CN108019190A - A kind of totally-enclosed mixes defeated decompression circulation gas lift system - Google Patents

A kind of totally-enclosed mixes defeated decompression circulation gas lift system Download PDF

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Publication number
CN108019190A
CN108019190A CN201711421130.2A CN201711421130A CN108019190A CN 108019190 A CN108019190 A CN 108019190A CN 201711421130 A CN201711421130 A CN 201711421130A CN 108019190 A CN108019190 A CN 108019190A
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China
Prior art keywords
gas
pipeline
air inlet
connects
outlet
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Granted
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CN201711421130.2A
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Chinese (zh)
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CN108019190B (en
Inventor
张西跃
刘恒
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Shandong Huasheng Rong Oil And Gas Equipment Co ltd
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Zhongshan Leman Petroleum Equipment Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121Lifting well fluids
    • E21B43/122Gas lift
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34Arrangements for separating materials produced by the well
    • E21B43/38Arrangements for separating materials produced by the well in the well

Abstract

The invention discloses a kind of totally-enclosed to mix defeated decompression circulation gas lift system,Including christmas tree and gaslift mechanism,Christmas tree is provided with bushing pipeline,Oil pipe pipeline and multi-purpose station pipeline,Gaslift mechanism includes gas-purification mechanism and gas boosting mechanism,Gas-purification mechanism has air inlet,Gas outlet and liquid outlet,The air inlet of gas-purification mechanism taps into the oil pipe pipeline of mouth,Gas outlet connects the air inlet of gas boosting mechanism,Liquid outlet connects multi-purpose station pipeline,The gas outlet of gas boosting mechanism connects bushing pipeline,The present invention is that gaslift mechanism is added on the basis of existing christmas tree,Liquid after gaslift organizational separation is sent into multi-purpose station pipeline after mixing pump is pressurized and realizes the closed conveying without outer row,Realize circulation gaslift technique and mixed defeated decompression process integration fusion alternate application,The natural gas well is set to form a kind of benign cycle,Reach the equilibrium state of gas production and shaft bottom water yield,Realize high and stable yields of the natural gas well under blowing state,Energy conservation and environmental protection.

Description

A kind of totally-enclosed mixes defeated decompression circulation gas lift system
Technical field
The present invention relates to a kind of totally-enclosed to mix defeated decompression circulation gas lift system, belongs to exploitation of oil-gas field technology field.
Background technology
With the increase of productive life, different degrees of hydrops is had in the natural gas well and is produced, hydrops can cause the production of gas well Measure deep fades even stop-spraying.Current water drainage-gas recovery technology method has tapping mode(Closing well is pressed again, and throughput reaches when driving a well Minimum takes aerogenesis discharge opeing after flow quantity), bubble row(Hydrops foamed is set to reduce the kinematic viscosity and relative density of hydrops), plunger gas Lift(Discharge opeing is risen by piston gas-powered fluid column), underground vortex(Liquid rate is taken by eddy current effect raising gas), gas Lift discharge opeing(Pass through oil pipe discharge opeing in oil jacket annular space injection gases at high pressure)Deng, wherein, gas lift liquid drainage technique is for watered-out well and production The gas well of tolerance wretched insufficiency reproduces and increases production the effect for having and getting instant result.
In oil jacket annular space of the gas lift liquid drainage technique generally by the high-pressure air source injection natural gas well(Casing), pass through oil pipe Bottom(Or gas lift valve)Hydrops in gas well is discharged into well head by oil pipe, gas lift liquid drainage mode traditional at present has elevated pressure nitrogen Gas gaslift, face the gaslift of well high-pressure air source, natural gas boosting gaslift etc..
Gas lift liquid drainage technique generally has aerogenesis stratum injury, and the application of gas lift liquid drainage technique also has certain application bar Part and limitation, if excessively application can bring the grievous injury on nearly well aerogenesis stratum, cause nearly Jing Chucengshui to lock, can not be further Output natural gas causes thorough stop-spraying, or needs long-time closing well to press again.
According to the exploitation basic principle of the general natural gas well, the height of well head oil pressure determines gas well yield and gas Fluid-carrying capability.Under normal circumstances, well head oil pressure and outer defeated gas well when being pressed with pressure difference just have natural gas output and form yield, outer defeated Pressure is generally dependent on the well head ductwork pressure in whole oil field, and general is metastable.Middle and later periods gas well shaft bottom pressure itself Constantly decay, and the defeated pressure of outer wellhead is stable, so, the pressure difference of well head oil pressure and outer defeated pressure less and less can cause yield anxious Play decay.Gaslift technique is actually to add bottom pressure, keeps stablizing output, and takes suitable pit shaft and shaft bottom product out of Liquid.The discharge of pit shaft and shaft bottom hydrops is so that the mill resistance and the static pressure difference of wellbore effusion that gas flows in pit shaft further subtract It is few, in the case where bottom pressure is stablized, well head oil pressure can be further improved, realizes steady production.
Current gas lift liquid drainage is realized by vehicle-mounted flowing gas lift liquid drainage device, if using this gas well gas and outside During source of the gas of the gas transmission as compressor, will generally pre-treatment be carried out to source of the gas, the moisture content in gas and debris separation is laggard Enter fluid reservoir to be transported with waterwheel, due to containing substantial amounts of liquid in many block gas wells, so causing secondary outer row and transport same The a small amount of gas overflowings of Shi Huiyou, can not accomplish that totally-enclosed conveys, cause the of high cost of gaslift and the pollution to environment.
The content of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of realize and circulates gaslift technique and mixed defeated decompression technique one Bodyization merges alternate application, and realizes that the totally-enclosed of the complete closed conveying of output gas-liquid mixes defeated decompression circulation gas lift system.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of totally-enclosed mixes defeated decompression circulation gas lift system, including christmas tree and gaslift mechanism, the christmas tree are provided with and oil The bushing pipeline of set annular space connection and the oil pipe pipeline that is connected with oil pipe and outer defeated with bushing pipeline and oil pipe pipeline connection Pipeline, the end of the multi-purpose station pipeline is outer defeated interface tube, and oil pressure transmitter, described sleeve pipe pipe are provided with the oil pipe pipeline Set pressure transmitter is provided with road, flowmeter is provided with the multi-purpose station pipeline.
The gaslift mechanism includes gas-purification mechanism and gas boosting mechanism;The gas-purification mechanism has air inlet Mouth, gas outlet and liquid outlet, the air inlet of the gas-purification mechanism connect the oil pipe pipeline, and gas outlet connects the gas boosting The air inlet of mechanism, liquid outlet connect the multi-purpose station pipeline, and the gas outlet of the gas boosting mechanism connects described sleeve pipe pipeline.
Gas-purification mechanism includes air inlet separation buffer tank, whirlpool separator, cyclone separator, filter, moisture content absorption Tank, accurate filter, plunger pump and gas fluid mixture pump;The gas boosting mechanism includes gas compressor.The air inlet separation The air inlet of surge tank connects the oil pipe pipeline, and gas outlet connects the air inlet of the whirlpool separator, and liquid outlet connects the gas-liquid The inlet of mixing pump;The gas outlet of the whirlpool separator connects the inlet end of the cyclone separator, and liquid outlet connects the column Fill in the inlet of pump;The gas outlet of the cyclone separator connects the air inlet of the filter, and liquid outlet connects the plunger pump Inlet;The gas outlet of the filter connects the air inlet of the moisture content adsorption tanks, and liquid outlet connects the inlet of the plunger pump; The gas outlet of the moisture content adsorption tanks connects the air inlet of the accurate filter;The gas outlet of the accurate filter connects the combustion The air inlet of air compressor, liquid outlet connect the inlet of the plunger pump;The liquid outlet of the plunger pump and gas fluid mixture pump Liquid outlet connects the multi-purpose station pipeline by first check-valve and second check-valve respectively;The gas outlet of the gas compressor passes through 3rd check-valves connects described sleeve pipe pipeline.
Specifically, the air inlet of the air inlet separation buffer tank connects the pressure valve in the christmas tree, the gas pressure The gas outlet of contracting machine connects the casing valve in described sleeve pipe pipeline by the 3rd check-valves, and the multi-purpose station pipeline is connect in oil pipe pipeline Regulating valve.
The beneficial effects of the invention are as follows:The present invention adds gaslift mechanism, gaslift mechanism point on the basis of existing christmas tree Liquid from after is sent into multi-purpose station pipeline after plunger pump is pressurized and realizes the closed conveying without outer row, circulates gaslift technique and mixing pump Progressively reduce well head oil pressure in certain outer defeated pressure and realize mixed defeated decompression process integration fusion alternate application, when hydrops is serious When by circulating gaslift so that hydrops is discharged in time, when the nearly outer defeated pressure of well head oil crimping, is separated by mixing pump from air inlet slow Rush pot bottom liquids and gases are mixed and transport to outer defeated pipe, while on the premise of defeated pressure is stablized outside, reduce the raising of well head oil pressure Gas well yield, makes the natural gas well form a kind of benign cycle, reaches the equilibrium state of gas production and shaft bottom water yield, realizes natural High and stable yields of the gas well under blowing state, energy conservation and environmental protection.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the system structure diagram of the present invention.
Embodiment
With reference to Fig. 1, a kind of totally-enclosed mixes defeated decompression circulation gas lift system, including christmas tree and gaslift mechanism, the gas production Tree be provided with the bushing pipeline connected with oil jacket annular space 1 and the oil pipe pipeline connected with oil pipe 2 and with bushing pipeline and oil pipe The multi-purpose station pipeline of pipeline connection, the end of the multi-purpose station pipeline is outer defeated interface tube 3, and oil pressure change is provided with the oil pipe pipeline Device 19 is sent, set pressure transmitter 20 is provided with described sleeve pipe pipeline, flowmeter 21 is provided with the multi-purpose station pipeline.
The gaslift mechanism includes gas-purification mechanism and gas boosting mechanism;The gas-purification mechanism has air inlet Mouth, gas outlet and liquid outlet, the air inlet of the gas-purification mechanism connect the oil pipe pipeline, and gas outlet connects the gas boosting The air inlet of mechanism, liquid outlet connect the multi-purpose station pipeline, and the gas outlet of the gas boosting mechanism connects described sleeve pipe pipeline.
The gas-purification mechanism include air inlet separation buffer tank 4, whirlpool separator 5, cyclone separator 6, filter 7, Moisture content adsorption tanks 8, accurate filter 9, plunger pump 11 and gas fluid mixture pump 12;The gas boosting mechanism includes gas compressor 10(Gas-engine-driven compressor).The air inlet of the air inlet separation buffer tank 4 connects the oil pipe pipeline, and gas outlet connects The air inlet of the whirlpool separator 5, liquid outlet connect the inlet of the gas fluid mixture pump 12;The whirlpool separator 5 goes out Gas port connects the inlet end of the cyclone separator 6, and liquid outlet connects the inlet of the plunger pump 11;The cyclone separator 6 Gas outlet connects the air inlet of the filter 7, and liquid outlet connects the inlet of the plunger pump 11;The gas outlet of the filter 7 The air inlet of the moisture content adsorption tanks 8 is connect, liquid outlet connects the inlet of the plunger pump 11;The outlet of the moisture content adsorption tanks 8 Mouth connects the air inlet of the accurate filter 9;The gas outlet of the accurate filter 9 connects the air inlet of the gas compressor 10 (Combustion gas transmitter air inlet and compressor gas air inlet), liquid outlet connects the inlet of the plunger pump 11;The plunger pump 11 liquid outlet and the liquid outlet of gas fluid mixture pump 12 are connect described outer defeated by first check-valve 13 and second check-valve 14 respectively Pipeline, is provided with valve 22 between first check-valve 13 and second check-valve 14 and multi-purpose station pipeline;The gas compressor 10 Gas outlet(Gases at high pressure gas outlet)Described sleeve pipe pipeline is connect by the 3rd check-valves 15.
Specifically, the air inlet of the air inlet separation buffer tank 4 connects the pressure valve of the christmas tree in the oil pipe pipeline 16, the gas outlet of the gas compressor 10 connects the casing valve 17 in described sleeve pipe pipeline by the 3rd check-valves 15, described outer Defeated pipeline connects the regulating valve 18 in oil pipe pipeline.
The output gas-liquid mixture of the natural gas well initially enters air inlet separation buffer tank 4, to the gas-liquid mixture of well head into The preliminary gas-liquid separation of row, is equipped with the cylindrical separator with isolating cylinder in the entrance of air inlet separation buffer tank 4 and is separated into action edge, Initial gross separation of the sedimentation realization to gas-liquid mixture is carried out in tank body space at the same time, from the gas outlet of air inlet separation buffer tank 4 The gas of discharge is substantially free of liquid water(Oil), liquid sedimentation tank body lower part enter gas fluid mixture pump 12 in, sent after pressurized Enter multi-purpose station pipeline, realize the closed conveying without outer liquid.
The gas discharged from air inlet separation buffer tank 4 enters fog-like liquid in the further separating natural gas of whirlpool separator 5, Then cyclone separator 6 reduces the moisture content in natural gas, then sequentially enters filter 7 again, moisture content adsorption tanks 8 further drop The moisture content of low gas, finally enters the powder that accurate filter 9 filters out molecular sieve in moisture content adsorption tanks 8, makes from accurate mistake The natural gas of the gas outlet discharge of filter 9 reaches the requirement of gas engine and compressor to gas purification degree, protects combustion gas compression Machine securely and reliably works, and the liquid produced in purification process is sent into multi-purpose station pipeline after pressurizeing by plunger pump 11, realizes without outer row Closed conveying.
The present invention uses double pump scheme, is due to that the pressure of separator produces pressure difference less than buffer tank pressure, gas Liquid mixing pump can directly realize gas-liquid delivery, export(At outer defeated interface tube, outer defeated pressure)In the case of pressure stability, pass through gas Liquid mixing pump realizes that reducing well head oil pressure, that is, gas fluid mixture pump realizes the pressure difference for mixing defeated decompression, raising oil pressure and outer defeated pressure, at the same time The liquid that separator-filter is separated is pressurizeed by plunger pump and uses plunger pump to realize the pressurized delivered of separating liquid to outer Defeated pipe, realizes that separation the liquid closed of sum is conveyed into outer defeated pipe.
When carrying out circulation gaslift technique, gas compressor is the well opening natural gas contracting pressurization injection oil jacket by purification Annular space(Casing)It is interior, complete the gas injection function in gaslift technique.Christmas tree fuel tap is closed at this time, the gas in oil pipe constantly by Compression pressurization injection oil jacket annular space, realizes that this well circulates gaslift;Oil pressure gradually reduces, and casing pressure is stepped up, the fluid column in oil pipe Constantly rise final discharge well mouth oil pipe, realize gas lift liquid drainage;When this well amount of natural gas is insufficient can from outer defeated pipe or Lin Jing takes gas pressurization injection oil jacket annular space(Casing).
After the completion of circulation gaslift is fluid column discharge well head discharge opeing in pit shaft, gas compressor stops output high pressure gas at this time Body, gas fluid mixture pump, which starts to work well head natural gas to pressurize, injects multi-purpose station pipeline, since outer defeated pressure is metastable, so Well head oil pressure gradually reduces, and the natural gas volume expanding gas flow velocity in oil pipe greatly improves, and the water rate of taking of gas also carries significantly Height, at this time the liquid in the pore of near wellbore formation be constantly carried out, maintenance can start to improve after a certain period of time near The quantum of output and bottom pressure of the natural gas on well stratum, form a kind of benign cycle, with the liquid quilt in landing surface internal hair pore Take out of, gas release pressure, which reduces, can cause more natural gases to be released output in stratum, reach gas production and shaft bottom production The equilibrium state of water, realizes high and stable yields of the natural gas well under blowing state.
Embodiment above cannot limit the protection domain of the invention, and the personnel of professional skill field are not departing from In the case of the invention general idea, the impartial modification and change done, still fall within the scope that the invention is covered Within.

Claims (6)

1. a kind of totally-enclosed mixes defeated decompression circulation gas lift system, including christmas tree, the christmas tree are provided with and oil jacket annular space(1) The bushing pipeline of connection and and oil pipe(2)The oil pipe pipeline of connection and with bushing pipeline and the outer defeated pipe of oil pipe pipeline connection Road, the end of the multi-purpose station pipeline is outer defeated interface tube(3), it is characterised in that the system further includes gaslift mechanism, the gaslift Mechanism includes gas-purification mechanism and gas boosting mechanism;The gas-purification mechanism has air inlet, gas outlet and liquid outlet, The air inlet of the gas-purification mechanism connects the oil pipe pipeline, and gas outlet connects the air inlet of the gas boosting mechanism, goes out liquid Mouth connects the multi-purpose station pipeline, and the gas outlet of the gas boosting mechanism connects described sleeve pipe pipeline.
2. totally-enclosed according to claim 1 mixes defeated decompression circulation gas lift system, it is characterised in that the gas-purification machine Structure includes air inlet separation buffer tank(4), whirlpool separator(5), cyclone separator(6), filter(7), moisture content adsorption tanks(8)、 Accurate filter(9), plunger pump(11)And gas fluid mixture pump(12);The gas boosting mechanism includes gas compressor(10); The air inlet separation buffer tank(4)Air inlet connect the oil pipe pipeline, gas outlet connects the whirlpool separator(5)Air inlet Mouthful, liquid outlet connects the gas fluid mixture pump(12)Inlet;The whirlpool separator(5)Gas outlet connect the cyclonic separation Device(6)Inlet end, liquid outlet connects the plunger pump(11)Inlet;The cyclone separator(6)Gas outlet connect it is described Filter(7)Air inlet, liquid outlet connects the plunger pump(11)Inlet;The filter(7)Gas outlet connect it is described Moisture content adsorption tanks(8)Air inlet, liquid outlet connects the plunger pump(11)Inlet;The moisture content adsorption tanks(8)Outlet Mouth connects the accurate filter(9)Air inlet;The accurate filter(9)Gas outlet connect the gas compressor(10)'s Air inlet, liquid outlet connect the plunger pump(11)Inlet;The plunger pump(11)Liquid outlet and gas fluid mixture pump(12) Liquid outlet pass through first check-valve respectively(13)And second check-valve(14)Connect the multi-purpose station pipeline;The gas compressor (10)Gas outlet pass through the 3rd check-valves(15)Connect described sleeve pipe pipeline.
3. totally-enclosed according to claim 1 mixes defeated decompression circulation gas lift system, it is characterised in that the air inlet separation is slow Rush tank(4)Air inlet connect pressure valve in the christmas tree(16).
4. totally-enclosed according to claim 2 mixes defeated decompression circulation gas lift system, it is characterised in that the gas compressor (10)Gas outlet pass through the 3rd check-valves(15)Connect the casing valve in described sleeve pipe pipeline(17).
5. totally-enclosed according to claim 1 mixes defeated decompression circulation gas lift system, it is characterised in that the multi-purpose station pipeline connects Regulating valve in oil pipe pipeline(18).
6. totally-enclosed according to claim 1 mixes defeated decompression circulation gas lift system, it is characterised in that in the oil pipe pipeline It is provided with oil pressure transmitter(19), set pressure transmitter is provided with described sleeve pipe pipeline(20), it is provided with the multi-purpose station pipeline Flowmeter(21).
CN201711421130.2A 2017-12-25 2017-12-25 Full-closed mixed transportation depressurization circulating gas lift system Active CN108019190B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109025901A (en) * 2018-09-18 2018-12-18 中国石油集团西部钻探工程有限公司 Wellhead assembly is opened between gas well automation
CN110397424A (en) * 2019-07-11 2019-11-01 中国石油工程建设有限公司 A kind of deep water gas hydrates production system and method based on decompression exploitation
CN111042772A (en) * 2019-11-22 2020-04-21 中国石油天然气股份有限公司 Inter-well series connection drainage gas recovery device and drainage gas recovery method
CN112459748A (en) * 2020-11-05 2021-03-09 中国石油天然气股份有限公司 Single-point high-pressure gas lift drainage and gas increase process system and method
CN114412427A (en) * 2020-10-12 2022-04-29 北京星油科技有限公司 Gas lift and production integrated oil and gas exploitation system
CN114809991A (en) * 2022-04-14 2022-07-29 重庆非常规油气研究院有限公司 Shale gas well pressure-reducing and production-recovering method

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CN104234672A (en) * 2014-09-09 2014-12-24 汉纬尔机械(上海)有限公司 Compressor extraction system for natural gas well
CN204984367U (en) * 2015-06-26 2016-01-20 陕西龙门天地油气技术有限公司 Coal bed gas ground air water is with adopting device
CN207750066U (en) * 2017-12-25 2018-08-21 中山乐满石油设备有限公司 A kind of totally-enclosed mixes defeated decompression cycle gas lift system

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CN1356451A (en) * 2002-01-11 2002-07-03 华北石油管理局钻井工艺研究院 Reverse cycle drilling method and equipment for oil well or gas well
CN202064905U (en) * 2011-05-13 2011-12-07 中国石油天然气股份有限公司 Gas lifting and liquid discharging device for vehicle natural gas compressor
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109025901A (en) * 2018-09-18 2018-12-18 中国石油集团西部钻探工程有限公司 Wellhead assembly is opened between gas well automation
CN110397424A (en) * 2019-07-11 2019-11-01 中国石油工程建设有限公司 A kind of deep water gas hydrates production system and method based on decompression exploitation
CN111042772A (en) * 2019-11-22 2020-04-21 中国石油天然气股份有限公司 Inter-well series connection drainage gas recovery device and drainage gas recovery method
CN114412427A (en) * 2020-10-12 2022-04-29 北京星油科技有限公司 Gas lift and production integrated oil and gas exploitation system
CN114412427B (en) * 2020-10-12 2023-11-14 北京星油科技有限公司 Gas lift and production integrated oil gas exploitation system
CN112459748A (en) * 2020-11-05 2021-03-09 中国石油天然气股份有限公司 Single-point high-pressure gas lift drainage and gas increase process system and method
CN114809991A (en) * 2022-04-14 2022-07-29 重庆非常规油气研究院有限公司 Shale gas well pressure-reducing and production-recovering method

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