CN103742124A - Method for re-separating produced liquid of underground oil-water separation co-well injection and production well - Google Patents
Method for re-separating produced liquid of underground oil-water separation co-well injection and production well Download PDFInfo
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- CN103742124A CN103742124A CN201310755432.9A CN201310755432A CN103742124A CN 103742124 A CN103742124 A CN 103742124A CN 201310755432 A CN201310755432 A CN 201310755432A CN 103742124 A CN103742124 A CN 103742124A
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Abstract
The invention relates to the technical field of oil recovery engineering, belongs to a method for re-separating produced liquid of an underground oil-water separation co-well injection and production well by utilizing a hydrocyclone, and aims at overcoming the defect of small moisture content reduction range of a well with ultrahigh moisture content. The method for re-separating produced liquid of the underground oil-water separation co-well injection and production well is achieved by a device consisting of an injection pump 1, an underground hydrocyclone 2, a recovery pump 3, a sleeve 4, an oil pipe 5, a sleeve four-way joint 6, a sleeve four-way joint 7, an liquid outlet pipeline 8, a ground hydrocyclone 9 and a liquid return pipeline 10, and finally oil-water separation is performed in underground and well mouth modes. The method has the advantages that the produced liquid amount and the moisture content of the oil well are remarkably reduced under the condition that the crude oil yield is not reduced, the water quality of separated reinjection water is improved, and the like.
Description
Technical field: the present invention relates to technical field of oil production engineering, belong to a kind of Produced Liquid separation method again that utilizes hydrocyclone downhole oil-water separation same-well injection to be adopted to well.
Background technology: when oil field enters the ultra-high water-containing productive life, the increase of water content, has not only improved lifting expense, and the corresponding increase ground processing facility of needs, to tackle the processing requirements of huge liquid measure, make like this oil extraction cost significantly increase, remarkable in economical benefits reduces.Downhole oil-water separation same-well injection excavating technology can carry out in down-hole water-oil separating, when reducing Produced Liquid moisture content, by direct isolated water reinjection into reservoir, shortens Produced Liquid profit handling process.
Summary of the invention: the object of the invention is to invent a kind of in the situation that not reducing extraction oil mass, further reduce extraction liquid measure and moisture content, increase injection rate, and the water quality of the re-injection water after improving it and separating downhole oil-water separation same-well injection is adopted to the Produced Liquid separation method again of well.
The present invention is by realizing with lower device: it is comprised of injection pump, downhole hydraulic cyclone, extraction pump, sleeve pipe, oil pipe, four-way junction of casing, oil pipe four-way, fluid pipeline, ground hydrocyclone and liquid back pipe line, and the present invention realizes by following steps:
A. first from bottom to top injection pump, downhole hydraulic cyclone, extraction pump, oil pipe are connected successively and G.I.H;
B. by an outlet of one end connected pipes four-way of fluid pipeline, the other end connects the inlet of ground hydrocyclone, the underflow opening of one end connecting well mouth hydrocyclone of liquid back pipe line, an outlet of other end splicing sleeve four-way, the overfall of hydrocyclone connects the pipeline that enters pumping plant;
C. original well liquid is entered after oil jacket annular space by oil reservoir, enters downhole hydraulic cyclone, and isolated water is injected into stratum by the injection pump of system, and oil-water mixture arrives ground through the extraction pump lifting of system;
D. oil-water mixture arrives behind ground, and by the outlet of well mouth oil pipe four-way, the fluid of flowing through pipeline, enters well head hydrocyclone, again separates, and the oil-water mixture after again separating, by the overfall of ground hydrocyclone, finally enters pumping plant;
E. the water after separating, through reflux pipeline, is back to sleeve pipe by four-way junction of casing, and the original well liquid providing with extraction layer mixes, and mixed liquor enters downhole hydraulic cyclone and carries out water-oil separating, finally realizes original well liquid and enters front twice water-oil separating of pumping plant.
The present invention compared with the prior art tool has the following advantages:
1), high water-cut well liquid can obtain good water-oil separating in down-hole and well head, further reduces output liquid measure and moisture content, effectively reduces surface water processing pressure.
2), by twice separation, the re-injection water yield is increased, improved the oil-displacement capacity of re-injection water.
3), improved flowing bottomhole pressure (FBHP), make underground equipment Energy Intensity Reduction, extension device application life.
4), the water-cut increase that enters oral fluid stream of downhole hydraulic cyclone, the water quality of the re-injection water after water-oil separating will be improved, and can prevent its obstruction implanted layer.
Accompanying drawing explanation: Fig. 1 is the on-the-spot application of the present invention schematic diagram.
The specific embodiment: the invention will be further described below in conjunction with accompanying drawing.The present invention is by realizing with lower device: it is comprised of injection pump 1, downhole hydraulic cyclone 2, extraction pump 3, sleeve pipe 4, oil pipe 5, four-way junction of casing 6, oil pipe four-way 7, fluid pipeline 8, ground hydrocyclone 9 and liquid back pipe line 10, and the present invention realizes by following steps:
A. first from bottom to top injection pump 1, downhole hydraulic cyclone 2, extraction pump 3, oil pipe 5 are connected successively and G.I.H;
B. by an outlet of one end connected pipes four-way 7 of fluid pipeline 8, the other end connects the inlet of ground hydrocyclone 9, the underflow opening of one end connecting well mouth hydrocyclone 9 of liquid back pipe line 10, an outlet of other end splicing sleeve four-way 6, the overfall of hydrocyclone 9 connects the pipeline that enters pumping plant;
C. original well liquid is entered after oil jacket annular space by oil reservoir, enters downhole hydraulic cyclone 2, and isolated water is injected into stratum by the injection pump 1 of system, and oil-water mixture arrives ground through extraction pump 3 liftings of system;
D. oil-water mixture arrives behind ground, and by the outlet of well mouth oil pipe four-way 7, the fluid of flowing through pipeline 8, enters well head hydrocyclone 9, again separates, and the oil-water mixture after again separating, by the overfall of ground hydrocyclone 9, finally enters pumping plant;
E. the water after separating, through reflux pipeline 10, is back to sleeve pipe 4 by four-way junction of casing 6, and the original well liquid providing with extraction layer mixes, and mixed liquor enters downhole hydraulic cyclone 2 and carries out water-oil separating, finally realizes original well liquid and enters front twice water-oil separating of pumping plant.
Claims (1)
1. pair downhole oil-water separation same-well injection is adopted the Produced Liquid separation method again of well, the present invention is by realizing with lower device: it is comprised of injection pump (1), downhole hydraulic cyclone (2), extraction pump (3), sleeve pipe (4), oil pipe (5), four-way junction of casing (6), oil pipe four-way (7), fluid pipeline (8), ground hydrocyclone (9) and liquid back pipe line (10), it is characterized in that: the present invention realizes by following steps:
A. first from bottom to top injection pump (1), downhole hydraulic cyclone (2), extraction pump (3), oil pipe (5) are connected successively and G.I.H;
B. by an outlet of one end connected pipes four-way (7) of fluid pipeline (8), the other end connects the inlet of ground hydrocyclone (9), the underflow opening of one end connecting well mouth hydrocyclone (9) of liquid back pipe line (10), an outlet of other end splicing sleeve four-way (6), the overfall of hydrocyclone (9) connects the pipeline that enters pumping plant;
C. original well liquid is entered after oil jacket annular space by oil reservoir, enters downhole hydraulic cyclone (2), and isolated water is injected into stratum by the injection pump (1) of system, and oil-water mixture arrives ground through extraction pump 3 liftings of system;
D. oil-water mixture arrives behind ground, by the outlet of well mouth oil pipe four-way (7), the fluid of flowing through pipeline (8), enter well head hydrocyclone (9), again separate, oil-water mixture after again separating, by the overfall of ground hydrocyclone (9), finally enters pumping plant;
E. the water after separating is through reflux pipeline (10), by four-way junction of casing (6), be back to sleeve pipe (4), the original well liquid providing with extraction layer mixes, mixed liquor enters downhole hydraulic cyclone (2) and carries out water-oil separating, finally realizes original well liquid and enters front twice water-oil separating of pumping plant.
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| CN201310755432.9A CN103742124A (en) | 2013-12-28 | 2013-12-28 | Method for re-separating produced liquid of underground oil-water separation co-well injection and production well |
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| CN201310755432.9A CN103742124A (en) | 2013-12-28 | 2013-12-28 | Method for re-separating produced liquid of underground oil-water separation co-well injection and production well |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321041A (en) * | 2015-06-26 | 2017-01-11 | 中国石油化工股份有限公司 | Later development method for reservoir production |
| CN108979614A (en) * | 2017-06-05 | 2018-12-11 | 中国石油天然气股份有限公司 | A kind of ground water-oil separating single-well injection-production system |
| CN109236268A (en) * | 2017-06-30 | 2019-01-18 | 中国石油天然气股份有限公司 | A kind of real-time monitoring device of underground injection flow and injection pressure |
| CN111065792A (en) * | 2017-07-27 | 2020-04-24 | 沙特***石油公司 | System, device and method for downhole water separation |
| CN111946299A (en) * | 2020-08-27 | 2020-11-17 | 中国石油天然气股份有限公司 | Same-well same-layer self-injection-production underground fluid separation self-driving well and production method |
| CN111946300A (en) * | 2020-08-27 | 2020-11-17 | 中国石油天然气股份有限公司 | Same-well same-layer multi-lateral self-injection-production downhole fluid separation self-driving well and production method |
| CN111963119A (en) * | 2020-08-27 | 2020-11-20 | 中国石油天然气股份有限公司 | Same-well multi-layer self-injection-production underground fluid separation self-driving well and production method |
| CN111963120A (en) * | 2020-08-27 | 2020-11-20 | 中国石油天然气股份有限公司 | Same-well same-layer self-injection-production underground fluid separation self-driving well and production method |
| CN112791869A (en) * | 2020-12-30 | 2021-05-14 | 东北石油大学 | Automatic throughput type flow division ratio self-adjusting hydraulic cyclone separation device |
| CN114059971A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Same-well production and injection process method and process system for gas well |
| CN115370337A (en) * | 2021-05-21 | 2022-11-22 | 中国石油天然气股份有限公司 | Fire flooding oil well shaft ground tail gas combined separation system |
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| GB2258167A (en) * | 1991-07-31 | 1993-02-03 | British Petroleum Co Plc | Method for separating production fluids |
| WO1998002637A1 (en) * | 1996-07-12 | 1998-01-22 | Baker Hughes Limited | Downhole cyclone separation |
| US6209641B1 (en) * | 1999-10-29 | 2001-04-03 | Atlantic Richfield Company | Method and apparatus for producing fluids while injecting gas through the same wellbore |
| CN202165055U (en) * | 2011-01-17 | 2012-03-14 | 中国石油大学(华东) | Same-well underground oil-water separating extraction and injection device with surface driving single-screw pump |
| CN202731870U (en) * | 2012-04-01 | 2013-02-13 | 北京化工大学 | Production-injection device for down-hole oil water separation |
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| GB2258167A (en) * | 1991-07-31 | 1993-02-03 | British Petroleum Co Plc | Method for separating production fluids |
| WO1998002637A1 (en) * | 1996-07-12 | 1998-01-22 | Baker Hughes Limited | Downhole cyclone separation |
| US6209641B1 (en) * | 1999-10-29 | 2001-04-03 | Atlantic Richfield Company | Method and apparatus for producing fluids while injecting gas through the same wellbore |
| CN202165055U (en) * | 2011-01-17 | 2012-03-14 | 中国石油大学(华东) | Same-well underground oil-water separating extraction and injection device with surface driving single-screw pump |
| CN202731870U (en) * | 2012-04-01 | 2013-02-13 | 北京化工大学 | Production-injection device for down-hole oil water separation |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321041A (en) * | 2015-06-26 | 2017-01-11 | 中国石油化工股份有限公司 | Later development method for reservoir production |
| CN106321041B (en) * | 2015-06-26 | 2019-02-01 | 中国石油化工股份有限公司 | A kind of later development method for oil reservoir exploitation |
| CN108979614A (en) * | 2017-06-05 | 2018-12-11 | 中国石油天然气股份有限公司 | A kind of ground water-oil separating single-well injection-production system |
| CN109236268A (en) * | 2017-06-30 | 2019-01-18 | 中国石油天然气股份有限公司 | A kind of real-time monitoring device of underground injection flow and injection pressure |
| CN111065792A (en) * | 2017-07-27 | 2020-04-24 | 沙特***石油公司 | System, device and method for downhole water separation |
| CN114059971A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Same-well production and injection process method and process system for gas well |
| CN111946300A (en) * | 2020-08-27 | 2020-11-17 | 中国石油天然气股份有限公司 | Same-well same-layer multi-lateral self-injection-production downhole fluid separation self-driving well and production method |
| CN111963119A (en) * | 2020-08-27 | 2020-11-20 | 中国石油天然气股份有限公司 | Same-well multi-layer self-injection-production underground fluid separation self-driving well and production method |
| CN111963120A (en) * | 2020-08-27 | 2020-11-20 | 中国石油天然气股份有限公司 | Same-well same-layer self-injection-production underground fluid separation self-driving well and production method |
| CN111946299A (en) * | 2020-08-27 | 2020-11-17 | 中国石油天然气股份有限公司 | Same-well same-layer self-injection-production underground fluid separation self-driving well and production method |
| CN112791869A (en) * | 2020-12-30 | 2021-05-14 | 东北石油大学 | Automatic throughput type flow division ratio self-adjusting hydraulic cyclone separation device |
| CN115370337A (en) * | 2021-05-21 | 2022-11-22 | 中国石油天然气股份有限公司 | Fire flooding oil well shaft ground tail gas combined separation system |
| CN115370337B (en) * | 2021-05-21 | 2024-05-10 | 中国石油天然气股份有限公司 | Well shaft ground tail gas combined separation system of oil-fire well |
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Application publication date: 20140423 |