CN105863589A - Method for vertical shaft electric-heating-assisted depressurizing production of natural gas hydrate reservoir - Google Patents
Method for vertical shaft electric-heating-assisted depressurizing production of natural gas hydrate reservoir Download PDFInfo
- Publication number
- CN105863589A CN105863589A CN201610285738.6A CN201610285738A CN105863589A CN 105863589 A CN105863589 A CN 105863589A CN 201610285738 A CN201610285738 A CN 201610285738A CN 105863589 A CN105863589 A CN 105863589A
- Authority
- CN
- China
- Prior art keywords
- gas
- exploitation
- gas hydrates
- natural gas
- gas hydrate
- 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.)
- Granted
Links
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
- E21B43/2401—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection by means of electricity
Abstract
The invention discloses a method for vertical shaft electric-heating-assisted depressurizing production of a natural gas hydrate reservoir. An electrode is mounted at the lower end of an oil pipe mainly, in combination with depressurizing production of natural gas hydrates, current is forced to pass through the natural gas hydrate reservoir, a current loop is formed, thermal production of the natural gas hydrates is realized, and the recovery ratio of the natural gas hydrate reservoir is increased. The specific method comprises steps as follows: the electrode is mounted at the lower end of the oil pipe, ground electric power adjusting equipment transmits the current to the downhole electrode through a cable, the natural gas hydrates are partially decomposed through depressurizing production, water produced through decomposition of the natural gas hydrates is used as an electric conductor and the natural gas hydrate reservoir is used as a resistor for heating, and thermal production of the natural gas hydrates is realized. The method is simple in structure, energy-saving, environment-friendly and easy to control, and an effective measure is provided for development of the natural gas hydrate reservoir.
Description
Technical field
The present invention relates to the recovery method of a kind of gas hydrates, refer in particular to utilize straight well electrical heating secondary buck exploitation of gas hydrate to hide
Method.
Background technology
Gas hydrates are a kind of crystalline solids generated under conditions of high pressure low temperature by natural gas and water, are mainly distributed on bottom sediment and
A little land permafrost band.Gas hydrates distribution is wide, energy density is high, and its organic carbon content is coal, oil, three kinds of fuel total carbons of natural gas
2 times of amount, are acknowledged as one of the most promising new and effective clean energy resource, have huge Exploitation Potential.
The exploitation of gas hydrates is by destroying balancing each other of gas hydrates so that it is is decomposed into natural gas and water and exploits.Sky at present
So the recovery method of gas hydrate is broadly divided into following four big classes: blood pressure lowering extraction system, heat injection method, injecting inhibitor method and carbon dioxide replacement method.?
In above-mentioned recovery method, blood pressure lowering extraction system exploitation rate slowly, is the passive recovery method of a kind of comparison；Heat injection method needs to be hydrated to natural gas
Thing is hidden and is directly injected into hot water or steam, and economic costs is big and easily causes reservoir damage；Injecting inhibitor method environmental pollution is serious and inhibitor price is held high
Expensive；Suitable carbon dioxide air source is found in it is critical only that of carbon dioxide replacement method, and its application is more limited to.Electrical heating is utilized to tap natural gas hydration
Thing is hidden, and can convert electrical energy into the heat energy that exploitation of gas hydrate is hidden, and its equipment is simple, and capacity usage ratio is high, receives more and more attention,
But still there is no a kind of method utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide at present, seriously constrain gas hydrates exploitation
Progress.
Summary of the invention
Present invention is primarily targeted at a kind of method utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide of offer, the method can be big
Width improves the recovery ratio of gas hydrates.
The purpose of the present invention is mainly realized by the following method: electrode is arranged on oil pipe lower end, using gas hydrate dissociation produce water as leading
Electricity body, electric current passes gas hydrates, returns to formation loop, ground by ordinary steel sleeve pipe, adds as resistance using gas hydrates
Heat, it is achieved the heat exploitation of gas hydrates, specifically includes following steps:
(1) it is more than the gas hydrates of 20m according to the geologic information of gas hydrates, preferably average effective caliper, drills through a bite straight
Well, uses cased hole completion, and described sleeve pipe is stainless steel in gas hydrates section, has one section and be at the coboundary of gas hydrates
Glass steel material, forces the electric current on described gas hydrates section rustless steel sleeve pipe to pass gas hydrates, thus plays heated natural gas
The purpose that hydrate is hidden；
(2) switch board is installed on ground, and switch board is made up of power supply, electric adjustment equipment and electric brake, and wherein power supply is used for providing heated natural gas water
Alternating current needed for compound Tibetan, electric adjustment equipment is used for controlling electrical output power, installs electric brake and carry out even between power supply and electric adjustment equipment
Logical control, electric adjustment equipment uses 480V alternating current, and current frequency range is 50～60Hz, and output power range is 100～120kW；
(3) at above oil pipe end 0.5～1m, electrode is installed, for preventing electric current from directly forming loop, described oil pipe and down-hole by oil pipe
Having one section of glass fiber reinforced plastic oil pipe between electrode, described electrode is installed a catalyst, described catalyst is stainless steel, for by electrode and natural gas
Hydrate Zang Chu's is telescopic joint, makes the electric current on electrode be sent on described sleeve pipe, and described electrode passes through the cable in oil jacket annular space with described
In ground control cabinet, electric adjustment equipment connects, and described oil pipe is connected with surface separator, and the water that gas hydrate dissociation produces is gentle by described
Surface separator carries out separating treatment；
(4) according to the geological conditions of gas hydrates, pressure parameter and the heat of hiding straight well blood pressure lowering exploitation of gas hydrate tap natural gas
The critical parameters that hydrate is hidden are designed, and when exploiting including blood pressure lowering, wellbore pressure scope is 1.5～4.5MPa, and described combined floodgate critical day gas production is
500～1000m3/d, described disconnected lock critical day gas production is 1500～2000m3/d；
(5) pressure parameter hidden according to described straight well blood pressure lowering exploitation of gas hydrate, carries out blood pressure lowering exploitation to gas hydrates, until
When day gas production is less than described combined floodgate critical day gas production, blood pressure lowering exploitation terminates；
(6) electric brake in described ground control cabinet is closed, decompose the water of output as electric conductor using blood pressure lowering exploitation, make with gas hydrates
Heat for resistance, it is achieved the heat exploitation of gas hydrates, when the same day, gas production was less than disconnected lock critical day gas production, described electric brake disconnected,
Stop exploitation.
Beneficial effects of the present invention: first gas hydrates carry out blood pressure lowering exploitation, the water then produced using gas hydrate dissociation is as leading
Electricity body, compels to pass a current through gas hydrates by electrode, heats as resistance using gas hydrates, it is achieved gas hydrates
Heat exploitation, thus the recovery ratio of gas hydrates is greatly improved.The method adapts to the exploitation of various types of gas hydrates, and it is energy-conservation
Environmental protection, simple in construction, it is easily controlled, the exploitation for gas hydrates provides effective measures.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide.
Fig. 2 is pit shaft enlarged drawing.
Wherein, 1, ground control cabinet；2, electric brake；3, electric adjustment equipment；4, power supply；5, cable；6, oil pipe；7, glass fiber reinforced plastic oil pipe；
8, glass reinforced plastic sleeve；9, perforation；10, sleeve pipe；11, electrode；12, catalyst；13, gas hydrates；14, surface separator.
Detailed description of the invention
Describe the present invention in detail below in conjunction with accompanying drawing, but do not limit the practical range of the present invention.
(1) it is the gas hydrates of 30m according to the geologic information of gas hydrates, preferably average effective caliper, drills through a bite straight well,
Using sleeve pipe 10 completion, sleeve pipe 10 is stainless steel, is separated with glass reinforced plastic sleeve 8, forces natural gas at the coboundary of gas hydrates
Hydrate is hidden the electric current on section rustless steel sleeve pipe and is passed gas hydrates 13, thus plays the purpose that heated natural gas hydrate is hidden, sleeve pipe 10
Gas hydrates 13 is connected by perforation 9；
(2) installing ground control cabinet 1, switch board is made up of power supply 4, electric adjustment equipment 3 and electric brake 2, and wherein power supply 4 is used for providing heating
Alternating current needed for gas hydrates 13, electric adjustment equipment 3 is used for controlling electrical output power, at power supply 4 and electric adjustment equipment 3
Between install electric brake 2 carry out connect control, electric adjustment equipment 3 uses 480V alternating current, and power frequency is 55Hz, and output is 110kW；
(3) above distance oil pipe 6 end, at 0.5m, electrode 11 is installed, for preventing electric current from directly forming loop, described oil pipe 6 by oil pipe 6
And having one section of glass fiber reinforced plastic oil pipe 7 between Electrodes In Shallow Wells 11, described electrode 11 is installed a catalyst 12, described catalyst 12 is stainless steel,
Telescopic joint at by electrode 11 and gas hydrates 13, makes the electric current on electrode 11 be sent on described sleeve pipe, described electricity
Pole 11 is connected with electric adjustment equipment 3 in described ground control cabinet 1 by the cable 5 in oil jacket annular space, described oil pipe 6 and surface separator 14
Connecting, the water of gas hydrate dissociation generation is gentle carries out separating treatment by described surface separator 14；
(4) according to the geological conditions of gas hydrates, pressure parameter and the heat of hiding straight well blood pressure lowering exploitation of gas hydrate tap natural gas
The critical parameters that hydrate is hidden are designed, and when exploiting including blood pressure lowering, wellbore pressure is 3MPa, described combined floodgate critical day gas production 800m3/d, described
Disconnected lock critical day gas production is 1500m3/d；
(5) pressure parameter hidden according to described straight well blood pressure lowering exploitation of gas hydrate, carries out blood pressure lowering exploitation to gas hydrates, until
When day gas production is less than described combined floodgate critical day gas production, blood pressure lowering exploitation terminates；
(6) electric brake 2 in described ground control cabinet 1 is closed, using blood pressure lowering exploitation decompose output water as electric conductor, with gas hydrates
Hide 13 to heat as resistance, it is achieved the heat exploitation of gas hydrates, when the same day, gas production was less than disconnected lock critical day gas production, by described electricity
Lock 2 disconnects, and stops exploitation.
Claims (9)
1. utilizing the method that straight well electrical heating secondary buck exploitation of gas hydrate is hidden, electrode is arranged on oil pipe lower end by it, with gas water
The water that compound decomposition produces, as electric conductor, heats using gas hydrates as resistance, it is achieved the heat exploitation of gas hydrates, thus
The recovery ratio of gas hydrates is greatly improved, it is characterised in that comprise the steps:
(1) it is more than the gas hydrates of 20m according to the geologic information of gas hydrates, preferably average effective caliper, drills through a bite straight well,
Use cased hole completion；
(2) switch board is installed on ground, and switch board is made up of power supply, electric adjustment equipment and electric brake, and wherein power supply is used for providing heated natural gas to be hydrated
Alternating current needed for thing Tibetan, electric adjustment equipment is used for controlling electrical output power, installs electric brake and connect between power supply with electric adjustment equipment
Control；
(3) installing electrode at above oil pipe end 0.5～1m, electrode is installed catalyst, electrode is by cable and described ground control cabinet
Electric adjustment equipment connects；
(4) according to the geological conditions of gas hydrates, pressure parameter and the heat of hiding straight well blood pressure lowering exploitation of gas hydrate tap natural gas water
The critical parameters that compound is hidden are designed, wellbore pressure when exploiting including blood pressure lowering, the combined floodgate critical day gas production of described electric brake and disconnected lock when heat is exploited
Critical day gas production；
(5) pressure parameter hidden according to described straight well blood pressure lowering exploitation of gas hydrate, carries out blood pressure lowering exploitation to gas hydrates, adopted the same day
When tolerance is less than described combined floodgate critical day gas production, blood pressure lowering exploitation terminates；
(6) electric brake in described ground control cabinet is closed, decomposes the water of output as electric conductor using blood pressure lowering exploitation, using gas hydrates as
Resistance heats, it is achieved the heat exploitation of gas hydrates, when the same day, gas production was less than described disconnected lock critical day gas production, is disconnected by described electric brake,
Stop exploitation.
A kind of method utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide the most according to claim 1, it is characterised in that institute
Stating sleeve pipe in gas hydrates section is stainless steel, and having one section at the coboundary of gas hydrates is glass steel material, forces described
Electric current on gas hydrates section rustless steel sleeve pipe passes gas hydrates, thus plays the purpose that heated natural gas hydrate is hidden.
A kind of method utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide the most according to claim 1, it is characterised in that institute
State straight well and connect gas hydrates by well-case perforating.
A kind of method utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide the most according to claim 1, it is characterised in that institute
The electric adjustment equipment in switch board of stating uses 480V alternating current, and current frequency range is 50～60Hz, and output power range is 100～120kW.
A kind of method utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide the most according to claim 1, it is characterised in that institute
Stating oil pipe to be connected with surface separator, the water of gas hydrate dissociation generation is gentle carries out separating treatment by described surface separator.
A kind of method utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide the most according to claim 1, it is characterised in that for
Prevent electric current from directly forming loop by oil pipe, between described oil pipe and Electrodes In Shallow Wells, have one section of glass fiber reinforced plastic oil pipe.
A kind of method utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide the most according to claim 1, it is characterised in that institute
Stating catalyst is stainless steel, telescopic joint at by electrode and gas hydrates, makes the electric current on electrode be sent to described set
Guan Shang.
A kind of method utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide the most according to claim 1, it is characterised in that institute
State cable to be placed in oil jacket annular space, be connected with described electrode.
A kind of method utilizing straight well electrical heating secondary buck exploitation of gas hydrate to hide the most according to claim 1, it is characterised in that institute
When stating blood pressure lowering exploitation, wellbore pressure scope is 1.5～4.5MPa, and described combined floodgate critical day gas production is 500～1000m3/ d, described disconnected lock critical day gas production
Amount is 1500～2000m3/d。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610285738.6A CN105863589B (en) | 2016-05-03 | 2016-05-03 | A kind of method hidden using straight well electrical heating secondary buck exploitation of gas hydrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610285738.6A CN105863589B (en) | 2016-05-03 | 2016-05-03 | A kind of method hidden using straight well electrical heating secondary buck exploitation of gas hydrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105863589A true CN105863589A (en) | 2016-08-17 |
| CN105863589B CN105863589B (en) | 2017-11-17 |
Family
ID=56628970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610285738.6A Active CN105863589B (en) | 2016-05-03 | 2016-05-03 | A kind of method hidden using straight well electrical heating secondary buck exploitation of gas hydrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105863589B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487882A (en) * | 2018-02-23 | 2018-09-04 | 中国石油大学(北京) | A kind of production tree device and method for exploitation of gas hydrate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6148911A (en) * | 1999-03-30 | 2000-11-21 | Atlantic Richfield Company | Method of treating subterranean gas hydrate formations |
| CN101435328A (en) * | 2008-12-15 | 2009-05-20 | 中国地质大学（武汉） | Method and device for exploring seabed gas hydrate |
| CN103233707A (en) * | 2013-05-17 | 2013-08-07 | 中国海洋石油总公司 | Exploitation device of gas hydrate of shallow water region and exploitation method |
| CN103410488A (en) * | 2013-09-05 | 2013-11-27 | 中国石油大学(华东) | Natural gas hydrate water discharge gas production exploitation device and exploitation method of natural gas hydrate water discharge gas production exploitation device |
-
2016
- 2016-05-03 CN CN201610285738.6A patent/CN105863589B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6148911A (en) * | 1999-03-30 | 2000-11-21 | Atlantic Richfield Company | Method of treating subterranean gas hydrate formations |
| CN101435328A (en) * | 2008-12-15 | 2009-05-20 | 中国地质大学（武汉） | Method and device for exploring seabed gas hydrate |
| CN103233707A (en) * | 2013-05-17 | 2013-08-07 | 中国海洋石油总公司 | Exploitation device of gas hydrate of shallow water region and exploitation method |
| CN103410488A (en) * | 2013-09-05 | 2013-11-27 | 中国石油大学(华东) | Natural gas hydrate water discharge gas production exploitation device and exploitation method of natural gas hydrate water discharge gas production exploitation device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487882A (en) * | 2018-02-23 | 2018-09-04 | 中国石油大学(北京) | A kind of production tree device and method for exploitation of gas hydrate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105863589B (en) | 2017-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105909223A (en) | Method for electric heating assisted depressurizing production of natural gas hydrate reservoir through dual horizontal shafts | |
| CA2643380C (en) | Electro thermal energy storage for in situ recovery of fluid fuel from hydro carbonaceous earth formations | |
| AU2009303604B2 (en) | Circulated heated transfer fluid heating of subsurface hydrocarbon formations | |
| CN108487888B (en) | Auxiliary heating device and method for improving oil gas recovery ratio of oil shale in-situ exploitation | |
| CN204552720U (en) | A kind of compact reservoir microcrack expansion and reservoir firing equipment | |
| CN106640010B (en) | A kind of situ downhole fluid microwave electrical heating method and its microwave electric heater | |
| CN106761636B (en) | Vortex heater for deep oil shale in-situ exploitation | |
| US20150027722A1 (en) | Oil Well Gas Lift by Hydrogen Production Through Produced Water Electrolysis Completion | |
| CN109736763A (en) | A kind of high-temperature gas auxiliary eddy current heating device and eddy heating for heating method | |
| CN107120098A (en) | One kind utilizes CO2The well construction design and method hidden with geothermal energy exploitation of gas hydrate | |
| CN203961781U (en) | The drilling tool of a kind of down-hole microwave auxiliary rock | |
| CN107345480A (en) | A kind of method of heating oil shale reservoir | |
| CN106968644A (en) | A kind of Gas Hydrate In Sea Areas hot extractor based on thermal generator | |
| CN203223214U (en) | Coiled tubing cable electric heating device for thick oil horizontal well | |
| CN204827368U (en) | Clear wax -proof equipment of condensate gas well oil pipe outer wall | |
| CN103470223B (en) | The method and system that a kind of fossil energy low-carbon (LC) is adopted altogether | |
| CN103306654A (en) | Underground on-site electromagnetic compound heating method of oil shale | |
| CN105863589A (en) | Method for vertical shaft electric-heating-assisted depressurizing production of natural gas hydrate reservoir | |
| CN209603968U (en) | A kind of high-temperature gas auxiliary eddy current heating device | |
| CN113236211B (en) | Device and method for removing water phase trapping damage through underground eddy heat shock of tight reservoir | |
| CN216950337U (en) | Electrode heating device for metal and nonmetal solid mineral products | |
| CN215057293U (en) | Oil gas is micrite electric heat membrane heating device in pit | |
| CN103114836A (en) | Steam heavy oil thermal recovery equipment and method thereof | |
| US20100270001A1 (en) | System and method of maximizing grout heat conductibility and increasing caustic resistance | |
| CN211860586U (en) | Oil field is electromagnetic heating device in pit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Hou Jian Inventor after: Wang Wenbin Inventor after: Liu Yongge Inventor after: Du Qingjun Inventor after: Yu Bo Inventor after: Wang Yudou Inventor after: Lu Nu Inventor after: Xia Zhizeng Inventor after: Zhou Kang Inventor before: Hou Jian Inventor before: Liu Yongge Inventor before: Wang Wenbin Inventor before: Du Qingjun Inventor before: Yu Bo Inventor before: Wang Yudou Inventor before: Lu Nu Inventor before: Xia Zhizeng Inventor before: Zhou Kang |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |