CN105569622A - Underground layering pressure-regulating water injection process pipe string - Google Patents
Underground layering pressure-regulating water injection process pipe string Download PDFInfo
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- CN105569622A CN105569622A CN201410645323.6A CN201410645323A CN105569622A CN 105569622 A CN105569622 A CN 105569622A CN 201410645323 A CN201410645323 A CN 201410645323A CN 105569622 A CN105569622 A CN 105569622A
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Abstract
The invention discloses an underground layering pressure-regulating water injection process pipe string, comprising an oil pipe and an upper packer and a lower packer connected with the oil pipe. The packers divide a water injection well into three water injection layer sections. The oil pipe above the upper packer is also connected with an upper water distributor. The oil pipe below the lower packer is also connected with a lower water distributor. The oil pipe is also connected with a pressure regulating device. The bottom of the oil pipe below the lower packer is provided with a bottom ball. The oil pipe is also provided with an anti-rotating anchor. The underground layering pressure-regulating water injection process pipe string realizes three-layer energy-saving pressure-regulating water injection of the water injection well, wherein a high permeable layer does not need water nozzle throttle control, the surplus energy of the high permeable layer converts to low permeable layer energy, and the low permeable layer energy pressurizes water and the water is injected into a low permeable layer. A new energy consumption device does not need to be added, and utilization rate of energy of the water injection well is improved.
Description
Technical field
The present invention relates to water injection well in oil fields water filling device, specifically laminated distributor under well pressure regulation water injection technological string.
Background technology
The separate layer water injection string that current oil field generally adopts mainly carries out the model for water quantity allocation of each water filling layer within the scope of oil pressure cntrol, and due to non-homogeneity and the physical difference of water injection well interlayer, the high, medium and low permeable formation in down-hole coexists, and there is larger interlayer water suction difference.Water injection pressure when low-permeability layer completes injection allocation exceedes in water pump pressure prescribes a time limit, ground supercharging and downhole pressure increasing water injection technology can only be adopted, but ground pressurized water injection meets low-permeability layer injection allocation pressure requirements, but the chock pressure difference of high permeability formation is increased further, do not solve the problem of high permeability formation restriction loss, that causes a large amount of waste of energy and flow process to bear increases the weight of; Downhole pressure increasing only carries out pressurized water injection to low-permeability layer, and high permeability formation still needs throttling, and power surplus can not effectively utilize.Investigated by the water injection technology state of the art, find to there is no comparatively ripe water injection technology technology at present, to down-hole high permeability formation power surplus Appropriate application, trial-produceed laminated distributor under well pressure regulation water injection technological string successfully for this reason.
Summary of the invention
The object of the present invention is to provide laminated distributor under well pressure regulation water injection technological string, realize water injection well and divide three layers of energy-saving pressure-regulation water filling, wherein high permeability formation controls without the need to water nozzle throttling, high permeability formation power surplus is converted into low-permeability layer energy, low-permeability layer is injected to after water supercharging, new energy consumption equipment need not be increased, improve the utilization rate of water injection well energy.
In order to reach above-mentioned purpose, present invention employs following technical scheme, laminated distributor under well pressure regulation water injection technological string, comprise oil pipe and be connected to two packers up and down on oil pipe, water injection well is divided into three water filling intervals, wherein the described oil pipe in the top of upper packer also connects upper injection well downhole flow regulator, the described oil pipe in below of lower packet also connects lower injection well downhole flow regulator.
Described oil pipe is also connected with regulator.
Described regulator is arranged between upper and lower two packers.
End ball is provided with bottom described oil pipe below described lower injection well downhole flow regulator.
Described oil pipe is also provided with anti-rotation anchor.
Described anti-rotation anchor is arranged between upper and lower two packers.
Compared to prior art, the present invention has following beneficial effect:
Tubing string of the present invention can be designed as three sections and two sections of seperated layer water injections, according to the high, medium and low distribution situation of interlayer water injection pressure, three sections of water fillings can form two kinds of water injection string structures, according to the water filling interval upper-lower position that water injection pressure is placed in the middle, regulator can design at tubing string bottom, also can design at tubing string topmost, is mainly the low-permeability layer pressurized water injection in high and low permeable formation to two adjacent earth formations, high permeability formation step-down water filling, realizes dispensing three layers; It is two-layer that the regulator that simultaneously also can be used alone realizes dispensing, low-permeability layer pressurized water injection, high permeability formation step-down water filling.Water injection well can be realized at most and divide three layers of energy-saving pressure-regulation water filling, wherein high permeability formation controls without the need to water nozzle throttling, and high permeability formation power surplus is converted into low-permeability layer energy, injects low-permeability layer to after water supercharging, new energy consumption equipment need not be increased, improve the utilization rate of water injection well energy.
Accompanying drawing explanation
Fig. 1 is laminated distributor under well pressure regulation water injection technological string schematic diagram of the present invention.
In figure, 1-injection well downhole flow regulator; 2-packer; 3-regulator; 4-anti-rotation anchor; 5-packer; 6-injection well downhole flow regulator; 7-end ball.
Detailed description of the invention
Detailed description for the present invention and technology contents, coordinate accompanying drawing to be described as follows, but accompanying drawing only provides with reference to the use with explanation, is not used for being limited the present invention.
With reference to accompanying drawing 1, laminated distributor under well pressure regulation water injection technological string, comprise oil pipe and be connected to two packers up and down on oil pipe, water injection well is divided into three water filling intervals, the described oil pipe in top of its upper packer 2 also connects upper injection well downhole flow regulator 1, the described oil pipe in below of lower packet 5 also connects lower injection well downhole flow regulator 6.Described oil pipe is also connected with regulator 3.Described regulator is arranged between upper and lower two packers.End ball 7 is provided with bottom described oil pipe below described lower injection well downhole flow regulator.Described oil pipe is also provided with anti-rotation anchor 4.Described anti-rotation anchor is arranged between upper and lower two packers.Wherein used injection well downhole flow regulator or regulator are existing product, directly buy and install, and discuss its structure without the need to launching.
Tubing string of the present invention can be designed as three sections and two sections of seperated layer water injections, according to the high, medium and low distribution situation of interlayer water injection pressure, three sections of water fillings can form two kinds of water injection string structures, according to the water filling interval upper-lower position that water injection pressure is placed in the middle, regulator can design at tubing string bottom, also can design at tubing string topmost, is mainly the low-permeability layer pressurized water injection in high and low permeable formation to two adjacent earth formations, high permeability formation step-down water filling, realizes dispensing three layers; It is two-layer that the regulator that simultaneously also can be used alone realizes dispensing, low-permeability layer pressurized water injection, high permeability formation step-down water filling.Water injection well can be realized at most and divide three layers of energy-saving pressure-regulation water filling, wherein high permeability formation controls without the need to water nozzle throttling, and high permeability formation power surplus is converted into low-permeability layer energy, injects low-permeability layer to after water supercharging, new energy consumption equipment need not be increased, improve the utilization rate of water injection well energy.
Oil pipe is connected with injection well downhole flow regulator 1, and injection well downhole flow regulator 1 is connected with packer 2, and packer 2 is connected with regulator 3, and regulator 3 is connected with anti-rotation anchor 4, and anti-rotation anchor 4 is connected with packer 5, and packer 5 is connected with injection well downhole flow regulator 6, and injection well downhole flow regulator 6 is connected with end ball 7.
The course of work: go into the well, connects end ball, injection well downhole flow regulator, packer, anti-rotation anchor, regulator, packer and injection well downhole flow regulator successively and is connected to well head with oil pipe again.
Water filling, oil pipe water is by the upper strata of injection well downhole flow regulator injection topmost, and a part divides injection intermediate layer through the decompression portion of regulator, and the compression portion that a residue part passes through regulator injects orlop.
Test, lower inbound traffics measure full well water injection rate and upper strata water injection rate, then pull the blanking plug in regulator out, under enter tester and be sealed in blanking plug position, measure intermediate layer water injection rate, obtain lower floor's water injection rate by accumulation calculating.
Allotment, pull the water nozzle of water distributor core allotment topmost out, intermediate layer needs to pull blanking plug out, under enter to be with water nozzle to block fuse, control weep hole flow.
1, realize three stage layered pressure regulation water fillings, high permeability formation power surplus obtains rationalization utilization; 2, the energy waste that water nozzle throttling causes is eliminated; 3, realize energy trasfer, improve water filling interval qualification rate.
The energy-conservation water injection string of downhole hydraulic automatic Regulation is mainly used in water injection well layering pressure regulation water filling, be applicable to the dispensing well that interlayer water injection pressure differs greatly, high permeability formation is injected after the step-down of part water, low-permeability layer is injected after remainder supercharging, meet the water distribution requirement of each water filling layer, the injected water volume of each layer can regulate simultaneously, can realize the rationalization conversion of interlayer energy, reach energy-saving and cost-reducing target, in interlayer pressure difference larger multistage water injection well, there is very wide application prospect.
The foregoing is only preferred embodiment of the present invention, be not used to limit the scope of the claims of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.
Claims (6)
1. laminated distributor under well pressure regulation water injection technological string, it is characterized in that, comprise oil pipe and be connected to two packers up and down on oil pipe, water injection well is divided into three water filling intervals, wherein the described oil pipe in the top of upper packer also connects upper injection well downhole flow regulator, the described oil pipe in below of lower packet also connects lower injection well downhole flow regulator.
2. laminated distributor under well pressure regulation water injection technological string according to claim 1, is characterized in that, described oil pipe is also connected with regulator.
3. laminated distributor under well pressure regulation water injection technological string according to claim 2, is characterized in that, described regulator is arranged between upper and lower two packers.
4. laminated distributor under well pressure regulation water injection technological string according to claim 1, is characterized in that, is provided with end ball below described lower injection well downhole flow regulator bottom described oil pipe.
5. laminated distributor under well pressure regulation water injection technological string according to claim 1, is characterized in that, described oil pipe is also provided with anti-rotation anchor.
6. laminated distributor under well pressure regulation water injection technological string according to claim 5, is characterized in that, described anti-rotation anchor is arranged between upper and lower two packers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645323.6A CN105569622A (en) | 2014-11-10 | 2014-11-10 | Underground layering pressure-regulating water injection process pipe string |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410645323.6A CN105569622A (en) | 2014-11-10 | 2014-11-10 | Underground layering pressure-regulating water injection process pipe string |
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| CN105569622A true CN105569622A (en) | 2016-05-11 |
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| CN201410645323.6A Pending CN105569622A (en) | 2014-11-10 | 2014-11-10 | Underground layering pressure-regulating water injection process pipe string |
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Cited By (4)
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| CN106321076A (en) * | 2016-10-19 | 2017-01-11 | 中国石油化工股份有限公司 | Method for testing starting pressure of water injection well |
| CN106555572A (en) * | 2016-11-30 | 2017-04-05 | 中国海洋石油总公司 | A kind of manpower intervention formula pulsed infusion equipment and its pulsed infusion method |
| CN107420076A (en) * | 2017-07-07 | 2017-12-01 | 中国石油天然气股份有限公司 | A kind of turbine augmented injection device applied in dispensing well in oil field |
| CN108222905A (en) * | 2017-12-29 | 2018-06-29 | 中国石油大学(华东) | Three layers of double pressure regulation water injection technological strings and regulator optimization method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106321076A (en) * | 2016-10-19 | 2017-01-11 | 中国石油化工股份有限公司 | Method for testing starting pressure of water injection well |
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| CN106555572B (en) * | 2016-11-30 | 2018-12-14 | 中国海洋石油集团有限公司 | A kind of manpower intervention formula pulsed infusion method |
| CN107420076A (en) * | 2017-07-07 | 2017-12-01 | 中国石油天然气股份有限公司 | A kind of turbine augmented injection device applied in dispensing well in oil field |
| CN108222905A (en) * | 2017-12-29 | 2018-06-29 | 中国石油大学(华东) | Three layers of double pressure regulation water injection technological strings and regulator optimization method |
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Application publication date: 20160511 |