CN107130944A - A kind of method that utilization fluid circulation mode employs geothermal energy exploitation of gas hydrate Tibetan - Google Patents
A kind of method that utilization fluid circulation mode employs geothermal energy exploitation of gas hydrate Tibetan Download PDFInfo
- Publication number
- CN107130944A CN107130944A CN201710573395.8A CN201710573395A CN107130944A CN 107130944 A CN107130944 A CN 107130944A CN 201710573395 A CN201710573395 A CN 201710573395A CN 107130944 A CN107130944 A CN 107130944A
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- China
- Prior art keywords
- layer
- well
- hydrate
- geothermal
- heating power
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Classifications
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- 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
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Abstract
The invention discloses a kind of method that utilization fluid circulation mode employs geothermal energy exploitation of gas hydrate Tibetan, a bite heating power well is mainly beaten through sea bottom hydrate layer and its underpart geothermal layer, injection fluid returns to hydrate Tibetan area domain after heat exchange, promote decomposition of hydrate using geothermal energy, the natural gas decomposited is produced by the horizontal perforated interval of top producing well under gravity.Its specific practice is：The concentric cast heating power well of a bite is beaten on sea through hydrate layer and its underpart geothermal layer, cold fluid is injected in well mouth oil pipe, fluid is heated after the sleeve pipe of shaft bottom by geothermal layer, and heating fluid returns to hydrate layer and provides energy for decomposition of hydrate, to aid in producing well to carry out decompression exploitation.The method that the present invention is combined using decompression and heating, its equipment is simple and convenient to operate, and economy is strong, is hidden for large scale mining hydrate and is provided guidance.
Description
Technical field
The present invention relates to a kind of method for exploiting sea bed gas hydrate, espespecially set up a bite heating power well and followed using fluid
The method that ring mode employs geothermal energy exploitation of gas hydrate Tibetan.
Background technology
With the development of economic technology, the whole world is growing day by day to the demand of the energy, particularly to oil and gas
Demand persistently increases, but conventional gas and oil resource belongs to non-renewable resources, with the continuous reduction of conventional gas and oil resource, very
Rule petroleum resources starts by extensive concern all over the world.Gas hydrates are called combustible ice, are that one kind is distributed in seabed
In deposit or land-based area permafrost, by natural gas and the molecular class ice-like solid crystalline solid of moisture.Gas hydrates
Burning only produces carbon dioxide and water, does not pollute the environment, is a kind of new green power.
The recovery method that current ocean gas hydrate is contemplated mainly has thermal excitation extraction system, decompression extraction system, chemistry
Extraction system and solids production method are injected in agent.But any of the above production technique has the limitation of its own, such as thermal excitation is exploited
Method heat loss is big, efficiency of utilization is low；Extraction system is depressured only when gas hydrates are located near temperature and pressure equilibrium boundary,
Just there is economic feasibility；It is slow and costly that chemical agent injects effect of the extraction system to gas hydrates layer.
Research shows China's South Sea sea bed gas hydrate and geothermal energy resources all very abundants, if effectively utilizing underground heat
Resource can avoid causing environmental pollution, meet the requirement of sustainable development, but do not propose that one kind utilizes geothermal energy still at present
The method that exploitation of gas hydrate is hidden, largely constrains the Efficient Development of gas hydrates.The present invention is proposed
A bite heating power well development geothermal energy is set up, and transfers thermal energy to hydrate layer, promotes decomposition of hydrate, realization utilizes geothermal energy
The purpose of gas hydrates is developed, its equipment is simple and convenient to operate, economy is strong, can be hidden for large scale mining hydrate
There is provided and instruct.
The content of the invention
The method that geothermal energy exploitation of gas hydrate is hidden is employed the present invention relates to a kind of utilization fluid circulation mode, mainly
Comprise the following steps：
(1) according to block geological tectonic environment, hydrate Tibetan is contained in selection seabed and hydrate layer bottom has geothermal layer
Block as measure region, geothermal layer temperature is more than 120 DEG C；
(2) two mouthfuls of well constructions, one heating power well and producing well well group are made a call to, wherein heating power well is made up of four parts, including two
Vertical well section, two net horizontal sections, different well sections, to obtain higher heat exchange efficiency, are specifically bored using the heat insulation layer of diverse location
Well step is：Vertical well section (1) is bored to hydrate layer apart from topAt position, deflecting generation length is 500~1500m's
Net horizontal section (2), is then bored in the middle part of vertical well section (3) to geothermal layer at the top of distanceAt position, deflecting generation length exists
Fluid communication, the wherein horizontal perforation of producing well is not present with stratum in 1000m level above well section (4), the heating power well not perforation
Section is located at hydrate layer top apart from topIt is at position and parallel with heating power well net horizontal section (2) and be positioned above；
(3) producing well carries out decompression exploitation, and the fluid injection rate for controlling the heating power well is 50~150m3/ d,
The development scheme produced using oil pipe sprue bushing, injects cold fluid in its well mouth oil pipe, and fluid, which is reached, enters oil behind shaft bottom
Manage the annular space between sleeve pipe and occur heat exchange with geothermal layer, by carrying when heating fluid returns to hydrate layer through sleeve pipe
Energy transmission is thermally decomposed to hydrate, hydrate, under gravity, is decomposed the natural gas produced and is produced through the top
Well water flat fire hole section is produced；
(4) the aerogenesis speed of producing well is continued to monitor, when aerogenesis speed is less than 1000~2000m3Heating power well stops during/d
Injection, producing well stops exploitation.
The beneficial effects of the invention are as follows：
It utilizes the geothermal energy exploitation of gas hydrate of earth formation deep, heat injection that can be greatly during exploitation reducig
Cost, greatly improves recovery ratio.Present device is simple and convenient to operate, and can open up a new approach for hydrate.
Brief description of the drawings
Fig. 1 is that heating power well and producing well well group exploitation hydrate hide schematic diagram.
Fig. 2 is the vertical well section of heating power well (1) casing programme schematic diagram.
Fig. 3 is heating power well net horizontal section (2) casing programme schematic diagram.
Fig. 4 is the vertical well section of heating power well (3) casing programme schematic diagram.
Fig. 5 is heating power well net horizontal section (4) casing programme schematic diagram.
In figure：1st, the vertical well section of heating power well (1)；2nd, heating power well net horizontal section (2)；3rd, the vertical well section of heating power well (3)；4th, it is hot
Power well net horizontal section (4)；5th, gas hydrates；6th, geothermal layer；7th, heating power well；8th, producing well；9th, heat insulation layer；10th, seal
Shaft bottom.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings, but does not limit the practical range of the present invention.
According to block geological tectonic environment, selection seabed contains hydrate Tibetan and hydrate layer bottom and there is the area of geothermal layer
Block is as measure region, and geothermal layer temperature is 150 DEG C；
As shown in figure 1, making a call to two mouthfuls of well constructions, one heating power well 7 and the well group of producing well 8, wherein heating power well 7 in measure region
It is made up of four parts, including two vertical well sections, two net horizontal sections, different well sections are using the thermal insulation layer 9 of diverse location to obtain
To higher heat exchange efficiency, specific drilling phase is：Vertical well section (1) is bored to hydrate layer 5 apart from topAt position, deflecting
The net horizontal section (2) that length is 1000m is generated, is then bored at the top of vertical well section (3) to the middle part distance of geothermal layer 6At position, make
Fluid communication, wherein producing well 8 is not present with stratum in the net horizontal section (4) that tiltedly generation length is 1000m, the not perforation of heating power well 6
Horizontal perforated interval is located at the top of hydrate layer 5 apart from topIt is at position and parallel with the net horizontal section of heating power well 7 (2)；
As shown in figure 1, producing well 8 carries out decompression exploitation, the fluid injection rate for controlling heating power well 7 is 70m3/ d, is used
The development scheme of oil pipe sprue bushing extraction, injects cold fluid in its well mouth oil pipe, fluid reach enter behind shaft bottom oil pipe with
Simultaneously with geothermal layer 6 heat exchange occurs for annular space between sleeve pipe, by the energy of carrying when heating fluid returns to hydrate layer 5 through sleeve pipe
Amount passes to hydrate, and hydrate is thermally decomposed, under gravity, decomposes the natural gas produced through the water of top producing well 8
Flat fire hole section is produced；
The aerogenesis speed of producing well 8 is continued to monitor, when aerogenesis speed is less than 1000m3Heating power well stops injection, production during/d
Well stops exploitation.
The part do not addressed in detail above is the common knowledge of those of ordinary skill in the art, and the present invention is not limited to
Preferred forms are stated, it is every to have with of the invention anyone should learn that the structure change made under the enlightenment of the present invention
Same or like technical scheme, each falls within the scope of the present invention.
Claims (9)
1. a kind of method that utilization fluid circulation mode employs geothermal energy exploitation of gas hydrate Tibetan, it is same that it beats a bite on sea
Heart cast heating power well runs through hydrate layer and its underpart geothermal layer, and cold fluid is injected in well mouth oil pipe, and fluid enters in shaft bottom
Heated after sleeve pipe by geothermal layer, heating fluid returns to hydrate layer and provides energy for decomposition of hydrate, to aid in producing well to enter
Row decompression exploitation, so as to greatly improve recovery ratio, it is characterised in that comprise the following steps that：
Step (1)：According to block geological tectonic environment, hydrate Tibetan is contained in selection seabed and hydrate layer bottom has geothermal layer
Block be used as measure region；
Step (2)：Two mouthfuls of well constructions, one heating power well and producing well well group are made a call to, wherein the horizontal perforated interval of the producing well is located at water
Compound layer is apart from topAt position, wherein the heating power well is drilled into hydrate layer apart from topAt position, deflecting life
Into the net horizontal section for having certain length, bottom geothermal layer is then drilled into apart from topAt position, deflecting generation has a fixed length
The net horizontal section of degree, the heating power well not perforation, therefore fluid communication is not present with stratum；
Step (3)：The producing well carries out decompression exploitation, injects cold fluid in the well mouth oil pipe of the heating power well, fluid is arrived
Enter annular space between oil pipe and sleeve pipe after up to shaft bottom and occur heat exchange with geothermal layer, heating fluid is returned through sleeve pipe and is hydrated
By the energy transmission of carrying to hydrate during nitride layer, hydrate is thermally decomposed, under gravity, decomposes the natural gas produced
Through the horizontal perforated interval extraction of producing well described in top；
Step (4)：The aerogenesis speed of producing well is continued to monitor, when aerogenesis speed is less than 1000~2000m3Heating power well stops during/d
Injection, producing well stops exploitation.
2. a kind of utilization fluid circulation mode as claimed in claim 1 employs the side of geothermal energy exploitation of gas hydrate Tibetan
Method, it is characterised in that it is heating secondary buck exploitation that hydrate, which hides mining type, and energy is by geothermal layer needed for decomposition of hydrate
There is provided.
3. a kind of utilization fluid circulation mode as claimed in claim 1 employs the side of geothermal energy exploitation of gas hydrate Tibetan
Method, it is characterised in that the heating power well is made up of four parts, including two vertical well sections, two net horizontal sections, are specifically connected
Sea well section (1) vertical with hydrate layer, the net horizontal section (2) positioned at hydrate layer bottom, connect hydrate layer and underground heat
The vertical well section (3) and the net horizontal section (4) in the middle part of geothermal layer of layer.
4. a kind of utilization fluid circulation mode as claimed in claim 1 employs the side of geothermal energy exploitation of gas hydrate Tibetan
Method, it is characterised in that the geothermal layer temperature is more than 120 DEG C.
5. a kind of utilization fluid circulation mode as described in claim 1 and 4 employs geothermal energy exploitation of gas hydrate Tibetan
Method, it is characterised in that the length of the heating power well net horizontal section (2) is 500~1500m, the heating power well net horizontal section (4)
Length in more than 1000m.
6. a kind of utilization fluid circulation mode as described in claim 1 and 4 employs geothermal energy exploitation of gas hydrate Tibetan
Method, it is characterised in that the heating power well outside the oil pipe of net horizontal section (2) and net horizontal section (4) plus one layer of heat insulation layer with
Reduce the heat exchange of oily tube fluid and set tube fluid；Add one layer of thermal insulation outside the oil pipe of vertical well section (3) and outside sleeve pipe
Layer is to reduce the loss of heat in heating power well conveying heating flow liquid process.
7. a kind of utilization fluid circulation mode as described in claim 1 and 9 employs geothermal energy exploitation of gas hydrate Tibetan
Method, it is characterised in that the adiabatic layer material of the heating power well is polyethylene.
8. a kind of utilization fluid circulation mode as described in claim 1 and 4 employs geothermal energy exploitation of gas hydrate Tibetan
Method, it is characterised in that the horizontal perforated interval of producing well should be parallel and disposed thereon with the heating power well net horizontal section (2)
Side.
9. a kind of utilization fluid circulation mode as described in claim 1 and 4 employs geothermal energy exploitation of gas hydrate Tibetan
Method, it is characterised in that the fluid injection rate of the heating power well is 50~150m3/d。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710573395.8A CN107130944B (en) | 2017-07-14 | 2017-07-14 | A method of employing geothermal energy exploitation of gas hydrate hiding in the way of fluid circulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710573395.8A CN107130944B (en) | 2017-07-14 | 2017-07-14 | A method of employing geothermal energy exploitation of gas hydrate hiding in the way of fluid circulation |
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| Publication Number | Publication Date |
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| CN107130944A true CN107130944A (en) | 2017-09-05 |
| CN107130944B CN107130944B (en) | 2019-11-05 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590594A (en) * | 2018-04-02 | 2018-09-28 | 齐鲁工业大学 | A kind of method and apparatus system to be tapped natural gas using sea surface warm water |
| CN109736754A (en) * | 2019-03-06 | 2019-05-10 | 大连理工大学 | A kind of device and method using hot dry rock exploitation of gas hydrate |
| CN109882133A (en) * | 2019-03-06 | 2019-06-14 | 大连理工大学 | A kind of device and method using discarded high temperature and pressure gas reservoir exploitation gas hydrates |
| CN112392445A (en) * | 2020-11-09 | 2021-02-23 | 中国海洋石油集团有限公司 | Combined exploitation system and method for hydrate reservoir and conventional oil and gas reservoir |
| CN112483052A (en) * | 2020-12-21 | 2021-03-12 | 吉林大学 | Device and method for inhibiting generation of wellbore hydrate by circulating seawater |
| CN116411887A (en) * | 2023-06-05 | 2023-07-11 | 太原理工大学 | Device and method for exploiting coal bed gas by utilizing geothermal energy |
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| CN105840146A (en) * | 2016-04-14 | 2016-08-10 | 中国石油大学(华东) | Method for self-circulation exploitation of geothermal energy of hot dry rock with multilateral well and volume fracturing technologies |
| CN105863568A (en) * | 2016-04-14 | 2016-08-17 | 中国石油大学(华东) | Method for exploring dry-hot-rock geotherm through underground heat siphon self-circulation |
| CN106884628A (en) * | 2017-03-29 | 2017-06-23 | 中国石油大学(华东) | Joint underground heat and CO2Replacement exploitation Gas Hydrate In Sea Areas method and system |
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| JP3914994B2 (en) * | 2004-01-28 | 2007-05-16 | 独立行政法人産業技術総合研究所 | Integrated facilities with natural gas production facilities and power generation facilities from methane hydrate sediments |
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| CN102272417A (en) * | 2008-12-31 | 2011-12-07 | 雪佛龙美国公司 | Method and system for producing hydrocarbons from a hydrate reservoir using available waste heat |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590594A (en) * | 2018-04-02 | 2018-09-28 | 齐鲁工业大学 | A kind of method and apparatus system to be tapped natural gas using sea surface warm water |
| CN109736754A (en) * | 2019-03-06 | 2019-05-10 | 大连理工大学 | A kind of device and method using hot dry rock exploitation of gas hydrate |
| CN109882133A (en) * | 2019-03-06 | 2019-06-14 | 大连理工大学 | A kind of device and method using discarded high temperature and pressure gas reservoir exploitation gas hydrates |
| CN112392445A (en) * | 2020-11-09 | 2021-02-23 | 中国海洋石油集团有限公司 | Combined exploitation system and method for hydrate reservoir and conventional oil and gas reservoir |
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| CN112483052A (en) * | 2020-12-21 | 2021-03-12 | 吉林大学 | Device and method for inhibiting generation of wellbore hydrate by circulating seawater |
| CN112483052B (en) * | 2020-12-21 | 2023-11-10 | 吉林大学 | Device and method for inhibiting generation of shaft hydrate by circulating seawater |
| CN116411887A (en) * | 2023-06-05 | 2023-07-11 | 太原理工大学 | Device and method for exploiting coal bed gas by utilizing geothermal energy |
| CN116411887B (en) * | 2023-06-05 | 2023-08-18 | 太原理工大学 | Device and method for exploiting coal bed gas by utilizing geothermal energy |
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