US20150027697A1 - System and method for producing methane from a methane hydrate formation - Google Patents
System and method for producing methane from a methane hydrate formation Download PDFInfo
- Publication number
- US20150027697A1 US20150027697A1 US13/952,266 US201313952266A US2015027697A1 US 20150027697 A1 US20150027697 A1 US 20150027697A1 US 201313952266 A US201313952266 A US 201313952266A US 2015027697 A1 US2015027697 A1 US 2015027697A1
- Authority
- US
- United States
- Prior art keywords
- methane
- borehole
- string
- methane hydrate
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0099—Equipment or details not covered by groups E21B15/00 - E21B40/00 specially adapted for drilling for or production of natural hydrate or clathrate gas reservoirs; Drilling through or monitoring of formations containing gas hydrates or clathrates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/128—Adaptation of pump systems with down-hole electric drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2401—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection by means of electricity
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2406—Steam assisted gravity drainage [SAGD]
Abstract
A completion system includes a first borehole structure having a first section formed proximate to a volume of methane hydrate located at a subsurface location. A second borehole structure has a second section formed proximate to the volume of methane hydrate, the first section positioned deeper than the second section with respect to gravity. A first string is positioned in the first borehole structure and arranged to convey a heat-bearing fluid through the first string into contact with a volume of methane hydrate in order to liberate methane from the methane hydrate. A second string is positioned in the second borehole structure and arranged to produce the methane.
Description
- Methane hydrate is a clathrate compound in which water molecules freeze about methane molecules to form “cages” that trap the methane molecules therein. Methane hydrate deposits are believed to represent significant potential energy reserves for the energy industry but are difficult to recover. Due to the specific pressure and temperature requirements for the formation of methane hydrate, these deposits are primarily formed underground in subsea and arctic locations, frustrating their recovery. The industry eagerly receives new systems for producing methane from a methane hydrate formation.
- A completion system includes a first borehole structure having a first section formed proximate to a volume of methane hydrate located at a subsurface location. A second borehole structure has a second section formed proximate to the volume of methane hydrate, the first section positioned deeper than the second section with respect to gravity. A first string is positioned in the first borehole structure and arranged to convey a heat-bearing fluid through the first string into contact with a volume of methane hydrate in order to liberate methane from the methane hydrate. A second string is positioned in the second borehole structure and arranged to produce the methane.
- A method for producing methane from methane hydrate includes conveying a heat bearing fluid to a formation containing methane hydrate through a first borehole section located deeper than a second borehole section relative to gravity, liberating methane from the methane hydrate, and receiving the methane in the second borehole section.
- A method for producing methane hydrate includes controlling at least one parameter of methane hydrate stability so as to destabilize the methane hydrate, and liberating methane from the methane hydrate pursuant to the destabilization.
- The following descriptions should not be considered limiting in any way. With reference to the accompanying drawings, like elements are numbered alike:
-
FIG. 1 is a cross-sectional view of a completion system for producing methane from a methane hydrate formation according to one embodiment disclosed herein; and -
FIG. 2 is a cross-sectional view of a completion system for producing methane from a methane hydrate formation according to another embodiment disclosed herein. - A detailed description of one or more embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.
- A
completion system 10 is shown inFIG. 1 for amulti-lateral borehole 12. Theborehole 12 includes a first lateral 14 and a second lateral 16 that in the illustration are highly deviated. It is to be understood that the laterals might be less deviated or could be provided by entirely separate wellbores in related embodiments (discussed further in connection withFIG. 2 hereunder). Afirst string 18 extends into the first lateral 14 and asecond string 20 extends into the second lateral 16. It is noted however, that while a single parent borehole is shown for the two laterals, the methodology for recovery described herein can utilize two independent proximately spaced boreholes with equal effect. - The
laterals 14 and 16 are formed at least partially in, through, or otherwise proximate to asubsurface volume 22, which at least partially comprises methane hydrate. It is to be appreciated that thevolume 22 can include any number of other substances, e.g., sand, sediment, other gases, liquids, solids, etc. Thevolume 22 might be located at a subsea or arctic location, or any other location satisfying the unique temperature and pressure requirements that support the initial formation of methane hydrate as a deposit. - The
first string 18 is arranged to convey a heat-bearing fluid into contact with thevolume 22 or to simply convey heat to thevolume 22 convectively, conductively or radiantly by supplying a heat generating device such as an electric heater (or similar) in thefirst string 18. The terms “heat-bearing fluid” mean a fluid that is at a temperature greater than that of the methane hydrate, or a fluid carrying energy, e.g., chemical energy, that can be used to heat thevolume 22. For example, in one embodiment, the heat-bearing fluid is arranged to trigger or undergo an exothermic reaction, e.g., upon contact with another fluid or substance delivered or available downhole or by facilitating reaction between one or more substances delivered to the formation environment. In another embodiment, the heat-bearing fluid is steam that is produced by heating water. Heaters or heating elements may in some embodiments be included at surface, or within thestring 18. The heat-bearing fluid and/or the heat supplied from the heat-bearing fluid is indicated by a set of arrows 24 emanating from thefirst string 18. In some embodiments, thefirst string 18 is equipped withports 26, perforations, or other openings for permitting the heat-bearing fluid to be pumped into contact with thevolume 22 while in other embodiments, the string may only be arranged to conductively transmit the heat of the fluid rather than the fluid itself to the formation. - The application of heat to the
volume 22 will cause ice in thevolume 22 to melt, thereby enabling methane to be liberated from the cage of previously frozen water molecules. The liberated methane is indicated by a set of arrows and designated with thenumeral 28. By “liberated”, it is meant that the methane is released from the methane hydrate in thevolume 22, is no longer trapped, contained, or restricted by the frozen water molecules of the methane hydrate, or otherwise is able to move in order for the methane to be produced. Thesecond string 20 is accordingly arranged to receive themethane 28 that is liberated from the methane hydrate in thevolume 22. Thesecond string 20 can be provided with ports, perforations, or other openings with or withoutscreens 29 in order to permit entry of themethane 28 into thesecond string 20 for production of themethane 28. In addition, in some embodiments, the second string will also include one or more ESPs 31 (Electric Submersible Pump) to assist in pumping the liberated fluid uphole and somewhat incidentally to produce some amount of heat that will help reduce the chances of a hydrate plug forming uphole of the formation. - In view of the above, it is to be appreciated that the functions of supplying heat and producing the
methane 28 are divided between thestrings strings system 10 can be arranged to more efficiently control the parameters relevant to the formation of methane hydrate, e.g., temperature and pressure. - Utilizing two separate strings in the
system 10 enables thefirst string 18, as illustrated, to be located deeper than and/or or below thesecond string 20 with respect to gravity. This arrangement promotes the efficient production of methane in a variety of ways. That is, for example, while the heat will generally act in all directions and form a pocket or envelop around thestring 18, the positioning of thefirst string 18 deeper than thesecond string 20 will enable the natural tendency of heated fluids to rise, i.e., travel opposite to the direction of gravity, (e.g., by lowering the density of fluids as they are heated) to primarily direct the heat from thestring 18 into thevolume 22. It will however be understood that thesecond string 20 could be otherwise located providing that the envelope of heat and hence liberated methane will have access to thestring 20 to promote production. In one embodiment, thefirst string 18 is arranged with openings on only the side directed toward thesecond string 20. Additionally, the relatively low density methane will tend to “rise above” water and other heavier molecules, causing themethane 28 to move opposite to the direction of gravity and into thestring 20. It is also noted that sand, sediment, and other solid particles initially trapped in or with thevolume 22 or surrounding ice will tend to move in the direction of gravity and settle about thestring 18 hence being left behind instead of blocking the progress of themethane 28 into thestring 20. - In the illustrated embodiment, the
string 18 is arranged with aninstrumentation line 30 and thestring 20 is arranged with aninstrumentation line 32. Theinstrumentation lines system 10 and can include fiber optic lines, chemical injection lines, hydraulic control lines, or other power and/or data communication lines. Thelines string 18 can be tailored in response to changing downhole conditions. Also importantly, the conditions within thestring 20 can be controlled in order to prevent methane hydrate from reforming and/or water molecules refreezing therein. That is, for example, the heat provided by thestring 18 will keep thevolume 22 and surrounding system components from freezing, but themethane 28 and other fluids produced by thestring 20 may cool significantly while traveling through thestring 20. For this reason, in some embodiments, thestring 20 may be equipped with heaters along its length, and/or pumps or other mechanisms for depressurizing the string, as needed, to prevent the formation of methane hydrate or ice plugs within thestring 20. - The
system 10 also includes one ormore valves 34 to assist in heating thevolume 22 in a controlled manner. For example, each of thevalves 34 can be arranged to selectively enable the heat-bearing fluid to flow therethrough. In one embodiment, thevalves 34 each include asleeve 36 that is shiftable to uncover one ormore ports 26 to provide fluid communication to thevolume 22. By controlling operation of the valves, the heat flow into thevolume 22 can be influenced by injecting the heat-bearing fluid at only desired locations, setting the mass flow rate of heat-bearing fluid into thevolume 22, etc. - It is to be appreciated that the
laterals 14 and 16 represent one example of suitable borehole structures in which to install the first andsecond strings system 110 is illustrated inFIG. 2 in which the borehole structures for containing the first andsecond strings numerals system 110 can be used in essentially the same manner as described above with respect to thesystem 10, and can include any or all of the components described above, e.g., theinstrumentation lines valves 134,screens 129, etc. in each case the numerals have been modified by the addition of a one hundred series character in the front thereof - The system as described enables the method of producing Methane from Methane hydrate enabling conveying a heat bearing fluid to a formation containing methane hydrate through a first borehole section located deeper than a second borehole section relative to gravity; liberating methane from the methane hydrate; and receiving the methane in the second borehole section. But further, the system lends itself to controlling any one or more parameters of methane hydrate stability, any one of which being capable of causing a destabilizing effect that results in the liberation of Methane from the hydrate form. This includes not only the heat as described above but also other means for destabilizing methane hydrate such as chemistry of environment and/or pressure.
- While the invention has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the claims. Also, in the drawings and the description, there have been disclosed exemplary embodiments of the invention and, although specific terms may have been employed, they are unless otherwise stated used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention therefore not being so limited. Moreover, the use of the terms first, second, etc. do not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another. Furthermore, the use of the terms a, an, etc. do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.
Claims (21)
1. A completion system, comprising:
a first borehole structure having a first section formed proximate to a volume of methane hydrate located at a subsurface location;
a second borehole structure having a second section formed proximate to the volume of methane hydrate, the first section positioned deeper than the second section with respect to gravity;
a first string positioned in the first borehole structure and arranged to convey a heat-bearing fluid through the first string into contact with a volume of methane hydrate in order to liberate methane from the methane hydrate; and
a second string positioned in the second borehole structure and arranged to produce the methane.
2. The system of claim 1 , wherein the first and second borehole structures comprise a first lateral and a second lateral of a multi-lateral borehole.
3. The system of claim 1 , wherein the first and second borehole structures comprise a first borehole and a second borehole separate from the first borehole.
4. The system of claim 1 , wherein the heat-bearing fluid includes steam.
5. The system of claim 1 , wherein the heat-bearing fluid comprises one or more components productive of an exothermic reaction.
6. The system of claim 1 , wherein the second string includes one or more screen assemblies that enable entry of the methane into the second string.
7. The system of claim 1 , further comprising one or more instrumentation lines disposed in the first string, the second string, or a combination including at least one of the foregoing.
8. The system of claim 7 , wherein the one or more instrumentation lines are arranged to enable one or more parameters related to formation of the methane hydrate to be sensed.
9. The system of claim 8 , wherein the one or more parameters include temperature, pressure, or a combination including at least one of the foregoing.
10. The system of claim 1 , wherein the system further comprises means to control at least one parameter of methane hydrate other than heat.
11. The system of claim 1 , wherein the first string comprises one or more valves for selectively controlling communication of the heat-bearing fluid with the volume.
12. The system of claim 1 , further comprising one or more Electric Submersible Pumps.
13. A method for producing methane from methane hydrate comprising:
conveying a heat bearing fluid to a formation containing methane hydrate through a first borehole section located deeper than a second borehole section relative to gravity;
liberating methane from the methane hydrate; and
receiving the methane in the second borehole section.
14. The method of claim 13 wherein the collecting includes selectively leaving behind constituents of the liberation of methane that are not methane.
15. The method of claim 14 wherein the selectively is by gravity.
16. The method of claim 13 wherein the method further includes heating the produced methane in other locations of the borehole than the section.
17. The method of claim 13 wherein the heat-bearing fluid includes steam.
18. The method of claim 13 wherein the heat-bearing fluid comprises components productive of an exothermic reaction.
19. A method for producing methane hydrate comprising:
controlling at least one parameter of methane hydrate stability so as to destabilize the methane hydrate;
liberating methane from the methane hydrate pursuant to the destabilization.
20. The method of claim 19 further comprising controlling one or more additional parameters of methane hydrate stability.
21. The method of claim 20 wherein the one or more additional parameters include chemistry of environment and pressure.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/952,266 US20150027697A1 (en) | 2013-07-26 | 2013-07-26 | System and method for producing methane from a methane hydrate formation |
PCT/US2014/044059 WO2015012995A1 (en) | 2013-07-26 | 2014-06-25 | System and method for producing methane from a methane hydrate formation |
JP2016529773A JP2016529420A (en) | 2013-07-26 | 2014-06-25 | System and method for producing methane from a formation containing methane hydrate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/952,266 US20150027697A1 (en) | 2013-07-26 | 2013-07-26 | System and method for producing methane from a methane hydrate formation |
Publications (1)
Publication Number | Publication Date |
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US20150027697A1 true US20150027697A1 (en) | 2015-01-29 |
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ID=52389490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/952,266 Abandoned US20150027697A1 (en) | 2013-07-26 | 2013-07-26 | System and method for producing methane from a methane hydrate formation |
Country Status (3)
Country | Link |
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US (1) | US20150027697A1 (en) |
JP (1) | JP2016529420A (en) |
WO (1) | WO2015012995A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150047850A1 (en) * | 2013-08-15 | 2015-02-19 | Baker Hughes Incorporated | System for gas hydrate production and method thereof |
CN105041271A (en) * | 2015-07-29 | 2015-11-11 | 大连理工大学 | Decompression marine natural gas hydrate mining method and submarine mining system |
CN109763794A (en) * | 2018-12-10 | 2019-05-17 | 青岛海洋地质研究所 | Ocean hydrate multi-branched horizontal well decompression heating connection mining method |
CN115929261A (en) * | 2023-01-30 | 2023-04-07 | 中国矿业大学 | Marine natural gas hydrate multi-row horizontal well layered mining device and method |
CN115929258A (en) * | 2023-02-23 | 2023-04-07 | 中国石油大学(华东) | Hydrate exploitation method for methane solubilization-assisted depressurization |
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CN105672967B (en) * | 2016-03-16 | 2018-09-04 | 中国石油天然气股份有限公司 | The tubing string and its oil production method of SAGD dual horizontal wells |
CN108505977B (en) * | 2018-04-18 | 2020-04-21 | 吉林大学 | Method for exploiting natural gas hydrate by using sleeve type heater |
CN109057757B (en) * | 2018-08-24 | 2019-12-24 | 广州海洋地质调查局 | Natural gas hydrate exploitation method and device |
CN115726742B (en) | 2022-12-20 | 2023-07-21 | 西南石油大学 | Multi-source multi-method combined exploitation system and method for natural gas hydrate, shallow gas and deep gas |
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US9322250B2 (en) * | 2013-08-15 | 2016-04-26 | Baker Hughes Incorporated | System for gas hydrate production and method thereof |
CN105041271A (en) * | 2015-07-29 | 2015-11-11 | 大连理工大学 | Decompression marine natural gas hydrate mining method and submarine mining system |
CN109763794A (en) * | 2018-12-10 | 2019-05-17 | 青岛海洋地质研究所 | Ocean hydrate multi-branched horizontal well decompression heating connection mining method |
CN115929261A (en) * | 2023-01-30 | 2023-04-07 | 中国矿业大学 | Marine natural gas hydrate multi-row horizontal well layered mining device and method |
CN115929258A (en) * | 2023-02-23 | 2023-04-07 | 中国石油大学(华东) | Hydrate exploitation method for methane solubilization-assisted depressurization |
Also Published As
Publication number | Publication date |
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WO2015012995A1 (en) | 2015-01-29 |
JP2016529420A (en) | 2016-09-23 |
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