CN105089571A - Water injection string without surface flow and water injection technological method of water injection string - Google Patents
Water injection string without surface flow and water injection technological method of water injection string Download PDFInfo
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- CN105089571A CN105089571A CN201410224638.3A CN201410224638A CN105089571A CN 105089571 A CN105089571 A CN 105089571A CN 201410224638 A CN201410224638 A CN 201410224638A CN 105089571 A CN105089571 A CN 105089571A
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- water injection
- packer
- screen casing
- string
- water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 238000002347 injection Methods 0.000 title claims abstract description 67
- 239000007924 injection Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 17
- 210000002445 nipple Anatomy 0.000 claims abstract description 15
- 230000001012 protector Effects 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000003306 harvesting Methods 0.000 claims description 14
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000007858 starting material Substances 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 10
- 238000011084 recovery Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003673 groundwater Substances 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 241001672694 Citrus reticulata Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
In order to overcome the defects that during the development process of an existing remote block and an existing small fault block oilfield, a ground water injection system cannot be built due to limitation of conditions, so that an oilfield is developed in an exhausted manner, and original oil in-place s cannot be effectively developed, the invention discloses a water injection string without surface flow and a water injection technological method of the water injection string. A pipe plug, a tubing nipple, a sieve tube I, another tubing nipple, a packer I, a release sub, an insertion-type seal device, an electric submersible pump, a protector, a motor, a motor compensator, a sieve tube II, a packer II, a flow testing assembly and a sieve tube II of the water injection string are connected in sequence from bottom to top; the sieve tube I is positioned on a water injection layer; and the stratum corresponding to the sieve tube III is a water gathering layer. The water injection string and the water injection technological method have the beneficial effects that the string is reasonable in structure, the technological method is effective, during the development process of a remote block and a small block, water injection development operation can be implemented, without building a ground water injection system, the recovery rate and the oil recovery speed are effectively increased, the water injection cost is reduced greatly, and good economy is realized.
Description
Technical field
The present invention relates to a kind of water injection technological string, especially relate to a kind of water injection string without ground flow and water injection technology method thereof.
Background technology
By water injection well to oil-bearing stratum flooding makeup energy, keeping formation pressure, is rely on after natural energy carries out primary oil recovery, or oil field development is one that improves that recovery ratio and rate of oil production be widely adopted important oil reservoir development technology in early days.The ground flood pattern in current oil field, is that injection water is improved pressure by high pressure water-injection pump, after making its pressure reached needed for water filling, then delivers to each distributing room for water injection by water knockout drum and waterline, by distributing room for water injection, moisture is fitted on each water injection well and injects oil reservoir.
Along with deepening continuously of oil field development, in outlying block, minor block oilfield development process, because ground injection pipe network does not match, or limit by ground condition, can not supporting ground flood pattern, cannot implement the waterflooding extraction in oil field, oil in-place can not get effective exploitation, oil field is in the exploitation of exhausted formula, affects the development benefit in oil field.
Summary of the invention
In order to overcome in existing outlying block, minor block oilfield development process, because unconditionally setting up ground flood pattern, cause carrying out exhausted formula exploitation to oil field, oil in-place can not get the deficiency of effective exploitation, the invention provides a kind of water injection string without ground flow and water injection technology method thereof.
The technical solution adopted for the present invention to solve the technical problems is: the water injection string without ground flow comprises screen casing, oil pipe, motor, submersible electric pump, cable, protector, packer, tubing nipple, plug, pit shaft is formed by sleeve pipe and artificial bottom of a well, there is water filling layer pit shaft lower end, water injection string is positioned at pit shaft bottom, and plug, tubing nipple, screen casing I, tubing nipple, packer I, back-off sub, sealing intubate, submersible electric pump, protector, motor, compensator of motor, screen casing II are fixedly connected sequentially from the bottom to top; There is radial intake the pump housing upper end of submersible electric pump; Screen casing I is positioned at the water filling layer place of lower wellbore; Screen casing II upper end has been fixedly connected sequentially packer II, flow rate test assembly, screen casing III; The stratum of screen casing III correspondence is water harvesting layer.
Packer I is back-off packer, and packer II is cup packer.
Without the water injection technology method of ground flow water injection string, the steps include:
A, first, plug, tubing nipple, screen casing I, packer I are fixedly connected sequentially from the bottom to top and form tubing string I, by back-off sub, tubing string I is connected with the oil pipe of upper end, by oil pipe by the sleeve pipe of tubing string I lower going-into-well cylinder to projected depth, screen casing I is positioned at implanted layer;
Then, set packer I, packing oil jacket annular space;
The disengaging of tubing string I and oil pipe is realized again by back-off sub; Oil pipe and back-off sub are proposed from pit shaft;
B, be fixedly connected sequentially back-off sub, sealing intubate, submersible electric pump, protector, motor, compensator of motor, packer II, flow rate test assembly, screen casing III composition tubing string II from the bottom to top, and be fixedly mounted on the lower end of oil pipe, by oil pipe by tubing string II lower going-into-well cylinder; The stratum of screen casing III correspondence is water harvesting layer; Docked with packer I by back-off sub;
Then, set packer II, packing oil jacket annular space;
C, starter motor drive submersible electric pump work, and the injection water of water harvesting layer enters in water injection string through screen casing III, then enter the oil jacket annular space below packer II through the radial weep hole of screen casing II;
Then, injecting water enters in water injection string by the Pump Suction Nozzle of below;
Subsequently, inject water and eventually pass screen casing I discharge downwards, target approach implanted layer through submersible electric pump pressurization.
The invention has the beneficial effects as follows, tubular column structure is reasonable, and process is effective, in outlying block, block of cells development process, water flooding recovery operation can be implemented without the need to building ground flood pattern, effectively improving recovery ratio and rate of oil production, greatly reduce water injection work cost, there is good economy.
Accompanying drawing explanation
Fig. 1 is the water injection string structural representation without ground flow in the present invention.
In figure: 1. oil pipe, 2. cable, 3. screen casing III, 4. flow rate test assembly; 5. packer II, 6. screen casing II, 7. compensator of motor, 8. motor; 9. protector, 10. Pump Suction Nozzle, 11. submersible electric pumps; 12. sealing intubate, 13. back-off subs, 14. packers I; 15. screen casing I, 16. tubing nipples, 17. plugs; 18. artificials bottom of a well, 19. water harvesting layers, 20. implanted layers.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.But those skilled in the art should know, the invention is not restricted to listed detailed description of the invention, as long as spirit according to the invention, all should be included in protection scope of the present invention.
See accompanying drawing 1.The pit shaft that the present invention applies without water injection string and the water injection work method thereof of ground flow is formed by sleeve pipe and artificial bottom of a well 18, there is water filling layer 20 pit shaft lower end, water harvesting layer 19 is positioned at the top of water filling layer 20, and water injection string is placed between water filling layer 20 and water harvesting layer 19.
The plug 17 of water injection string, tubing nipple 16, screen casing I 15, packer I 14, back-off sub 13, sealing intubate 12, submersible electric pump 11, protector 9, motor 8, compensator of motor 7, packer II 5, flow rate test assembly 4, screen casing III 3, oil pipe 1 connect from the bottom to top successively, and there is radial pump intake 10 pump housing upper end of submersible electric pump 11; Screen casing I 15 is positioned at water filling layer 20 place of lower wellbore, and the stratum of screen casing III 3 correspondence is water harvesting layer 19.Packer I 14 is back-off packer, and packer II 5 is cup packer, the packer I 14 after setting, packer II 5 packing oil jacket annular space.
Flow rate test assembly 4 mainly comprises and is located pipe nipple, flow meter (pressure gauge), by become a mandarin under wellhead cable gauge or pressure gauge to being located pipe nipple, can monitor injection flow or the pressure of water filling layer, better to evaluate flood effectiveness.
Apply the water injection technology method without ground flow water injection string, the steps include:
A, first, plug 17, tubing nipple 16, screen casing I 15, packer I 14 are fixedly connected sequentially from the bottom to top and form tubing string I, by back-off sub 13, tubing string I is connected with the oil pipe of upper end, by oil pipe by the sleeve pipe of tubing string I lower going-into-well cylinder to projected depth, screen casing I 15 is positioned at implanted layer 20;
Then, set packer I 14, packing oil jacket annular space;
The disengaging of tubing string I and oil pipe is realized again by back-off sub 13; Oil pipe and back-off sub 13 are proposed from pit shaft;
B, be fixedly connected sequentially back-off sub 13, sealing intubate 12, submersible electric pump 11, protector 9, motor 8, compensator of motor 7, packer II 5, flow rate test assembly 4, screen casing III 3 composition tubing string II from the bottom to top, and be fixedly mounted on the lower end of oil pipe 1, by oil pipe 1 by tubing string II lower going-into-well cylinder; The stratum of screen casing III 3 correspondence is water harvesting layer 19; Docked with packer I 14 by back-off sub 13;
Then, set packer II 5, packing oil jacket annular space;
C, starter motor 8 drive submersible electric pump 11 to work, and the injection water of water harvesting layer 19 enters in water injection string through screen casing III 3, then enter the oil jacket annular space below packer II 5 through the radial weep hole of screen casing II 6; Then, injecting water enters in water injection string by the Pump Suction Nozzle 10 of below; Subsequently, inject water and pressurize downwards through submersible electric pump 11, eventually pass screen casing I 15 and discharge, target approach implanted layer 19.
The present invention is mainly used in the oil field being not suitable for building ground flood pattern because ground condition is complicated, or the minor block oilfield that ground injection pipe network does not match, water injection string is utilized to pass through water harvesting layer pilot production, the injection test of water filling layer in advance, adopt that the water yield is stable reaches certain output in water harvesting layer 19, the needs of implanted layer 20 injection rate can be met, and the injection rate of implanted layer 20 can contentedly plasmogamy note index time, then carry out normal water injection work.
During water injection work, Surface power drive is provided by power cable 2, starter motor 8, motor 8 drives submersible electric pump 11 high-speed rotation, injection water enters water injection string by implanted layer through screen casing III 3 and flows downward, then the annular space between water injection string and sleeve pipe is entered by the screen casing II 6 below packer II 5, enter in water injection string through the Pump Suction Nozzle 10 between protector 9 and submersible electric pump 11 again, inject water after submersible electric pump 11 step by step supercharging, discharged by the screen casing I 15 of water injection string lower end, inject target water filling layer, thus the object realized without ground flow water filling, there is good economy, practicality.
It should be noted that above-described embodiment is example and unrestricted the present invention, those skilled in the art can design a lot of alternate embodiment and not depart from the right of this patent.
Claims (3)
1. the water injection string without ground flow, comprise screen casing, oil pipe, motor, submersible electric pump, cable, protector, packer, tubing nipple, plug, pit shaft is formed by sleeve pipe and artificial bottom of a well, there is water filling layer pit shaft lower end, water injection string is positioned at pit shaft bottom, and plug, tubing nipple, screen casing I, tubing nipple, packer I, back-off sub, sealing intubate, submersible electric pump, protector, motor, compensator of motor, screen casing II are fixedly connected sequentially from the bottom to top; There is radial Pump Suction Nozzle the pump housing upper end of submersible electric pump; Screen casing I is positioned at the water filling layer place of lower wellbore, it is characterized in that: described screen casing II (6) upper end has been fixedly connected sequentially packer II (5), flow rate test assembly (4), screen casing III (3); The stratum that described screen casing III (3) is corresponding is water harvesting layer (19).
2. according to claim 1 without the water injection string of ground flow, it is characterized in that: described packer I (14) is back-off packer, and packer II (5) is cup packer.
3. described in claim 1 without a water injection technology method for ground flow water injection string, the steps include:
A, first, plug (17), tubing nipple (16), screen casing I (15), packer I (14) are fixedly connected sequentially from the bottom to top and form tubing string I, by back-off sub (13), tubing string I is connected with the oil pipe of upper end, by oil pipe by the sleeve pipe of tubing string I lower going-into-well cylinder to projected depth, screen casing I (15) is positioned at implanted layer (20);
Then, set packer I (14), packing oil jacket annular space;
The disengaging of tubing string I and oil pipe is realized again by back-off sub (13); Oil pipe and back-off sub (13) are proposed from pit shaft;
B, be fixedly connected sequentially back-off sub (13), sealing intubate (12), submersible electric pump (11), protector (9), motor (8), compensator of motor (7), packer II (5), flow rate test assembly (4), screen casing III (3) composition tubing string II from the bottom to top, and be fixedly mounted on the lower end of oil pipe (1), by oil pipe (1) by tubing string II lower going-into-well cylinder; The stratum that screen casing III (3) is corresponding is water harvesting layer (19); Docked with the packer I (14) of tubing string I by back-off sub (13);
Then, set packer II (5), packing oil jacket annular space;
C, starter motor (8) drive submersible electric pump (11) work, the injection water of water harvesting layer (19) enters in water injection string through screen casing III (3), then enters the oil jacket annular space of packer II (5) below through the radial weep hole of screen casing II (6); Then, injecting water enters in water injection string by the Pump Suction Nozzle (10) of below; Subsequently, inject water through submersible electric pump (11) pressurization downwards, eventually pass screen casing I (15) and discharge, target approach implanted layer (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410224638.3A CN105089571A (en) | 2014-05-24 | 2014-05-24 | Water injection string without surface flow and water injection technological method of water injection string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410224638.3A CN105089571A (en) | 2014-05-24 | 2014-05-24 | Water injection string without surface flow and water injection technological method of water injection string |
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| CN105089571A true CN105089571A (en) | 2015-11-25 |
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| CN201410224638.3A Pending CN105089571A (en) | 2014-05-24 | 2014-05-24 | Water injection string without surface flow and water injection technological method of water injection string |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035349A (en) * | 2017-06-10 | 2017-08-11 | 山东恒驰石油装备有限责任公司 | A kind of interlayer pressure difference cyclic water stimulation pumping pipe string |
| CN113931600A (en) * | 2020-07-14 | 2022-01-14 | 中国石油化工股份有限公司 | Gas injection pipe column and method for reducing ground injection pressure |
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| US4246964A (en) * | 1979-07-12 | 1981-01-27 | Halliburton Company | Down hole pump and testing apparatus |
| US4366862A (en) * | 1979-07-12 | 1983-01-04 | Halliburton Company | Downhole pump and testing apparatus |
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| CN101187305A (en) * | 2007-01-18 | 2008-05-28 | 中国海洋石油总公司 | Single pipe co-well oil-pumping and water-injecting technological system |
| CN101864921A (en) * | 2010-06-11 | 2010-10-20 | 大港油田集团有限责任公司 | Well completion and oil production string of horizontal well and well completion and oil production processes thereof |
| CN201874543U (en) * | 2010-11-26 | 2011-06-22 | 大港油田集团有限责任公司 | Underground boosting water injection process pipe string |
| CN102900409A (en) * | 2011-07-25 | 2013-01-30 | 中国石油天然气股份有限公司 | Throwing-fishing-free separated layer water injection process pipe column |
| CN202745838U (en) * | 2012-07-04 | 2013-02-20 | 中国石油天然气股份有限公司 | Same well water production and injection process pipe column |
| CN102953716A (en) * | 2011-08-19 | 2013-03-06 | 中国石油天然气集团公司 | Parallel double-tube separate layer water injection string |
| CN102966338A (en) * | 2012-11-27 | 2013-03-13 | 中国石油天然气集团公司 | Single well water production and injection process system capable of measuring flow rate and pressure |
| CN203905910U (en) * | 2014-05-24 | 2014-10-29 | 天津大港油田钻采技术开发公司 | Ground-flow-free water injection string |
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2014
- 2014-05-24 CN CN201410224638.3A patent/CN105089571A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4246964A (en) * | 1979-07-12 | 1981-01-27 | Halliburton Company | Down hole pump and testing apparatus |
| US4366862A (en) * | 1979-07-12 | 1983-01-04 | Halliburton Company | Downhole pump and testing apparatus |
| WO1998025005A1 (en) * | 1996-12-02 | 1998-06-11 | Kelley & Sons Group International, Inc. | Method and apparatus for increasing fluid recovery from a subterranean formation |
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| CN101187305A (en) * | 2007-01-18 | 2008-05-28 | 中国海洋石油总公司 | Single pipe co-well oil-pumping and water-injecting technological system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035349A (en) * | 2017-06-10 | 2017-08-11 | 山东恒驰石油装备有限责任公司 | A kind of interlayer pressure difference cyclic water stimulation pumping pipe string |
| CN113931600A (en) * | 2020-07-14 | 2022-01-14 | 中国石油化工股份有限公司 | Gas injection pipe column and method for reducing ground injection pressure |
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Application publication date: 20151125 |
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