CN102900406B - Pressure pulse oil well production increasing device and application process thereof - Google Patents
Pressure pulse oil well production increasing device and application process thereof Download PDFInfo
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- CN102900406B CN102900406B CN201210381403.6A CN201210381403A CN102900406B CN 102900406 B CN102900406 B CN 102900406B CN 201210381403 A CN201210381403 A CN 201210381403A CN 102900406 B CN102900406 B CN 102900406B
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Abstract
The present invention relates to petroleum industry oil well production increasing equipment, be specially a kind of pressure pulse oil well production increasing device.Its technical scheme is: comprise sleeve pipe, oil pipe and well head joint, setting pressure impulse ejection instrument bottom described oil pipe, and the sleeve pipe tube wall corresponding to it is provided with perforation; Annular space between described oil pipe and sleeve pipe is provided with packer.During use, in oil pipe, inject high pressure liquid by well head joint, by pressure impulse ejects instrument inject high pressure pulse liquid, after entering annular space by perforation with high pressure, at a high speed, pulses enters water filling layer, thus ensure the permeability of oil reservoir.Compared with prior art, the present invention is used for, in common water injection well, being injected into stratum, significantly improving flood effectiveness, greatly improve oil recovery factor after utilizing pressure impulse ejects instrument that stable pressure liquid is changed into periodic pressure pulse liquid.
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
In order to improve output and the recovery ratio of oil-gas Layer, each oil field extensively adopts multiple yield-increasing technology measure, comprises oil-field flooding, pressure break and acidifying and Microbial Enhanced Oil Recovery, thermal recovery oil tech, vibration oil production technique, polymer displacement of reservoir oil and carbon dioxide flooding oil tech.The use of these technology, improves the rate of oil and gas recovery, but the raising recovery ratio that these technology can only be very limited.The vibration oil production technique of early application, as the oil recovery of artificial earthquake method, hydraulic vibration oil recovery, Sonic Wave Oil Producing Technology, due to the problem of technology, key equipment etc., causes DeGrain, develops comparatively slow.Conventional waterflooding with the water filling of normal pressure mode formation, but due to the inhibition on stratum, make pressure liquid also completely infiltration cause oil well attached enter time, ground water filling is just difficult to reinject, display " saturated " state.In addition, pressure liquid flows to low pressure, gap, low flow resistance rock stratum often, and its result is exactly pressure liquid and is full of whole water filling layer completely, but in the partial area of water filling layer.
Summary of the invention
For the defect that prior art exists, object of the present invention provide a kind of constructs simple, control flexibly, Be very effective, safe and reliable and greatly can 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, setting pressure impulse ejection instrument bottom described oil pipe, and the sleeve pipe tube wall corresponding to it is provided with perforation; Annular space between described oil pipe and sleeve pipe is provided with packer.During use, in oil pipe, inject high pressure liquid by well head joint, by pressure impulse ejects instrument inject high pressure pulse liquid, after entering annular space by perforation with high pressure, at a high speed, pulses enters water filling layer, thus ensure the permeability of oil reservoir.
Such scheme can also be improved to further:
Described well head joint also connects air rubber capsule, and with oil pipe inner space, be namely communicated with oil pipe inner high voltage liquid, to reduce the pulsation of high pressure liquid at well head.
Described pressure impulse ejects instrument connects the controller of well head by cable.By to pressure impulse ejects instrument output signal, control flow and the pulsation period of high pressure liquid.
Below provide a kind of concrete pressure impulse ejects instrument, it comprises cylindrical body, its upper end is provided with the upper interface be connected with oil pipe, lower end is provided with the guide peg of sealed bottom, and between guide peg and cylindrical body, be provided with lower outlet, and opened and closed by the slide block that guide peg is slidably matched, the movement of described slide block is controlled by controller.Namely control slide block by controller to move on the guide bar, close lower outlet when it moves to guide peg top and cylindrical body lower end reclines, 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 in common water injection well (also can be meet relevant regulations, the producing horizon that can improve oil recovery factor, rock stratum etc.), stratum is injected into after utilizing pressure impulse ejects instrument that stable pressure liquid is changed into periodic pressure pulse liquid, significantly improve flood effectiveness, greatly improve oil recovery factor.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of pressure pulse oil well production increasing device.
Fig. 2 is the schematic diagram that in pressure pulse oil well production increasing device, pressure impulse ejects instrument is in closed condition.
Fig. 3 is the schematic diagram that in pressure pulse oil well production increasing device, pressure impulse ejects instrument is in opening.
Fig. 4 is after pressure impulse ejects instrument is in opening, in the individual pulse cycle pass through the time m-flow curve schematic diagram of pressure liquid.
Fig. 5 for pressure impulse ejects instrument within multiple pulse period by the time m-flow curve schematic diagram of pressure liquid.
Fig. 6 is after pressure impulse ejects instrument is in opening, m-pressure curve schematic diagram when water filling layer is within the individual pulse cycle.
Detailed description of the invention
Embodiment 1
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, setting pressure impulse ejection instrument 10 bottom oil pipe 8, and the sleeve pipe tube wall corresponding to it is provided with perforation 11; Annular space 12 between oil pipe 8 and sleeve pipe 6 is provided with packer 9; Well head joint 2 is also provided with air rubber capsule 1, and is communicated with oil pipe inner high voltage liquid; Pressure impulse ejects instrument 10 is connected by control cables in well 7, and well head control cables 4 connects the controller 3 of well head.
Pressure impulse ejects instrument 10 comprises cylindrical body 17, its upper end is provided with the upper interface 18 be connected with oil pipe 8, lower end is provided with the guide peg 19 of sealed bottom, and is provided with lower outlet 20 between guide peg 19 and cylindrical body 17, and is opened and closed by the slide block 14 that guide peg 19 is slidably matched; The movement of slide block 14 is controlled by controller 3.
Specific works process is: first by after Valve controlling by well head joint 2 of the high pressure liquid 13 of ground high-pressure pump pumping, the inner passage via oil pipe 8 arrives pressure impulse ejects instrument 10.Pressure impulse ejects instrument 10 is controlled by control cables 7 in well head control cables 4, well by controller 3, the slide block 14 of pressure impulse ejects instrument 10 is moved up and down along guide peg 19, thus 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, pulses enters water filling layer 5.Packer 9 will enter pressure pulse liquid 16 and the sleeve pipe 6 internal upper part annular isolation of annular space 12.Use air rubber capsule 1 at well head, absorb the pressure fluctuation of high pressure liquid 13, ensure 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 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 sleeve pipe 6, can protect oil pipe 8 be not subject to strata pressure impact and squeeze ruin.
Impulse ejection instrument 10, under the control of controller 3, due to galvanomagnetic-effect, makes the parts slide block 14 of impulse ejection instrument 10 slide up and down.Slip cycle, the pressure pulse liquid 16 jet exit gap 15 of slide block 14 all can be controlled by ground, thus can enter the flow behind stratum, pulsation period by controlled pressure pulse liquid 16.Annular space 12 is isolated by packer 9 by pressure pulse liquid 16, prevents high pressure liquid from returning to ground by the annular space of sleeve pipe and oil pipe.
Perforation 11 is passages that pressure pulse liquid 16 enters water filling layer 5, if modes such as slotted liner completion, barefoot completion or gravel pack completions, then pressure pulse liquid enters water filling layer 5 via the fluid passage that completion is formed.
Fig. 4-5 illustrates that in individual pulse cycle and continuous multiple pulse period, pressure pulse liquid 16 is by the flow in gap 15 respectively.See Fig. 4, originally this gap keeps closing, and flow is zero.This gap starts to open, the speed that gap is opened, and namely slide block to be started from scratch acceleration with the speed of several millimeters per second.At the end of the time period 21, slide block reaches its maximum speed, moves with constant high speed at ensuing stroke at time period 22 slide block; In the time period 23, slide block reduces speed now, and becomes standard-sized sheet in time period 24 gap, and then slide block keeps static when opening completely.During gap 15 increases, during the time period 21,22 and 23, flow correspondingly increases.When gap Full-open, start to keep constant at time period 24 place's flow.Be in the most high pressure liquid of complete opening stage be injected in gap or be discharged to stratum; And seismic wave, the i.e. all-wave of dynamic flow, be formed in gap when opening beginning, namely in time period 21,22 and 23 slide block moving process.Gap 15 opening speed is faster, and the volume that high pressure liquid is injected into 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, the energy of degree of porosity ripple is subsequently larger.Therefore, the object of pressure pulse oil well production increasing device and key are the opening time of pressure impulse ejects instrument 10, namely from totally-enclosed to opening up comprehensively in the time short as far as possible.
Fig. 6 reflected within the single cycle, m-pressure dependence when entering the pressure liquid on stratum.Amplitude 25 determines the size that pressure liquid enters formation volume.In almost all cases, the fracture pressure substantially exceeding local porous media is irrational.26 is the time that pressure liquid reaches maximum amplitude, and for pressure impulse ejects instrument, optimize the key that the slide block rise time is instrument, when pressure impulse ejects instrument cuts out, the pressure of pressure liquid reaches our design pressure.
Claims (7)
1. a pressure pulse oil well production increasing device, comprises sleeve pipe, oil pipe and well head joint, it is characterized in that: be fitted through the pressure impulse ejects instrument that controller controls bottom described oil pipe, and the sleeve pipe tube wall corresponding to it is provided with perforation; Annular space between described oil pipe and sleeve pipe is provided with packer; Described pressure impulse ejects instrument comprises cylindrical body, and its upper end is provided with the upper interface be connected with oil pipe, and lower end is provided with the guide peg of sealed bottom, and is provided with lower outlet between guide peg and cylindrical body, and is opened and closed by the slide block that guide peg is slidably matched; The movement of described slide block is controlled by controller.
2. pressure pulse oil well production increasing device according to claim 1, is characterized in that: described well head joint also connects air rubber capsule, and with oil pipe inner space.
3. pressure pulse oil well production increasing device according to claim 1 and 2, is characterized in that: described pressure impulse ejects instrument connects the controller of well head by cable.
4. pressure pulse oil well production increasing device according to claim 1, is characterized in that: described oil pipe can be plain tubing, coiled tubing, small casing, hollow rod or composite material tube.
5. the application process of the arbitrary described pressure pulse oil well production increasing device of claim 1,2,4, it is characterized in that: in oil pipe, inject high pressure liquid by the oil pipe mouth of well head joint, produce pressure pulse by controller controlled pressure impulse ejection instrument, high pressure liquid is injected water filling layer by perforation.
6. the application process of pressure pulse oil well production increasing device according to claim 5, is characterized in that: described well head air rubber capsule, Absorbable rod pulsation, steadily well head high pressure liquid pressure.
7. the application process of pressure pulse oil well production increasing device according to claim 5, is characterized in that: described high pressure liquid can be water, steam, CO
2, natural gas, chemicals, polymer or microorganism.
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| CN104929605B (en) * | 2015-06-26 | 2017-06-09 | 重庆地质矿产研究院 | Underground hydraulic pulse staged fracturing and permeability increasing device and method |
| CN106337674B (en) * | 2016-08-30 | 2018-12-25 | 中国石油大学(北京) | The method for improving the fine and close oily individual well daily output |
| 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 |
| 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. |