CN112031730A - Mechanical horizontal well inter-fracture alternate injection-production oil extraction process - Google Patents
Mechanical horizontal well inter-fracture alternate injection-production oil extraction process Download PDFInfo
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- CN112031730A CN112031730A CN202010966994.8A CN202010966994A CN112031730A CN 112031730 A CN112031730 A CN 112031730A CN 202010966994 A CN202010966994 A CN 202010966994A CN 112031730 A CN112031730 A CN 112031730A
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- injection
- oil
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 238000000605 extraction Methods 0.000 title claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 49
- 239000007924 injection Substances 0.000 claims abstract description 49
- 238000004873 anchoring Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 9
- 239000003129 oil well Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 238000002791 soaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
Abstract
The invention relates to the technical field of oil extraction engineering, and belongs to a mechanical horizontal well inter-fracture alternate injection-production oil extraction process. The method solves the problem of effective utilization of the difficult-to-recover reserves of the oil field, and can continuously utilize the intersegmental cracks as injection and recovery channels after the fracturing failure development of the horizontal well, supplement the stratum energy and improve the recovery ratio. The device consists of a well mouth sealing device (1), an oil extraction well mouth (2), an oil pipe (3), a conventional oil well pump (4), an anchoring releasing device (5), a safety joint (6), a packer (7), a ball-throwing type one-way injection allocation device (8), a one-way production allocation device (9), a differential pressure type one-way injection allocation device (10) and a plug (11). The invention also discloses a mechanical alternate injection-production oil extraction process among horizontal well fractures, and the mechanical alternate injection-production oil extraction process has the advantages of simple and reasonable process structure, simple and convenient construction steps, safe and reliable string tripping, no need of an injection well and the like.
Description
Technical Field
The invention relates to the technical field of oil extraction engineering, and belongs to a mechanical horizontal well inter-fracture alternate injection-production oil extraction process.
Background
At present, the oil field difficult-to-recover reserve is mainly transformed by means of fracturing measures to realize short-time enhanced oil recovery, after natural energy is exhausted, follow-up energy cannot be effectively supplemented, and a conventional injection-production mode cannot play a role in the difficult-to-recover reserve utilization, so that the yield is reduced quickly. Therefore, the mechanical alternate injection-production oil extraction process among the horizontal well fractures can realize the continuous supplement of stratum energy after the horizontal well fracture failure development, recover the injection-production relationship and improve the recovery ratio.
Disclosure of Invention
The invention aims to provide a mechanical horizontal well inter-fracture alternate injection and production oil extraction process which can continuously supplement stratum energy and recover injection and production relations after horizontal well fracture failure development so as to improve the recovery ratio.
The technical scheme of the invention is as follows: the mechanical alternate injection and production device between horizontal well cracks consists of a well mouth sealing device, an oil extraction well mouth, an oil pipe, a conventional oil well pump, an anchoring and releasing device, a safety joint, a packer, a ball-throwing type one-way injection allocation device, a one-way production allocation device, a differential pressure type one-way injection allocation device and a plug; the mechanical horizontal well inter-fracture alternate injection and production oil extraction process is realized by the following steps:
a. firstly, a pipe column consisting of an anchoring releasing device, a safety joint, a packer, a ball-throwing type one-way injection allocation device, a one-way production allocation device, a differential pressure type one-way injection allocation device and a pipe plug is put into a preset position of a horizontal well;
b. the setting anchoring releasing device and the packer are pressed in the oil pipe;
c. the pressure of the oil pipe is increased, and a sliding sleeve switch in the sliding sleeve type one-way injection allocation device is opened to enable the sliding sleeve type one-way injection allocation device to be in an injectable state;
d. after soluble balls with corresponding sizes are thrown from an oil extraction wellhead, an oil pipe is pressed, and a sliding sleeve switch in the ball throwing type one-way injection allocation device is opened to enable the ball throwing type one-way injection allocation device to be in an injectable state;
e. after steel balls with corresponding sizes are thrown from an oil extraction wellhead, an oil pipe is pressed, a releasing sliding sleeve in the anchoring releasing device is activated, and a pipe column is released in the well;
f. the releasing pipe column is taken out and put into a conventional oil well pump, and then a wellhead sealing device is installed;
g. injecting a displacement fluid from the casing, wherein the displacement fluid enters the corresponding fracture from the one-way injection allocation device and drives the oil in the reservoir to the adjacent fracture;
h. after stopping injecting and soaking for a period of time, the petroleum enters the oil pipe from the one-way production allocator;
i. after blowout, disassembling a wellhead sealing device, and turning to normal production;
j. when the sand blocking phenomenon occurs, the fishing device is used for fishing the tool string in the well, the pipe column above the blocking point can be lifted out at the position of the safety joint, and the remaining pipe columns are fished through well washing treatment.
The ball-throwing type one-way injection allocation device can be used in multiple stages, and an internal sliding sleeve is opened in a pressing mode after ball throwing, so that an injection passage is opened.
The differential pressure type one-way injection allocation device opens the inner sliding sleeve in a pressurizing mode so as to open the injection channel.
The anchoring mechanism in the anchoring releasing device is activated in a pressing mode, and the releasing mechanism is activated in a pressing mode after the ball is thrown.
Compared with the prior art, the invention has the following beneficial effects:
the invention can utilize the fracture after the horizontal well fracturing modification as an injection and production channel, continuously realize the injection and production relation, recover the stratum energy, does not need an injection well, improves the recovery ratio, and has simple structure and convenient operation.
Description of the drawings: FIG. 1 is a schematic structural diagram of the present invention.
The specific implementation mode is as follows: the invention will be further described with reference to the accompanying drawings in which: the device consists of a wellhead sealing device 1, an oil extraction wellhead 2, an oil pipe 3, a conventional oil well pump 4, an anchoring releasing device 5, a safety joint 6, a packer 7, a ball-throwing type one-way injection allocation device 8, a one-way production allocation device 9, a differential pressure type one-way injection allocation device 10 and a plug 11; when the method is implemented on site, the mechanical horizontal well inter-fracture alternate injection and production oil extraction process is realized by the following steps:
a. firstly, a pipe column consisting of an anchoring releasing device 5, a safety joint 6, a packer 7, a ball-throwing type one-way injection allocation device 8), a one-way production allocation device 9), a differential pressure type one-way injection allocation device 10 and a plug 11 is put into a preset position of a horizontal well;
b. the setting anchoring releasing device 6 and the packer 7 are pressed in the oil pipe 3;
c. the pressure of the oil pipe 3 is increased, and a sliding sleeve switch in the sliding sleeve type one-way injection allocation device 8 is opened to enable the sliding sleeve type one-way injection allocation device to be in an injectable state;
d. after soluble balls with corresponding sizes are thrown from the oil extraction well mouth 2, the oil pipe 3 is pressed, and a sliding sleeve switch in the ball throwing type one-way injection allocation device 8 is opened to enable the ball throwing type one-way injection allocation device to be in an injectable state;
e. after steel balls with corresponding sizes are thrown from the oil extraction well mouth 2, the oil pipe 3 is pressed, a releasing sliding sleeve in the anchoring releasing device 5) is activated, and a pipe column is released in the well;
f. the releasing pipe column is taken out and put into a conventional oil well pump 4, and then a wellhead sealing device 1 is installed;
g. injecting a displacement fluid from the casing, wherein the displacement fluid enters the corresponding fracture from the one-way injection allocation device 10 and drives the oil in the reservoir to the adjacent fracture;
h. after stopping injecting and soaking for a period of time, the petroleum enters the oil pipe 3 from the one-way production allocator 9;
i. after blowout, disassembling the wellhead sealing device 1 and switching to normal production;
j. when the sand blocking phenomenon occurs, the fishing device is used for fishing the tool string in the well, the pipe column above the clamping point can be lifted out at the position of the safety joint 6, and the remaining pipe columns are fished through well washing treatment.
Claims (4)
1. The mechanical alternate injection and production device between horizontal well cracks comprises a well mouth sealing device (1), an oil extraction well mouth (2), an oil pipe (3), a conventional oil well pump (4), an anchoring releasing device (5), a safety joint (6), a packer (7), a ball-throwing type one-way injection allocation device (8), a one-way production allocation device (9), a differential pressure type one-way injection allocation device (10) and a plug (11); the mechanical horizontal well inter-fracture alternate injection-production oil extraction process utilizing the device is characterized in that: the method is realized by the following steps:
a. firstly, a pipe column consisting of an anchoring releasing device (5), a safety joint (6), a packer (7), a ball-throwing type one-way injection allocation device (8), a one-way production allocation device (9), a differential pressure type one-way injection allocation device (10) and a plug (11) is put into a preset position of a horizontal well;
b. the setting anchoring releasing device (6) and the packer (7) are pressed in the oil pipe (3);
c. the pressure of the oil pipe (3) is increased, and a sliding sleeve switch in the sliding sleeve type one-way injection allocation device (8) is opened to enable the sliding sleeve type one-way injection allocation device to be in an injectable state;
d. after soluble balls with corresponding sizes are thrown from the oil production well head (2), the oil pipe (3) is pressed, and a sliding sleeve switch in the ball throwing type unidirectional injection allocation device (8) is opened to enable the ball throwing type unidirectional injection allocation device to be in an injection state;
e. after steel balls with corresponding sizes are thrown from the oil production wellhead (2), the oil pipe (3) is pressed, a releasing sliding sleeve in the anchoring releasing device (5) is activated, and the pipe column is released in the well;
f. the releasing pipe column is taken out and put into a conventional oil well pump (4), and then a wellhead sealing device (1) is installed;
g. injecting a displacement fluid from the casing, wherein the displacement fluid enters the corresponding fracture from the one-way injection allocator (10) and drives the oil in the reservoir to the adjacent fracture;
h. after stopping injecting and stewing for a period of time, the petroleum enters the oil pipe (3) from the one-way production allocator (9);
i. after blowout, disassembling the wellhead sealing device (1) and switching to normal production;
j. when the sand blocking phenomenon occurs, the fishing device is used for fishing the tool string in the well, the pipe column above the clamping point can be lifted out at the position of the safety joint (6), and the remaining pipe columns are fished through well washing treatment.
2. The mechanical horizontal well inter-fracture alternate injection-production oil recovery process according to claim 1, characterized in that: the ball-throwing type one-way injection allocation device (8) can be used in multiple stages, and an internal sliding sleeve is opened in a pressing mode after ball throwing, so that an injection channel is opened.
3. The mechanical horizontal well inter-fracture alternate injection-production oil recovery process according to claim 1, characterized in that: the differential pressure type one-way injection allocation device (10) opens the inner sliding sleeve in a pressurizing mode so as to open the injection channel.
4. The mechanical horizontal well inter-fracture alternate injection-production oil recovery process according to claim 1, characterized in that: the anchoring mechanism in the anchoring releasing device (5) is activated in a pressing mode, and the releasing mechanism is activated in a pressing mode after the ball is thrown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010966994.8A CN112031730A (en) | 2020-09-15 | 2020-09-15 | Mechanical horizontal well inter-fracture alternate injection-production oil extraction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010966994.8A CN112031730A (en) | 2020-09-15 | 2020-09-15 | Mechanical horizontal well inter-fracture alternate injection-production oil extraction process |
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| Publication Number | Publication Date |
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| CN112031730A true CN112031730A (en) | 2020-12-04 |
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| CN202010966994.8A Pending CN112031730A (en) | 2020-09-15 | 2020-09-15 | Mechanical horizontal well inter-fracture alternate injection-production oil extraction process |
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|---|---|---|---|---|
| US20070199713A1 (en) * | 2006-02-27 | 2007-08-30 | Grant Hocking | Initiation and propagation control of vertical hydraulic fractures in unconsolidated and weakly cemented sediments |
| CN101338663A (en) * | 2008-08-07 | 2009-01-07 | 大庆油田有限责任公司 | Horizontal well mechanical staged fracturing blocking-proof process pipe column |
| CN202810675U (en) * | 2012-07-27 | 2013-03-20 | 中国石油天然气股份有限公司 | Mechanical water plugging string for multiple water outlet points of perforated casing completion multi-section fractured horizontal well |
| CN105696997A (en) * | 2016-03-31 | 2016-06-22 | 中国石油大学(北京) | Method for achieving interval waterflood swallowing-spitting oil exploitation among multi-stage fracturing horizontal well fractures |
| CN105756634A (en) * | 2016-04-22 | 2016-07-13 | 中国石油大学(北京) | Method for achieving interval waterflood swallowing-spitting oil exploitation among multi-stage fractured horizontal well cracks |
| CN105822276A (en) * | 2016-04-22 | 2016-08-03 | 中国石油大学(北京) | Inter-crack space synchronous water injection-oil extraction method of multistage fracturing horizontal well |
| CN106761612A (en) * | 2017-02-14 | 2017-05-31 | 中国石油大学(北京) | The asynchronous water injection oil extraction method of double different wells of pressure break horizontal well of zip mode cloth seam |
| CN110259421A (en) * | 2019-05-23 | 2019-09-20 | 中国石油天然气股份有限公司 | A kind of broken up compact oil reservoir water filling supplement ENERGY METHOD |
| CN110284865A (en) * | 2019-06-27 | 2019-09-27 | 大庆油田有限责任公司 | Process is once completed in fine and close grease horizontal well refracturing and energy supplement |
-
2020
- 2020-09-15 CN CN202010966994.8A patent/CN112031730A/en active Pending
Patent Citations (9)
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|---|---|---|---|---|
| US20070199713A1 (en) * | 2006-02-27 | 2007-08-30 | Grant Hocking | Initiation and propagation control of vertical hydraulic fractures in unconsolidated and weakly cemented sediments |
| CN101338663A (en) * | 2008-08-07 | 2009-01-07 | 大庆油田有限责任公司 | Horizontal well mechanical staged fracturing blocking-proof process pipe column |
| CN202810675U (en) * | 2012-07-27 | 2013-03-20 | 中国石油天然气股份有限公司 | Mechanical water plugging string for multiple water outlet points of perforated casing completion multi-section fractured horizontal well |
| CN105696997A (en) * | 2016-03-31 | 2016-06-22 | 中国石油大学(北京) | Method for achieving interval waterflood swallowing-spitting oil exploitation among multi-stage fracturing horizontal well fractures |
| CN105756634A (en) * | 2016-04-22 | 2016-07-13 | 中国石油大学(北京) | Method for achieving interval waterflood swallowing-spitting oil exploitation among multi-stage fractured horizontal well cracks |
| CN105822276A (en) * | 2016-04-22 | 2016-08-03 | 中国石油大学(北京) | Inter-crack space synchronous water injection-oil extraction method of multistage fracturing horizontal well |
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Application publication date: 20201204 |
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