CN102900406A - Pressure-pulse oil well production-increasing device and application method thereof - Google Patents
Pressure-pulse oil well production-increasing device and application method thereof Download PDFInfo
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- CN102900406A CN102900406A CN2012103814036A CN201210381403A CN102900406A CN 102900406 A CN102900406 A CN 102900406A CN 2012103814036 A CN2012103814036 A CN 2012103814036A CN 201210381403 A CN201210381403 A CN 201210381403A CN 102900406 A CN102900406 A CN 102900406A
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Abstract
The invention relates to a piece of oil well production-increasing equipment used in the oil industry, in particular to a pressure-pulse oil well production-increasing device. The technical scheme is as follows: the pressure-pulse oil well production-increasing device comprises a casing, an oil pipe and a wellhead joint, wherein a pressure-pulse ejecting tool is installed at the bottom of the oil pipe; the wall of the casing, corresponding to the pressure-pulse ejecting tool, is provided with ejecting holes; and a packer is arranged on an annular space between the oil pipe and the casing. When the equipment is used, high-pressure liquid is injected into the oil pipe through the wellhead joint, high-pressure pulse liquid is ejected through the pressure-pulse ejecting tool, enters the annular space, and then enters a water injection layer through the ejecting holes in a high pressure, high sped and pulse mode, thus, the permeability of an oil layer is ensured. Compared with the prior art, the equipment is used in an ordinary water injection well; and stable pressure liquid is converted into periodic pressure-pulse liquid by using the pressure-pulse ejecting tool and is subsequently injected into a ground layer, so that the water injection effect is significantly improved, and the raw oil recovery efficiency is greatly improved.
Description
Technical field
The present invention relates to petroleum industry oil well production increasing equipment, be specially a kind of pressure pulse oil well production increasing device.
Background technology
For output and the recovery ratio that improves oil-gas Layer, multiple yield-increasing technology measure is extensively adopted in each oil field, comprises oil-field flooding, pressure break and acidifying and Microbial Enhanced Oil Recovery, thermal recovery oil tech, vibrating oil production technology, polymer displacement of reservoir oil and carbon dioxide flooding oil tech.The use of these technology has improved the rate of oil and gas recovery, but the raising recovery ratio that these technology can only be very limited.The vibrating oil production technology of early application, such as the oil recovery of artificial earthquake method, hydraulic vibration oil recovery, Sonic Wave Oil Producing Technology, the problem owing to technology, key equipment etc. causes DeGrain, develops comparatively slow.Conventional waterflooding in the normal pressure mode to the stratum water filling, but because the inhibition on stratum so that pressure liquid also fully infiltration cause when oil well is attached to be advanced, the ground water filling just is difficult to reinject, and shows " saturated " state.In addition, pressure liquid flows to low pressure, low slit, flow resistance rock stratum often, and its result is exactly pressure liquid and is full of whole water filling layer fully, but regional in the part of water filling layer.
Summary of the invention
For the defective that prior art exists, purpose of the present invention provide a kind of construct simple, control flexibly, effect is remarkable, safe and reliable and can greatly improve the pressure pulse oil well production increasing device of recovery ratio.
Its technical scheme is: comprise sleeve pipe, oil pipe and well head joint, and described oil pipe bottom setting pressure impulse ejection instrument, and its corresponding sleeve pipe tube wall is provided with perforation; Annular space between described oil pipe and the sleeve pipe is provided with packer.During use, in oil pipe, inject high pressure liquid by the well head joint, by pressure pulse emission tool inject high pressure pulse liquid, enter behind the annular space by perforation with high pressure, at a high speed, the pulsation form enters the water filling layer, thereby guarantees the permeability of oil reservoir.
Such scheme can also further be improved to:
Also connect the air bag on the described well head joint, and be communicated with the oil pipe inner chamber, namely be communicated with oil pipe inner high voltage liquid, to reduce high pressure liquid in the pulsation of well head.
Described pressure pulse emission tool connects the controller of well head by cable.By to pressure pulse emission tool output signal, control flow and the pulsation period of high pressure liquid.
Below provide a kind of concrete pressure pulse emission tool, it comprises the tubular body, its upper end is provided with the upper interface that is connected with oil pipe, the lower end is provided with the guide peg of sealed bottom, and be provided with lower outlet between guide peg and the tubular body, and the slide block keying by being slidingly matched on the guide peg, the controller that moves through of described slide block is controlled.Namely mobile at guide peg by controller control slide block, seal lower outlet when it moves to when guide peg top and tubular body lower end recline, otherwise then open lower outlet.
Described oil pipe can be plain tubing, coiled tubing, small casing, hollow rod, glass reinforced plastic pipe, composite material tube.Described high pressure liquid can be water, steam, CO
2, natural gas, chemicals, polymer or microorganism.
Compared with prior art, the present invention is used for common water injection well (also can be to satisfy relevant regulations, the producing horizon that can improve oil recovery factor, rock stratum etc.), be injected into the stratum after utilizing the pressure pulse emission tool that stable pressure liquid is changed into the periodic pressure pulse liquid, significantly improve flood effectiveness, greatly improve oil recovery factor.
Description of drawings
Fig. 1 is the structure principle chart of pressure pulse oil well production increasing device.
Fig. 2 is the schematic diagram that the pressure pulse emission tool is in closed condition in the pressure pulse oil well production increasing device.
Fig. 3 is the schematic diagram that the pressure pulse emission tool is in opening in the pressure pulse oil well production increasing device.
Fig. 4 is after the pressure pulse emission tool is in opening, passes through the time meta-flow curve schematic diagram of pressure liquid in the individual pulse cycle.
Fig. 5 is the pressure pulse emission tool passes through pressure liquid within a plurality of pulse periods time meta-flow curve schematic diagram.
Fig. 6 is after the pressure pulse emission tool is in opening, and the water filling layer is meta-pressure curve schematic diagram when individual pulse is in the cycle.
The specific embodiment
With reference to Fig. 1-3, a kind of pressure pulse oil well production increasing device comprises sleeve pipe 6, oil pipe 8 and well head joint 2, oil pipe 8 bottom setting pressure impulse ejection instruments 10, and its corresponding sleeve pipe tube wall is provided with perforation 11; Annular space 12 between oil pipe 8 and the sleeve pipe 6 is provided with packer 9; Also be provided with air bag 1 on the well head joint 2, and be communicated with oil pipe inner high voltage liquid; Pressure pulse emission tool 10 connects by control cables in the well 7, and well head control cables 4 connects the controller 3 of well head.
Pressure pulse emission tool 10 comprises tubular body 17, its upper end is provided with the upper interface 18 that is connected with oil pipe 8, the lower end is provided with the guide peg 19 of sealed bottom, and guide peg 19 and tubular body 17 between be provided with lower outlet 20, and the slide block by being slidingly matched on the guide peg 19 14 opens and closes; The controller 3 that moves through of slide block 14 is controlled.
The specific works process is: at first after the valve control of high pressure liquid 13 by well head joint 2 by ground high-pressure pump pumping, via the inner passage arrival pressure pulse emission tool 10 of oil pipe 8.Pressure pulse emission tool 10 by 7 controls of control cables in well head control cables 4, the well, makes the slide block 14 of pressure pulse emission tool 10 move up and down along guide peg 19 by controller 3, thereby mineralization pressure pulse liquid 16 sprays via gap 15.After pressure pulse liquid 16 enters annular space 12, by perforation 11 with high pressure, at a high speed, the pulsation form enters water filling layer 5.Packer 9 will enter the pressure pulse liquid 16 and sleeve pipe 6 internal upper part annular isolation of annular space 12.Use air bag 1 at well head, absorb the pressure fluctuation of high pressure liquid 13, guarantee pressure balance.
The high pressure liquid 13 of pumping can be can be water, steam, CO
2, natural gas, chemicals, polymer, microorganism etc.Oil pipe 8 can be that plain tubing, coiled tubing, small casing, hollow rod, glass reinforced plastic pipe, composite material tube or other can be used as the tubing of water injection pipe string.Oil pipe 8 is located in the sleeve pipe 6, can protect oil pipe 8 not to be subject to impact and crowded the ruining of strata pressure.
Fig. 4-5 illustrates respectively individual pulse cycle and continuous a plurality of pulse period internal pressure pulse liquid 16 by the flow in gap 15.Referring to Fig. 4, originally this gap keeps closing, and flow is zero.This gap begins to open, the speed that open in the gap, and namely slide block is with the acceleration of starting from scratch of the speed of several millimeters of per seconds.When the time period 21 finished, slide block reached its maximum speed, moves with constant high speed at ensuing stroke at time periods 22 slide block; In the time period 23, slide block reduces speed now, the standard-sized sheet that becomes in time periods 24 gap, and then slide block keeps static when opening fully.During gap 15 increased, during the time period 21,22 and 23, flow correspondingly increased.When the gap Full-open, begin to keep constant at time periods 24 place's flow.Be in the most high pressure liquid of complete opening stage in the gap and be injected into or be discharged to the stratum; And seismic wave, namely the all-wave of dynamic flow is formed on the gap to open when beginning, namely in time period 21,22 and 23 slide block moving process.Gap 15 opening speeds are faster, and the volume that high pressure liquid is injected into the stratum is larger, and in other words, it is faster that flow increases, i.e. the steeper slopes of the ramp portion of curve map, and the energy of degree of porosity ripple subsequently is just larger.Therefore, the purpose of pressure pulse oil well production increasing device and the crucial opening time that is pressure pulse emission tool 10 are namely from totally-enclosed to opening up comprehensively in the short as far as possible time.
Fig. 6 reflected within the single cycle, meta-pressure dependence when entering the pressure liquid on stratum.Amplitude 25 has determined the size that pressure liquid enters the stratum volume.In nearly all situation, the fracture pressure that substantially exceeds local porous media is irrational.The 26th, pressure liquid reaches the time of the amplitude of maximum, and for the pressure pulse emission tool, optimizing the slide block rise time is the key of instrument, and the pressure of pressure liquid reached our design pressure when the pressure pulse emission tool was closed.
Claims (8)
1. a pressure pulse oil well production increasing device comprises sleeve pipe, oil pipe and well head joint, it is characterized in that: the pressure pulse emission tool by controller control is installed in described oil pipe bottom, and its corresponding sleeve pipe tube wall is provided with perforation; Annular space between described oil pipe and the sleeve pipe is provided with packer.
2. pressure pulse oil well production increasing device according to claim 1 is characterized in that: also connect the air bag on the described well head joint, and be communicated with the oil pipe inner chamber.
3. pressure pulse oil well production increasing device according to claim 1 and 2 is characterized in that: described pressure pulse emission tool connects the controller of well head by cable.
4. pressure pulse oil well production increasing device according to claim 1 and 2, it is characterized in that: described pressure pulse emission tool comprises the tubular body, its upper end is provided with the upper interface that is connected with oil pipe, the lower end is provided with the guide peg of sealed bottom, and be provided with lower outlet between guide peg and the tubular body, and open and close by the slide block that is slidingly matched on the guide peg; The controller that moves through of described slide block is controlled.
5. pressure pulse oil well production increasing device according to claim 4, it is characterized in that: described oil pipe can be plain tubing, coiled tubing, small casing, hollow rod, glass reinforced plastic pipe or composite material tube.
6. the application process of the described pressure pulse oil well production increasing of claim 1-5 device, it is characterized in that: the oil pipe mouth by the well head joint injects high pressure liquid in oil pipe, produce pressure pulse by controller controlled pressure impulse ejection instrument, high pressure liquid is injected the water filling layer by perforation.
7. the application process of pressure pulse oil well production increasing device according to claim 6 is characterized in that: described well head air bag, but Absorbing Fluctuation, steady well head high pressure liquid pressure.
8. according to claim 6 or the application process of 7 described pressure pulse oil well production increasing devices, it is characterized in that: described high pressure liquid can be water, steam, CO
2, natural gas, chemicals, polymer or microorganism.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806214A (en) * | 2015-03-23 | 2015-07-29 | 中国石油天然气股份有限公司 | Imbibition oil production method applicable to low-imbibition oil deposit and lab simulation method |
| CN104929605A (en) * | 2015-06-26 | 2015-09-23 | 重庆地质矿产研究院 | Underground hydraulic pulse staged fracturing and permeability increasing device and method |
| CN106337674A (en) * | 2016-08-30 | 2017-01-18 | 中国石油大学(北京) | Method for increasing daily output of tight oil of single 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 |
| CN108979605A (en) * | 2018-09-18 | 2018-12-11 | 中国石油集团西部钻探工程有限公司 | The method of impulse wave heavy crude producing device and impulse wave heavy crude producing |
| CN110821454A (en) * | 2019-11-29 | 2020-02-21 | 中国石油大学(华东) | Downhole pulse generating device driven by oil pipe transmission and injection method |
| CN107724984B (en) * | 2017-10-11 | 2020-05-12 | 中国科学技术大学 | Method for improving oil and gas recovery ratio by using pulse shock waves |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104806214A (en) * | 2015-03-23 | 2015-07-29 | 中国石油天然气股份有限公司 | Imbibition oil production method applicable to low-imbibition oil deposit and lab simulation method |
| CN104806214B (en) * | 2015-03-23 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of imbibition oil production method and laboratory simulation method suitable for LOW PERMEABILITY RESERVOIR |
| CN104929605A (en) * | 2015-06-26 | 2015-09-23 | 重庆地质矿产研究院 | Underground hydraulic pulse staged fracturing and permeability increasing device and method |
| CN106337674A (en) * | 2016-08-30 | 2017-01-18 | 中国石油大学(北京) | Method for increasing daily output of tight oil of single 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 |
| 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 |
| CN107724984B (en) * | 2017-10-11 | 2020-05-12 | 中国科学技术大学 | Method for improving oil and gas recovery ratio by using pulse shock waves |
| CN108979605A (en) * | 2018-09-18 | 2018-12-11 | 中国石油集团西部钻探工程有限公司 | The method of impulse wave heavy crude producing device and impulse wave heavy crude producing |
| CN110821454A (en) * | 2019-11-29 | 2020-02-21 | 中国石油大学(华东) | Downhole pulse generating device driven by oil pipe transmission and injection method |
| CN110821454B (en) * | 2019-11-29 | 2022-02-11 | 中国石油大学(华东) | Downhole pulse generating device driven by oil pipe transmission and injection method |
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Effective date of registration: 20210115 Address after: No.171 Fenhe Road, Dongying District, Dongying City, Shandong Province 257091 Patentee after: Shandong Plateau oil and gas equipment Co.,Ltd. Address before: No.233, Donger Road, Dongying District, Dongying City, Shandong Province 257091 Patentee before: SHENGLI OILFIELD HIGHLAND PETROLEUM EQUIPMENT Co.,Ltd. |