CN1071836C - Matching technique for changing production well into geothermal exploitation well - Google Patents
Matching technique for changing production well into geothermal exploitation well Download PDFInfo
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- CN1071836C CN1071836C CN98121020A CN98121020A CN1071836C CN 1071836 C CN1071836 C CN 1071836C CN 98121020 A CN98121020 A CN 98121020A CN 98121020 A CN98121020 A CN 98121020A CN 1071836 C CN1071836 C CN 1071836C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The present invention relates to a matching technique for changing exploitation wells into geothermal exploitation wells. The exploitation wells comprise original oil exploitation wells and original gas exploitation wells, which are closed, laid and wasted because various oil and gas resources are exhausted, investment is larger than yield, etc. A plurality of wells in the exploitation wells fit the conditions of geothermal resource exploitation, namely that a wasted well can be changed into a new geothermal resource exploitation well. But the new use of the wells is ignored by people before because of trade limitation; the utilization of the wells benefits to reducing geothermal exploitation cost, realizing the recycling utilization of waste resources, reinvigorating assets and enhancing an investment benefit reward ratio; compared with a new dug geothermal well, more than 40 percent of investment can be saved, and remarkable economic benefit can be obtained.
Description
The present invention relates to a kind of geothermal exploitation supporting technology, the original production of particularly a kind of utilization oil, gas extraction well transfer geothermal energy resources exploitation supporting technology to.
Solar energy, wind energy, tide energy, underground heat generally obtain the great attention of national governments and scientific research department recently as the new green power of 21st century.And underground heat and other new forms of energy comparison are owing to technical simple, the characteristics such as management, small investment, instant effect, remarkable in economical benefits of being convenient to of tool are extensively favored.Guide to ground for making underground heat from deep under ground, used by human, fundamental method is to use rig to drill the superstratum, and use sleeve pipe to be fixed in the above-mentioned boring, make the mounting medium-hot water of underground heat flow out ground by sleeve pipe, its method makes the geothermal exploitation cost change high, and the returns of investment return rate is low.
Task of the present invention is to be to provide a kind of to transfer oil, natural gas extraction well to supporting technology method that geothermal energy resources are developed, and the method is applicable to produce oil, the gas-producing well of closing down, leaving unused, discard because of a variety of causes.Utilize this method can reduce the geothermal exploitation cost greatly, realize the waste resource recycling, vitalize assets, the return rate of increasing investment returns.
The present invention realizes like this, comprise owing to the petroleum resources exhaustion, drop into former oil recovery, the gas recovery well of closing down, leaving unused, discard greater than the output reason, method comprises ground (1), sleeve pipe (2), producing zone (3), plugged zone (4), shaft bottom (5), drilling well deepened section (6), geothermal layer (7), underground heat artificial bottom of a well (8), according to following conditional filtering is the geothermal energy resources development well: 1. finishing drilling is deep and the artificial bottom of a well is darker, the well that geothermal gradient is higher; 2. on the basis of Regional Hydrologic geologic prospecting, the selection water layer is grown, sand body is widely distributed and connective well preferably; 3. the intact relatively well that maybe can carry out casing swage, subsidy of sleeve pipe; 4. the well location distance users is nearer; It is characterized in that: the method comprising the steps of: (1) is under the higher prerequisite of geothermal gradient, can not reach temperature requirement as former well depth, then drilling well is deepened to drilling well deepened section (6), is passed geothermal layer (7) up to underground heat artificial bottom of a well (8), reach temperature requirement as former well depth, can directly carry out following steps; (2) damage, be out of shape as former well completion casing (2), can carry out casing swage, subsidy (10) or window sidetracking (9) are not damaged or are out of shape and can directly carry out following steps as sleeve pipe; (3) adopt physics or the former oil recovery of the eternal shutoff of chemical method, gas production layer position; Use physics, chemical method thoroughly to clean dirt in the well; (4) selection meets the water layer of temperature, water yield requirement, carries out the water layer completion, and the water layer completion comprises perforation and gravel pack; (5) carrying out the insulation of water layer protection and pit shaft handles; (6) according to the difference of user's needs heat, can carry out above-mentioned operation to individual well or the cluster well that is incorporated into the power networks, to satisfy the needs of different user;
Basis of the present invention is that petroleum industry also adopts drilling well and cased hole completion mode containing in underground oil, natural gas resource is exploited out, and have the considerable well of number to meet the condition of geothermal energy resources exploitation in these wells, promptly can become abandoned well and be new geothermal energy resources development well, but this new purposes of these wells had been ignored by people owing to the boundary of industry in the past, utilize these wells for reducing the geothermal exploitation cost, the recycling of realization waste resource, vitalize assets, the return rate of increasing investment returns is all helpful, make geothermal well relatively with new, can save investment more than 40%, remarkable in economical benefits.
Select to meet on geology, the technology well of closing down of geothermal exploitation condition and do technological transformation slightly and can become the underground heat well, for saving investment, developing oil exploitation industry new growth engines realizes that new technological progress meaning is very great.
All kinds ofly close down each corner that well is distributed in the oil field, many well spacings that can transfer geothermal exploitation to are used the regional nearer of hot water.By this project implementation, change original fire coal, fuel oil, gas heating system general layout, reduced management, sewage charge usefulness, saved fuel cost, simultaneously can realize hot water re-injection oil reservoir-reduction oil reservoir water-sensitive, cold damage, improve the technological progress of recovery ratio.
Fig. 1 is the extend structural representation of well depth of the present invention.
Fig. 2 is the structural representation of casing salvaging of the present invention and sidetracking
Fig. 3 is the structural representation of geothermal well completion of the present invention
The present invention is further described below in conjunction with accompanying drawing.
Embodiment 1:
As shown in Figure 1, ground 1, sleeve pipe 2, producing zone 3, plugged zone 4, shaft bottom 5, drilling well deepened section 6, geothermal layer 7, underground heat artificial bottom of a well 8.The steps include: 1, under the higher prerequisite of geothermal gradient, can not reach temperature requirement as former well depth, then drilling well is deepened to drilling well deepened section 6, is passed geothermal layer 7 up to underground heat artificial bottom of a well 8, reaches temperature requirement as former well depth.Can directly carry out following steps;
2, adopt physics or the primary payzone 3 of the eternal shutoff of chemical method;
3, use physics, chemical method thoroughly to clean dirt in the well;
4, the water layer that preferably meets temperature, water yield requirement carries out water layer completion (as perforation, gravel pack etc.);
5, according to the difference of user's needs heat, can carry out above-mentioned operation to individual well or the cluster well that is incorporated into the power networks, to satisfy the needs of different user;
The ground matched process technology: the ground insulating pump house, the hot-water extraction unit, electric power system is selected; Hot water thermal insulating delivery technology from the geothermal well to user; When carrying high salinity hot water to pipeline corrosion protection, scale control treatments; Engineering constructions such as the engineered and breed of former heating system; The re-injection of heating system warm water oil reservoir; Do not reach customer requirements as geotemperature, can adopt boiler or alternate manner makeup energy,
Embodiment 2:
As shown in Figure 2, ground 1, sleeve pipe 2, producing zone 3, casing window sidetracking 9, shaft bottom 5, casing swage subsidy 10, geothermal layer 7, underground heat artificial bottom of a well 8.
The concrete grammar implementation step is as follows:
1, damaged, be out of shape as former well completion casing 2, can carry out casing swage, subsidy 10, or window sidetracking 9;
2, adopt physics or the primary payzone of the eternal shutoff of chemical method position 3;
3, use physics, chemical method thoroughly to clean dirt in the well;
4, the water layer that preferably meets temperature, water yield requirement carries out water layer completion (as perforation, gravel pack etc.);
5, according to the difference of user's needs heat, can carry out above-mentioned operation to individual well or the cluster well that is incorporated into the power networks, to satisfy the needs of different user;
Other is the same.
Embodiment 3: as shown in Figure 3, and ground 1, sleeve pipe 2, producing zone 3, plugged zone 4, shaft bottom 5, heat-insulation and heat-preservation pipe 12, heat insulating material 11, geothermal layer 7, underground heat artificial bottom of a well 8.
Its step is as follows:
1, adopts the forever stifled former oil recovery of physics or chemical method, gas production layer position;
2, use physics, chemical method thoroughly to clean dirt in the well;
3, the water layer that preferably meets temperature, water yield requirement carries out water layer completion (as perforation, gravel pack etc.)
4, Fig. 3 is seen in water layer protection (sand control etc.) and pit shaft insulation (as using heat-insulation and heat-preservation pipe, annular space filling with inert gas or nitrogen and other physics, chemical heat insulating material).
5, according to the difference of user's needs heat, can carry out above-mentioned operation to individual well or the cluster well that is incorporated into the power networks, to satisfy the needs of different user;
Other is the same.
Claims (1)
1, a kind of method of utilizing oil exploitation well exploitation underground heat, described oil exploitation well comprises owing to the petroleum resources exhaustion, drops into former oil recovery, the gas recovery well of closing down, leaving unused, discard greater than the output reason, method comprises ground (1), sleeve pipe (2), producing zone (3), plugged zone (4), shaft bottom (5), drilling well deepened section (6), geothermal layer (7), underground heat artificial bottom of a well (8), is the geothermal energy resources development well according to following conditional filtering:
1. finishing drilling is deep and the artificial bottom of a well is darker, the well that geothermal gradient is higher;
2. on the basis of Regional Hydrologic geologic prospecting, the selection water layer is grown, sand body is widely distributed and connective well preferably;
3. the intact relatively well that maybe can carry out casing swage, subsidy of sleeve pipe;
4. the well location distance users is nearer;
It is characterized in that: the method comprising the steps of:
(1) under the higher prerequisite of geothermal gradient, can not reach temperature requirement as former well depth, then drilling well is deepened to drilling well deepened section (6), is passed geothermal layer (7) up to underground heat artificial bottom of a well (8), reaches temperature requirement as former well depth, can directly carry out following steps;
(2) damage, be out of shape as former well completion casing (2), can carry out casing swage, subsidy (10) or window sidetracking (9) are not damaged or are out of shape and can directly carry out following steps as sleeve pipe;
(3) adopt physics or the former oil recovery of the eternal shutoff of chemical method, gas production layer position; Use physics, chemical method thoroughly to clean dirt in the well;
(4) selection meets the water layer of temperature, water yield requirement, carries out the water layer completion, and the water layer completion comprises perforation and gravel pack;
(5) carrying out the insulation of water layer protection and pit shaft handles;
(6) according to the difference of user's needs heat, can carry out above-mentioned operation to individual well or the cluster well that is incorporated into the power networks, to satisfy the needs of different user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98121020A CN1071836C (en) | 1998-11-25 | 1998-11-25 | Matching technique for changing production well into geothermal exploitation well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98121020A CN1071836C (en) | 1998-11-25 | 1998-11-25 | Matching technique for changing production well into geothermal exploitation well |
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| Publication Number | Publication Date |
|---|---|
| CN1215790A CN1215790A (en) | 1999-05-05 |
| CN1071836C true CN1071836C (en) | 2001-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN98121020A Expired - Fee Related CN1071836C (en) | 1998-11-25 | 1998-11-25 | Matching technique for changing production well into geothermal exploitation well |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1794509A1 (en) * | 2004-09-08 | 2007-06-13 | Sovani Meksvanh | Solar augmented geothermal energy |
| CN102748888A (en) * | 2011-04-22 | 2012-10-24 | 徐毅 | Geothermal energy utilization device |
| CN103912246A (en) * | 2012-12-29 | 2014-07-09 | 天津滨海世纪能源科技发展有限公司 | Combined geothermal well with perforation structure |
| CN103967466B (en) * | 2013-01-27 | 2016-03-09 | 陕西慷麟石油技术开发有限公司 | PGZ closes down in oil field well restore exploitation and production-increasing technique |
| CN104653137A (en) * | 2013-11-15 | 2015-05-27 | 中国石油天然气股份有限公司 | Casing deformation well shaping and repairing process method |
| CN106761565B (en) * | 2015-11-24 | 2024-03-01 | 中国石油化工股份有限公司 | Oil-gas-water well power generation energy storage device and method |
| CN107192151A (en) * | 2017-05-21 | 2017-09-22 | 庄永林 | Scrap oil-water well underground high heat rock mass heating combined equipment and its heating method in oil field |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4268283A (en) * | 1979-12-31 | 1981-05-19 | W-K-M Wellhead Systems, Inc. | Fluid control means for geothermal wells |
| US4657076A (en) * | 1984-04-17 | 1987-04-14 | Japan Metals And Chemicals Co., Ltd. | Chemical injection tube mounting structure for geothermal well |
| US4972904A (en) * | 1989-08-24 | 1990-11-27 | Foster Oilfield Equipment Co. | Geothermal well chemical injection system |
| CN1053824A (en) * | 1991-03-22 | 1991-08-14 | 天津地热研究培训中心 | Low temperature underground heat multipurpose well head device |
| CN2132827Y (en) * | 1992-07-29 | 1993-05-12 | 天津地热研究培训中心 | Multipurpose wellhead assembly for low temp. terrestrial heat |
| US5253926A (en) * | 1989-09-10 | 1993-10-19 | Compisa Ag | Process for making general use of the earth's heat and obtaining minerals in the zone of weakness (at depths of 13-30 km) |
| CN1206097A (en) * | 1997-07-23 | 1999-01-27 | 余新河 | Geothermal energy extracting method and equipment |
-
1998
- 1998-11-25 CN CN98121020A patent/CN1071836C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4268283A (en) * | 1979-12-31 | 1981-05-19 | W-K-M Wellhead Systems, Inc. | Fluid control means for geothermal wells |
| US4657076A (en) * | 1984-04-17 | 1987-04-14 | Japan Metals And Chemicals Co., Ltd. | Chemical injection tube mounting structure for geothermal well |
| US4972904A (en) * | 1989-08-24 | 1990-11-27 | Foster Oilfield Equipment Co. | Geothermal well chemical injection system |
| US5253926A (en) * | 1989-09-10 | 1993-10-19 | Compisa Ag | Process for making general use of the earth's heat and obtaining minerals in the zone of weakness (at depths of 13-30 km) |
| CN1053824A (en) * | 1991-03-22 | 1991-08-14 | 天津地热研究培训中心 | Low temperature underground heat multipurpose well head device |
| CN2132827Y (en) * | 1992-07-29 | 1993-05-12 | 天津地热研究培训中心 | Multipurpose wellhead assembly for low temp. terrestrial heat |
| CN1206097A (en) * | 1997-07-23 | 1999-01-27 | 余新河 | Geothermal energy extracting method and equipment |
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| CN1215790A (en) | 1999-05-05 |
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