injection rate are m5, the injecting process In be persistently stirred, untill the internal trigger agent solution of second liquid mixing pit 3 injects.

Triggered in the present embodiment, in step 103 after the completion of agent slug, first open the 3rd check valve 10-3, turn off second Check valve 10-2, during do not need termination of pumping, displacement fluid is injected residing for target well 8 in thick oil reservoir.The displacement fluid injection During, the level change of the internal surfactants aqueous solution of the 3rd liquid mixing pit 4 is observed, the current note of the displacement fluid is grasped Enter amount.

In step 104 after the completion of displacement fluid slug, plunger pump 7 is closed, and closes the 3rd check valve 10-3, while closing well 72 Hour.After closed-in time arrives, opening well and making production fulfils assignment.

When actual use, the closed-in time can be adjusted according to specific needs.

Embodiment 2

In the present embodiment, as shown in Fig. 2 as different from Example 1：The temperature T of thick oil reservoir residing for the target well 8 ≤ 60 °, chemical spontaneous hot system is injected using cold adopt in thick oil reservoir residing for mode to target well 8, process is as follows：

The injection rate of the initiator solution is 0.5m³~1.8m³；

Step 304, closing well：By the closing well 60h of target well 8~80h；

Step 305, opening well and making production.

In the present embodiment, inject before the chemical spontaneous hot system, first to heat generating agent suspension described in step 301, The note of insulating liquid described in initiator solution described in step 302 and step 303, the triggering agent solution and the displacement fluid Enter amount to be determined respectively, and to preparing the heat generating agent suspension, the insulating liquid, the triggering agent solution, the replacement Water consumption M1, M2, M3, M4 and M5 and the heat generating agent of liquid and the initiator solution, the triggering agent, the surface are lived The consumption of property agent, the thickener and the initiator is determined respectively；Afterwards, to the heat generating agent suspension, it is described touch Hair agent solution, the aqueous surfactant solution and the initiator solution are mixed respectively.Wherein, the heat generating agent suspends The mixed method of liquid, the triggering agent solution and the aqueous surfactant solution is same as Example 1.

When being mixed to the initiator solution, the 4th flow control valve 9-4 is opened, by the 4th filling pipe to liquid Water filling and water injection rate are m3, wherein m3=(85%~90%) × M5 in body blending tank 5；After the completion of water filling, the 4th flow is closed Control valve 9-4；Further according to the consumption of the initiator of determination, the initiator is added in liquid blending tank 5 and stirs equal It is even, it is completely dissolved until adding initiator, the initiator solution after being dissolved.

In the present embodiment, in step 301 after the completion of heat generating agent slug, initiator slug is first carried out.

In the present embodiment, the initiator is water soluble starter, and the initiator is ammonium persulfate or persulfuric acid Potassium.

Also, when carrying out initiator slug in step 302, the 4th check valve 10-4 is opened, will be dissolved in liquid blending tank 5 Thick oil reservoir residing for initiator solution injection target well 8 afterwards；Initiator solution after being dissolved in the liquid blending tank 5 will When having noted, the 4th flow control valve 9-4 is opened, water filling and water injection rate are m6 into liquid blending tank 5 by the 4th filling pipe, Wherein m6=M5-m3；After the completion of water filling, second flow control valve 9-2 is closed；Treat that mesh is injected in institute's water filling in liquid blending tank 5 Mark after thick oil reservoir residing for well 8, complete initiator slug process.

In the present embodiment, in step 301 after the completion of heat generating agent slug, the 4th check valve 10-4 is first opened, first is turned off Check valve 10-1, during do not need termination of pumping, and observe the level change of the initiator solution after being dissolved in liquid blending tank 5, When initiator solution after being dissolved in liquid blending tank 5 will have been noted, the 4th flow control valve 9-4 is opened, observation the 4th is flowed Amount detection unit 11-4 institutes detection stream value, by the 4th filling pipe, into liquid blending tank 5, water filling and water injection rate are m6, note Persistently it is stirred during water, untill initiator solution injects in liquid blending tank 5.

In step 302 after the completion of initiator slug, the 3rd check valve 10-3 is first opened, the first check valve 10-1 is turned off, During do not need termination of pumping, insulating liquid is injected residing for target well 8 in thick oil reservoir.

In the present embodiment, remaining implantation step and injection control parameter are same as Example 1.

Embodiment 3

In the present embodiment, as shown in figure 3, as different from Example 1：The temperature T of thick oil reservoir residing for the target well 8 120 ° of ＞, according to the method described in step 201 to step 204, is stored up using viscous crude residing for heat extraction by steam injection mode to target well 8 The chemical spontaneous hot system of injection in layer, process is as follows：

Step 204, opening well and making production.

When carrying out steam preheating slug in step 201, according to conventional cyclic steam stimulation method, to viscous crude residing for target well 8 280 tons~320 tons steam of injection in reservoir；When carrying out stewing well in step 203, according to conventional cyclic steam stimulation method, by target Well 8 boils in a covered pot over a slow fire well 3d~7d.In the present embodiment, when carrying out steam preheating slug in step 201, to residing for target well 8 in thick oil reservoir Inject 300 tons of steam., can according to specific needs when actual use, the injection rate to steam is adjusted.Wherein, 1 ton of steam Volume is 150000 cubic metres~160000 cubic metres.

In the present embodiment, to when injecting 280 tons~320 tons of steam in thick oil reservoir residing for target well 8, injected using steam Equipment and injected by gas injection pipeline.

Boil in a covered pot over a slow fire during well, continued by gas injection pipeline to injecting steam in thick oil reservoir residing for target well 8 in step 203.

It is described above, only it is presently preferred embodiments of the present invention, not the present invention is imposed any restrictions, it is every according to the present invention Any simple modification, change and equivalent structure change that technical spirit is made to above example, still fall within skill of the present invention In the protection domain of art scheme.

Claims

1. chemical Self-heating system injection technology in a kind of thick oil reservoir, it is characterised in that：Mode or steam injection heat are adopted using cold Adopt the chemical spontaneous hot system of injection in thick oil reservoir residing for mode to target well (8)；The chemical spontaneous hot system includes heat Agent and triggering agent and it is alkaline spontaneous hot system or acid spontaneous hot system, the heat generating agent is not more than 400 mesh including granularity Work ripple metallic particles and clad for wrapping up ripple metallic particles living；The work ripple metallic particles of the alkaline spontaneous hot system For aluminium powder, for wrapping up the clad of aluminium powder for paraffin clad or aluminum stearate clad, the alkaline spontaneous hot system Triggering agent is NaOH powder, and the mass ratio of aluminium powder and NaOH powder is 1 ︰ (1.0~2.5)；The work of the acid spontaneous hot system Ripple metallic particles is magnesium powder, and the clad for wrapping up magnesium powder is paraffin clad or magnesium stearate clad, and the acidity is certainly The triggering agent of heat system is P₂O₅Powder, magnesium powder and P₂O₅The mass ratio of powder is 1 ︰ (1.0~2.0)；The injection chemistry is certainly Before heat system, the acid-base property of the first thick oil reservoir according to residing for target well (8), to the type of injected chemical spontaneous hot system It is determined：When thick oil reservoir residing for target well (8) is acidity, it is alkaline Self-heating body to inject chemical spontaneous hot system System；When thick oil reservoir residing for target well (8) is alkalescence, chemical spontaneous hot system is injected for acid spontaneous hot system；

Wherein, using it is cold adopt inject chemical spontaneous hot system in thick oil reservoir residing for mode to target well (8) when, process is as follows：

Step 101, heat generating agent slug：The heat generating agent suspension prepared in advance is injected residing for target well (8) in thick oil reservoir；

The heat generating agent suspension is heat in the suspension being uniformly mixed to form by heat generating agent and water, the heat generating agent suspension The mass percent concentration of agent is 28%~35%；The injection rate of heat generating agent suspension viscous crude according to residing for target well (8) Reservoir temperature lifting institute calorific requirement is determined；

Step 102, spacer slug：The insulating liquid prepared in advance is injected residing for target well (8) in thick oil reservoir；

The injection rate of the insulating liquid is the 35%~40% of the wellbore volume of target well (8)；

Step 103, triggering agent slug：The triggering agent solution prepared in advance is injected residing for target well (8) in thick oil reservoir, institute State the quality percentage that triggering agent solution is triggering agent in the solution being uniformly mixed to form by triggering agent and water, the triggering agent solution Specific concentration is not less than 40%；

Injection rate injection rate of heat generating agent suspension according to step 101 of the triggering agent solution, the heat generating agent hang Mass ratio of the ripple metallic particles living with triggering agent in the mass percent concentration of heat generating agent, the chemical spontaneous hot system in supernatant liquid It is determined with the mass percent concentration of triggering agent in the triggering agent solution；

Step 104, displacement fluid slug：The displacement fluid prepared in advance is injected residing for target well (8) in thick oil reservoir；

The injection rate of the displacement fluid is the 60%~65% of the wellbore volume of target well (8)；

Insulating liquid is aqueous surfactant solution described in the displacement fluid and step 102, the aqueous surfactant solution The mass concentration of middle surfactant is 0.12%~0.18%；

Step 105, closing well：By target well (8) closing well 60h~80h；

Step 106, opening well and making production；

During using injecting chemical spontaneous hot system in thick oil reservoir residing for heat extraction by steam injection mode to target well (8), process is as follows：

Step 201, steam preheating slug：280 tons~320 tons steam of injection in thick oil reservoir residing for target well (8), to target Thick oil reservoir residing for well (8) is preheated；

Step 202, according to described in step 101 to step 104 the step of, by elder generation to rear completion heat generating agent slug, insulating liquid section Plug, triggering agent slug and displacement fluid slug process；

Step 203, stewing well：Target well (8) is boiled in a covered pot over a slow fire into well 3d~7d；

Step 204, opening well and making production.

2. according to chemical Self-heating system injection technology in the thick oil reservoir described in claim 1, it is characterised in that：Step 201 During middle progress steam preheating slug, according to conventional cyclic steam stimulation method, to the interior injection 280 of thick oil reservoir residing for target well (8) Ton~320 tons of steam；When carrying out stewing well in step 203, according to conventional cyclic steam stimulation method, by target well (8) boil in a covered pot over a slow fire well 3d~ 7d。

3. according to chemical Self-heating system injection technology in the thick oil reservoir described in claim 1 or 2, it is characterised in that：Step Carried out in 101 before heat generating agent slug, need first to add thickener into the heat generating agent suspension and stir, per 1m³It is raw Thermit powder suspension adds 1.8g~2.6g thickeners；When carrying out heat generating agent slug in step 101, the heat after thickener will be added Residing for agent suspension injection target well (8) in thick oil reservoir.

4. according to chemical Self-heating system injection technology in the thick oil reservoir described in claim 3, it is characterised in that：The thickening Agent is hydroxyethyl cellulose.

5. according to chemical Self-heating system injection technology in the thick oil reservoir described in claim 1 or 2, it is characterised in that：Injection Before the chemical spontaneous hot system, first the temperature T of thick oil reservoir residing for target well (8) is tested：When 60 ° of ＜ T≤ At 120 °, the step of according to described in step 101 to step 106, adopted using cold residing for mode to target well (8) in thick oil reservoir Inject chemical spontaneous hot system；As 120 ° of T ＞, the step of according to described in step 201 to step 204, using steam injection heat Adopt the chemical spontaneous hot system of injection in thick oil reservoir residing for mode to target well (8)；When T≤60 °, using cold mode of adopting to mesh Mark and inject chemical spontaneous hot system residing for well (8) in thick oil reservoir, process is as follows：

Step 301, heat generating agent slug：The step of according to described in step 101, complete heat generating agent slug process；

Step 302, initiator slug：The initiator solution prepared in advance is injected residing for target well (8) in thick oil reservoir；Institute State the mass concentration that initiator solution is initiator in the solution being uniformly mixed to form by initiator and water, the initiator solution For 35kg/m³~45kg/m³；

The injection rate of the initiator solution is 0.5m³~1.8m³；

Step 303, according to described in step 102 to step 104 the step of, by elder generation to it is rear completion spacer slug, triggering agent section Plug and displacement fluid slug process；

Step 304, closing well：By target well (8) closing well 60h~80h；

Step 305, opening well and making production.

6. according to chemical Self-heating system injection technology in the thick oil reservoir described in claim 5, it is characterised in that：Step 302 Described in initiator be ammonium persulfate or potassium peroxydisulfate.

7. according to chemical Self-heating system injection technology in the thick oil reservoir described in claim 5, it is characterised in that：Adopted using cold When injecting chemical spontaneous hot system in thick oil reservoir residing for mode or heat extraction by steam injection mode to target well (8), using Self-heating System injection device injects；

The spontaneous hot system injection device includes four apparatus for combining liquids and a note being connected with the pit shaft of target well (8) Liquid pipe (14), the inlet of four apparatus for combining liquids is connected by a filling pipe with water injection equipment (1) respectively, and four The liquid outlet of the individual apparatus for combining liquids is connected by a liquid-transport pipe-line with liquid injection pipe (14) respectively, the liquid injection pipe (14) It is upper that plunger pump (7), pressure sensing cell and the 5th check valve (10-5) are housed；Flow is mounted on each filling pipe Check valve is mounted on control valve and flow detection unit, each liquid-transport pipe-line；

Four apparatus for combining liquids include three liquid mixing pits and a liquid blending tank (5), the liquid blending tank (5) and in three liquid mixing pits it is respectively arranged with agitating device；Three liquid mixing pits are respectively to institute in step 101 State the first liquid mixing pit (2) that heat generating agent suspension mixed, mixed to triggering agent solution described in step 103 Close the second liquid mixing pit (3) of stirring and to being mixed in step 102 with aqueous surfactant solution described in step 104 3rd liquid mixing pit (4) of stirring；It is connected to water injection equipment (1) and the first liquid mixing pit (2), second liquid mixing pit (3), the filling pipe between the 3rd liquid mixing pit (4) and liquid blending tank (5) is respectively the first filling pipe, the second water filling The flow control valve and flow detection installed on pipeline, the 3rd filling pipe and the 4th filling pipe, first filling pipe Unit is respectively to be installed on first flow control valve (9-1) and first flow detection unit (11-1), second filling pipe Flow control valve and flow detection unit be respectively second flow control valve (9-2) and second flow detection unit (11-2), The flow control valve and flow detection unit installed on 3rd filling pipe are respectively the 3rd flow control valve (9-3) and The flow control valve and flow detection unit installed on three flow detection units (11-3), the 4th filling pipe are respectively Four flow control valves (9-4) and the 4th flow detection unit (11-4)；First liquid mixing pit (2), second liquid mixing pit (3), the 3rd liquid mixing pit (4) and the liquid-transport pipe-line of liquid blending tank (5) connection are respectively the first liquid-transport pipe-line, the second transfusion Pipeline, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and The check valve installed on 4th liquid-transport pipe-line is respectively the first check valve (10-1), the second check valve (10-2), the 3rd check valve (10-3) and the 4th check valve (10-4)；

Inject before the chemical spontaneous hot system, installed on the 5th check valve (10-5), each filling pipe The check valve installed on flow control valve and each liquid-transport pipe-line is in closed mode.

8. according to chemical Self-heating system injection technology in the thick oil reservoir described in claim 7, it is characterised in that：Step 101 Before middle progress heat generating agent slug, need first to add thickener into the heat generating agent suspension and stir, per 1m³Heat generating agent Suspension adds 1.8g~2.6g thickeners；When carrying out heat generating agent slug in step 101, the heat generating agent added after thickener is hanged Residing for supernatant liquid injection target well (8) in thick oil reservoir；

Inject before the chemical spontaneous hot system, first to described in heat generating agent suspension described in step 101, step 102 every The note of initiator solution described in triggering agent solution described in chaotropic, step 103, displacement fluid described in step 104 and step 302 Enter amount to be determined respectively, and to preparing the heat generating agent suspension, the insulating liquid, the triggering agent solution, the replacement Water consumption M1, M2, M3, M4 and M5 and the heat generating agent of liquid and the initiator solution, the triggering agent, the surface are lived The consumption of property agent, the thickener and the initiator is determined respectively；Afterwards, to the heat generating agent suspension, it is described touch Hair agent solution, the aqueous surfactant solution and the initiator solution are mixed respectively；

Wherein, when being mixed to the heat generating agent suspension, first flow control valve (9-1) is opened, passes through the first water injection pipe Road to the first liquid mixing pit (2) interior water filling and water injection rate be m1, wherein m1=(85%~90%) × M1；After the completion of water filling, Close first flow control valve (9-1)；Further according to the consumption of the thickener of determination, the thickener is added into the first liquid Mixing pit (2) is interior and stirs；Afterwards, according to the consumption of the heat generating agent of determination, the heat generating agent is added into the first liquid Body mixing pit (2) is interior and stirs, until adding heat generating agent is in suspended state, obtains the heat generating agent after addition thickener and hangs Supernatant liquid；

When being mixed to the triggering agent solution, opening second flow control valve (9-2), by the second filling pipe to second Liquid mixing pit (3) interior water filling and water injection rate are m2, wherein m2=(85%~90%) × M3；After the completion of water filling, second is closed Flow control valve (9-2)；Further according to the consumption of the triggering agent of determination, the triggering agent is added into second liquid mixing pit (3) in and stir, until add trigger agent be completely dissolved, the triggering agent solution after being dissolved；

When being mixed to the aqueous surfactant solution, according to the water consumption of the insulating liquid of determination and the displacement fluid M2 and M4, opens the 3rd flow control valve (9-3), by the 3rd filling pipe to the 3rd liquid mixing pit (4) interior water filling；Water filling After the completion of, close the 3rd flow control valve (9-3)；Further according to the consumption of the surfactant of determination, the surface is lived Property agent add in the 3rd liquid mixing pit (4) and stir, obtain the aqueous surfactant solution；

When being mixed to the initiator solution, the 4th flow control valve (9-4) is opened, by the 4th filling pipe to liquid Blending tank (5) interior water filling and water injection rate are m3, wherein m3=(85%~90%) × M5；After the completion of water filling, the 4th flow is closed Control valve (9-4)；Further according to the consumption of the initiator of determination, the initiator is added in liquid blending tank (5) and stirred Mix uniform, be completely dissolved until adding initiator, the initiator solution after being dissolved；

Treat that the heat generating agent suspension, the triggering agent solution, the aqueous surfactant solution and the initiator solution are equal After the completion of mixing, start plunger pump (7) and inject the chemical spontaneous hot system；In the chemical spontaneous hot system injection process, The plunger pump (7) continuously works；

When carrying out heat generating agent slug in step 101, the first check valve (10-1) is opened, will be added in the first liquid mixing pit (2) Thick oil reservoir residing for heat generating agent suspension injection target well (8) after thickener；Addition increases in the first liquid mixing pit (2) When heat generating agent suspension after thick dose will have been noted, first flow control valve (9-1) is opened, by the first filling pipe to first Liquid mixing pit (2) interior water filling and water injection rate are m4, wherein m4=M1-m1；After the completion of water filling, first flow control valve is closed (9-1)；After thick oil reservoir residing for target well (8) is injected in the first interior institute's water filling of liquid mixing pit (2), heat generating agent slug is completed Process；

When step 103 carries out triggering agent slug, the second check valve (10-2) is opened, after being dissolved in second liquid mixing pit (3) Triggering agent solution injection target well (8) residing for thick oil reservoir；Triggering agent after being dissolved in the second liquid mixing pit (3) is molten When liquid will have been noted, second flow control valve (9-2) is opened, is noted by the second filling pipe into second liquid mixing pit (3) Water and water injection rate are m5, wherein m5=M3-m2；After the completion of water filling, second flow control valve (9-2) is closed；Treat that second liquid is mixed Close pond (3) interior institute's water filling to inject after thick oil reservoir residing for target well (8), complete triggering agent slug process；

When carrying out initiator slug in step 302, the 4th check valve (10-4) is opened, after being dissolved in liquid blending tank (5) Thick oil reservoir residing for initiator solution injection target well (8)；Initiator solution after being dissolved in the liquid blending tank (5) will When having noted, the 4th flow control valve (9-4) is opened, by the 4th filling pipe to liquid blending tank (5) interior water filling and water injection rate For m6, wherein m6=M5-m3；After the completion of water filling, second flow control valve (9-2) is closed；Treat the interior institute's water filling of liquid blending tank (5) After thick oil reservoir residing for injection target well (8), initiator slug process is completed.

9. a kind of chemical spontaneous hot system injection technology injection device as claimed in claim 1, it is characterised in that：Including four Apparatus for combining liquids and a liquid injection pipe (14) being connected with the pit shaft of target well (8), four apparatus for combining liquids enter Liquid mouthful is connected by a filling pipe with water injection equipment (1) respectively, and the liquid outlet of four apparatus for combining liquids leads to respectively Cross a liquid-transport pipe-line to be connected with liquid injection pipe (14), equipped with plunger pump (7), pressure sensing cell and the on the liquid injection pipe (14) Five check valves (10-5)；Flow control valve and flow detection unit are mounted on each filling pipe, it is each described defeated Liquid pipe is mounted on check valve on road；

Four apparatus for combining liquids include three liquid mixing pits and a liquid blending tank (5), the liquid blending tank (5) and in three liquid mixing pits it is respectively arranged with agitating device；Three liquid mixing pits are respectively to institute in step 101 State the first liquid mixing pit (2) that heat generating agent suspension mixed, mixed to triggering agent solution described in step 103 Close the second liquid mixing pit (3) of stirring and to being mixed in step 102 with aqueous surfactant solution described in step 104 3rd liquid mixing pit (4) of stirring；It is connected to water injection equipment (1) and the first liquid mixing pit (2), second liquid mixing pit (3), the filling pipe between the 3rd liquid mixing pit (4) and liquid blending tank (5) is respectively the first filling pipe, the second water filling The flow control valve and flow detection installed on pipeline, the 3rd filling pipe and the 4th filling pipe, first filling pipe Unit is respectively to be installed on first flow control valve (9-1) and first flow detection unit (11-1), second filling pipe Flow control valve and flow detection unit be respectively second flow control valve (9-2) and second flow detection unit (11-2), The flow control valve and flow detection unit installed on 3rd filling pipe are respectively the 3rd flow control valve (9-3) and The flow control valve and flow detection unit installed on three flow detection units (11-3), the 4th filling pipe are respectively Four flow control valves (9-4) and the 4th flow detection unit (11-4)；First liquid mixing pit (2), second liquid mixing pit (3), the 3rd liquid mixing pit (4) and the liquid-transport pipe-line of liquid blending tank (5) connection are respectively the first liquid-transport pipe-line, the second transfusion Pipeline, the 3rd liquid-transport pipe-line and the 4th liquid-transport pipe-line, first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line and The check valve installed on 4th liquid-transport pipe-line is respectively the first check valve (10-1), the second check valve (10-2), the 3rd check valve (10-3) and the 4th check valve (10-4).

10. according to the injection device described in claim 9, it is characterised in that：Also include the first current divider (13) and the second shunting Device (6), first current divider (13) includes first water inlet and multiple second delivery ports, and the second current divider (6) includes Multiple second water inlets and first delivery port；The delivery port of the water injection equipment (1) is shunted by connecting pipe and first The first water inlet connection of device (13), four second delivery ports of first current divider (13) pass through the first water filling respectively The inlet of pipeline, the second filling pipe, the 3rd filling pipe and the 4th filling pipe and four apparatus for combining liquids connects Connect；The liquid outlet of four apparatus for combining liquids passes through the first liquid-transport pipe-line, the second liquid-transport pipe-line, the 3rd liquid-transport pipe-line respectively It is connected with the 4th liquid-transport pipe-line with four second water inlets of the second current divider (6), the first of second current divider (6) Delivery port is connected with liquid injection pipe (14).