CN205117321U - Super supercritical carbon dioxide , nitrogen gas, compound fracturing system of water conservancy - Google Patents
Super supercritical carbon dioxide , nitrogen gas, compound fracturing system of water conservancy Download PDFInfo
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- CN205117321U CN205117321U CN201520998367.7U CN201520998367U CN205117321U CN 205117321 U CN205117321 U CN 205117321U CN 201520998367 U CN201520998367 U CN 201520998367U CN 205117321 U CN205117321 U CN 205117321U
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Abstract
The utility model provides a super supercritical carbon dioxide, nitrogen gas, compound fracturing system of water conservancy. This system includes the N2 jar, the CO2 jar, the exit end of CO2 jar connects gradually the having heaters through the pipeline, the booster pump, glutinous ware is transferred in the stirring, the exit end of N2 jar passes through pipeline connection with the entry end of heater, install control valve A on the pipeline between N2 jar entry end and the CO2 jar entry end in proper order, the air separation ware, control valve B, another entry end of booster pump has connected gradually water base fracturing fluid reservoir through the pipeline, liquid separator, shale gas separator, air compressor, the cooler, the exit end of cooler and the entry end of air separation ware intercommunication, another entry end of liquid separator has the solid separator through the pipeline intercommunication, unload the press pump. This three kind novel fracturing mode active junctions together, complementary inferior position, environmental pollution is little, and the liquid of extraction and gas can all secondary cyclic utilization, process flow is simple, and process loss material is less.
Description
Technical field
The utility model relates to collection and the gas recovery techniques field of shale gas, is specifically related to supercritical carbon dioxide, nitrogen, waterpower composite fracturing system.
Background technology
The gas production of current oil field adopts critical carbon dioxide pressure break, the process that critical carbon dioxide pressure break is converted to gaseous state is extremely short, volume sharply expands, easy generation accident, need when drilling fracturing operation to adopt special well control equipment, mining site construction simultaneously needs strict temperature control, pressure, higher to facility requirements, adds the cost of Contraction in Site.Due to shale height argillaceous, clay mineral is met water hydratable and is expanded, and easily blocks the crack pressed off.Meanwhile, fracturing water consumption is comparatively large, is all a no small pressure to resource, to environment.Gas phase in foam fracturing has kinetic energy and potential energy, and conventional fracturing fluid system only has kinetic energy and do not have potential energy, thus conventional fracturing fluid construction safety; Meanwhile, construction friction more conventional pressure break height 20%-50% during foam fracturing fluid construction, if forming section foam in pit shaft in addition, then head of liquid also will reduce, and will increase construct infusion pressure and construction risk; Meanwhile, liquid gas storage and transport also have certain unsafe factor.
Utility model content:
In order to solve the problems of the technologies described above, the utility model proposes supercritical carbon dioxide, nitrogen, waterpower composite fracturing system, this novel employing three kinds of pressure break modes effectively combine, complementary inferior position; Environment pollution is little, and the liquid of extraction and gas can secondary cycle utilize; Technological process is simple, and process loss material is less; According to the ageing difference of the of the fracturing fluid viscosity of difference, can judge rationally to inject whether reach optimum efficiency of the fracturing fluid opportunity.
The technical solution of the utility model is: this supercritical carbon dioxide, nitrogen, waterpower composite fracturing system comprise N
2tank, CO
2tank, CO
2the port of export of tank is connected with heater, booster pump, the glutinous device of stirring tune in turn by pipeline, stirs and adjusts the port of export of glutinous device to have pipeline to be connected to pit shaft, N
2the port of export of tank is connected by pipeline with the arrival end of heater, N
2tank arrival end and CO
2pipeline between tank arrival end is provided with successively control valve A, air separator, control valve B, another arrival end of booster pump is connected with water-based fracturing flow container, liquid separator, shale gas eliminator, air compressor, cooler in turn by pipeline, the port of export of cooler is communicated with the arrival end of air separator, and another arrival end of liquid separator is communicated with solid separator, depressurizing pump by pipeline.
Mulling pump on the pipeline adjusting the port of export sticking device is stirred in such scheme.N
2pipeline between the tank port of export and calorifier inlets end is provided with control valve C, CO
2pipeline between the tank port of export and calorifier inlets end is provided with control valve D, pipeline between heater and booster pump is provided with control valve E, booster pump and stirring are adjusted on the pipeline between glutinous device and are provided with control valve F, stir to adjust on the pipeline between the arrival end of glutinous device and the port of export and control valve G is installed, the pipeline of mulling pump discharge end is provided with control valve H, pipeline between water-based fracturing flow container and liquid separator is provided with control valve K, the pipeline between booster pump and water-based fracturing flow container is provided with control valve L.
The utility model has following beneficial effect: the utility model is in view of the limitation of traditional fracturing, and major design supercritical carbon dioxide, nitrogen pressure break hydraulic pressure split and a whole set of frac system of fracturing " three-in-one " carries out pressure break.And make a set of rational fracturing technology for shale gas-bearing formation.The hydraulic fracturing technology single with tradition, adopts supercritical carbon dioxide pressure break, the mode of nitrogen foam fracturing fluid pressure break and fracturing " three-in-one " carries out pressure break to shale gas reservoir, be conducive to the raising of shale gas output.And analyze under what circumstances, adopt which kind of pressure break mode the most suitable, gas production is high, and of the fracturing fluid cyclic utilization rate is high.Meanwhile, according to the ageing difference of the of the fracturing fluid viscosity of difference, judge rationally to inject whether reach optimum efficiency of the fracturing fluid opportunity.
Accompanying drawing illustrates:
Accompanying drawing 1 is structural representation of the present utility model.
In figure: 1-control valve A; 2-control valve B; 3-control valve C; 4-control valve D; 5-control valve E; 6-control valve G; 7-control valve F; 8-control valve H; 9-control valve K; 10-control valve L; 11-CO
2tank; 12-heater; 13-booster pump; 14-stirs and adjusts glutinous device; 15-mulling pump; 16-viscosity detector; 17-depressurizing pump; 18-solid separator; 19-water-based fracturing flow container; 20-liquid separator; 21-shale gas eliminator; 22-air compressor; 23-cooler; 24-air separator; 25-N
2tank.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, this supercritical carbon dioxide, nitrogen, waterpower composite fracturing system: comprise N
2tank 25, CO
2tank 11, CO
2the port of export of tank 11 is connected with heater 12, booster pump 13 in turn by pipeline, stirs and adjust glutinous device 14, and stir and adjust the port of export of glutinous device 14 to have pipeline to be connected to pit shaft, described heater 12 is by CO
2be heated to critically weighted, adjust glutinous device 14 by booster pump 13 and stirring, and in conjunction with the CO that mulling pump 15 will be under supercriticality
2be injected in stratum.The port of export of N2 tank 25 is connected by pipeline with the arrival end of heater 12, N2 tank 25 arrival end and CO
2pipeline between tank 11 arrival end is provided with successively control valve A1, air separator 24, control valve B2, described air separator 24, by being carried the gas of coming by cooler 23, isolates N
2and CO
2, complete whole loop structure.Another arrival end of booster pump 13 is connected with water-based fracturing flow container 19, liquid separator 20, shale gas eliminator 21, air compressor 22, cooler 23 in turn by pipeline, and wherein air compressor 22 feeding is simple, pollution-free.The formation gas processed via depressurizing pump 17, solid separator 18 and liquid separator 20 is isolated shale gas by described shale gas eliminator 21 further.The mixture that described water-based fracturing flow container 19 will be made up of jointly liquid separator 20 and secondary water, adds and puts swollen dose, is utilized for 13 2 times, enter stratum by booster pump.Described air compressor 22 compresses jointly by air and by the isolated gas of shale gas eliminator 21, in order to again recycling.The port of export of cooler 23 is communicated with the arrival end of air separator 24, and another arrival end of liquid separator 20 is communicated with solid separator 18, depressurizing pump 17 by pipeline.
Stir to adjust on the pipeline of the port of export of glutinous device 14 and be connected with mulling pump 15.Pipeline between N2 tank 25 port of export and heater 12 arrival end is provided with control valve C3, CO
2pipeline between tank 11 port of export and heater 12 arrival end is provided with control valve D4, pipeline between heater 12 and booster pump 13 is provided with control valve E5, booster pump 13 and stirring are adjusted on the pipeline between glutinous device 14 and are provided with control valve F7, stir to adjust on the pipeline between the arrival end of glutinous device 14 and the port of export and control valve G6 is installed, the pipeline of mulling pump 15 port of export is provided with control valve H8, pipeline between water-based fracturing flow container 19 and liquid separator 20 is provided with control valve K9, pipeline between booster pump 13 and water-based fracturing flow container 19 is provided with control valve L10.
Circulation frac system I, by CO
2control valve D4, the heater 12 of tank 11 and heater 12 junction are opened with the control valve E5 of booster pump 13 junction, liquid carbon dioxide enters heater 12 along pipeline and is heated to 31.1 DEG C-120 DEG C, enter booster pump 13 subsequently and be pressurized to more than 7.4MPa, formed and to open control valve F7 after supercritical carbon dioxide and enter to stir and adjust glutinous device 14 to stir, open mulling pump 15 control valve H8 simultaneously and inject proppant, enter the sleeve pipe in pit shaft along pipeline, thus reach pressure break place.Booster pump 13 is also that pressure break provides frac pressure.First discharge opeing of returning after pressure break completes enters the suitable pressure reduced in pit shaft of depressurizing pump 17, and object allows the supercritical carbon dioxide fracturing fluid returned in discharge opeing vaporize, and forms the carbon dioxide of gas.But release speed can not be too fast, otherwise easily cause returning discharge opeing due to pressure and can not arrange not; Enter solid separator 18 to be subsequently separated, be separated the solid impurity to shake out and so on, enter liquid separator 20 along pipeline after separation and be separated, carry out chemical treatment and remove impurity, water is drawn into water-based fracturing flow container 19; Remaining gas enters shale gas eliminator 21, isolate shale gas, remaining gas enters air compressor 22, carry out gas compression separation, air separator 24 is entered again through subcooler 23, open control valve A1 and control valve B2, the carbon dioxide finally separated and nitrogen enter respective storage cylinder respectively.
Circulation frac system II: by supercritical carbon dioxide and nitrogen foam fracturing fluid pressure break.By N
2control valve C3, the heater 12 of tank 25 and heater 12 junction are opened with the control valve E5 of booster pump 13 junction, and each by-pass valve control of last circulation is opened as usual simultaneously.Liquid carbon dioxide and nitrogen foam fracturing fluid enter heater 12 along pipeline and are heated to 31.1 DEG C-120 DEG C, enter booster pump 13 subsequently and be pressurized to more than 7.4MPa, formed and to open control valve F7 after supercritical carbon dioxide and enter to stir and adjust glutinous device 14 to stir, open mulling pump 15 simultaneously, control valve H8 injects proppant, enter the sleeve pipe in pit shaft along pipeline, thus reach pressure break place.Booster pump 13 is also for pressure break provides frac pressure.
First discharge opeing of returning after pressure break completes enters depressurizing pump and suitably reduces pressure in pit shaft, and object allows return supercritical carbon dioxide in discharge opeing and nitrogen foam fracturing fluid is vaporized, and forms carbon dioxide and the nitrogen of gas.But release speed can not be too fast, otherwise easily cause returning discharge opeing due to pressure and can not arrange not; Enter solid separator 18 to be subsequently separated, be separated the solid impurity to shake out and so on, enter liquid separator along pipeline after separation and be separated 20, carry out chemical treatment and remove impurity, water is drawn into water-based fracturing flow container 19; Remaining gas enters shale gas eliminator 21, isolate shale gas (mainly CH4), remaining gas enters air compressor 22, carry out gas compression separation, enter air separator 24 through subcooler 23 again, the carbon dioxide finally separated and nitrogen enter respective storage cylinder respectively.
Circulation frac system III: only utilize fracturing.First whether the fracturing fluid observed in water-based fracturing flow container 19 meets injection standard, if nonstandard needs add secondary water from opposite side; If meet standard, then first shut control valve C3, control valve D4, control valve E5, control valve F7, open control valve G6, control valve K9, control valve L10, aqueous fracturing fluid adds expansion-resisting agent and enters booster pump 13 along pipeline, booster pump 13 is pressurized to frac pressure, open mulling pump 15 control valve H8 simultaneously and inject proppant, enter the sleeve pipe in pit shaft along pipeline, thus reach pressure break place.Booster pump 13 is also for pressure break provides frac pressure.Described aqueous fracturing fluid can utilize seconary water use, saves water source, is also added with expansion-resisting agent simultaneously.
First discharge opeing of returning after pressure break completes enters depressurizing pump 17 and suitably reduces pressure in pit shaft, and this time release degree is than the circulating system I, II little, because this time without the need to making fracturing fluid vaporize; Containing nitrogen and carbon dioxide in the shale gas of extraction, enter solid separator 18 along pipeline and be separated proppant, enter liquid separator 20 subsequently, carry out chemical treatment and remove impurity, water is drawn into water-based fracturing flow container 19; Gas is then the same with the circulating system I, the circulating system II, remaining gas enters shale gas eliminator 21, isolate shale gas (mainly CH4), remaining gas enters air compressor 22, carry out gas compression separation, enter air separator 24 through subcooler 23 again, the carbon dioxide finally separated and nitrogen enter respective storage cylinder respectively.
In order to monitor formation breakdown point place viscosity B coefficent value.Formation breakdown point is connected to viscosity detector 16. by circuit limit
The application's environment pollution is little, and the liquid of extraction and gas can secondary cycle utilize.Technological process is simple, and process loss material is less.According to the ageing difference of the of the fracturing fluid viscosity of difference, can judge rationally to inject whether reach optimum efficiency of the fracturing fluid opportunity.Three kinds of pressure break modes effectively combine, complementary inferior position.
According to supercritical carbon dioxide, the of the fracturing fluid character of nitrogen foam and performance, early stage is used supercritical carbon dioxide pressure break in exploitation, along with the reduction of fracturing fluid viscosity, in mid-term, when viscosity drops to about 50%, nitrogen foam fracturing fluid is just taked to carry out pressure break or adopt supercritical carbon dioxide and nitrogen two end number mixing fracturing fluid; In the later stage due to the above two poor in timeliness, need to take fracturing.There is periods different so different fracturing process to follow, improve gas production.
Claims (3)
1. a supercritical carbon dioxide, nitrogen, waterpower composite fracturing system: comprise N2 tank (25), CO2 tank (11), it is characterized in that: the port of export of CO2 tank (11) is connected with heater (12) in turn by pipeline, booster pump (13), stir and adjust glutinous device (14), stir and adjust the port of export of glutinous device (14) to have pipeline to be connected to pit shaft, the port of export of N2 tank (25) is connected by pipeline with the arrival end of heater (12), pipeline between N2 tank (25) arrival end and CO2 tank (11) arrival end is provided with successively control valve A (1), air separator (24), control valve B (2), another arrival end of booster pump (13) is connected with water-based fracturing flow container (19) in turn by pipeline, liquid separator (20), shale gas eliminator (21), air compressor (22), cooler (23), the port of export of cooler (23) is communicated with the arrival end of air separator (24), another arrival end of liquid separator (20) is communicated with solid separator (18) by pipeline, depressurizing pump (17).
2. supercritical carbon dioxide according to claim 1, nitrogen, waterpower composite fracturing system, is characterized in that: mulling pump (15) on the pipeline of the port of export of the glutinous device (14) of stirring tune.
3. supercritical carbon dioxide according to claim 2, nitrogen, waterpower composite fracturing system, it is characterized in that: the pipeline between N2 tank (25) port of export and heater (12) arrival end is provided with control valve C (3), pipeline between CO2 tank (11) port of export and heater (12) arrival end is provided with control valve D (4), pipeline between heater (12) and booster pump (13) is provided with control valve E (5), booster pump (13) and stirring are adjusted on the pipeline between glutinous device (14) and are provided with control valve F (7), stir to adjust on the pipeline between the arrival end of glutinous device (14) and the port of export and control valve G (6) is installed, the pipeline of mulling pump (15) port of export is provided with control valve H (8), pipeline between water-based fracturing flow container (19) and liquid separator (20) is provided with control valve K (9), pipeline between booster pump (13) and water-based fracturing flow container (19) is provided with control valve L (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520998367.7U CN205117321U (en) | 2015-12-04 | 2015-12-04 | Super supercritical carbon dioxide , nitrogen gas, compound fracturing system of water conservancy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520998367.7U CN205117321U (en) | 2015-12-04 | 2015-12-04 | Super supercritical carbon dioxide , nitrogen gas, compound fracturing system of water conservancy |
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| CN205117321U true CN205117321U (en) | 2016-03-30 |
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|---|---|---|---|
| CN201520998367.7U Expired - Fee Related CN205117321U (en) | 2015-12-04 | 2015-12-04 | Super supercritical carbon dioxide , nitrogen gas, compound fracturing system of water conservancy |
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Cited By (10)
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| CN107060704A (en) * | 2017-02-14 | 2017-08-18 | 四川洁能锐思石油技术有限公司 | Supercritical CO2It is atomized deep penetration acid fracturing method |
| CN107246255A (en) * | 2017-07-26 | 2017-10-13 | 太原理工大学 | Supercritical CO2The analogue means and method of fracturing coal body are combined with hydraulic fracturing |
| CN107842351A (en) * | 2016-09-20 | 2018-03-27 | 中国石油大学(北京) | A kind of anhydrous energization composite fracturing method of liquefied petroleum air carbon dioxide |
| CN108760602A (en) * | 2018-05-30 | 2018-11-06 | 辽宁工程技术大学 | Utilize supercritical CO2The pilot system and method for anti-reflection Oil in Super-low Permeability densification shale |
| CN109906305A (en) * | 2016-10-14 | 2019-06-18 | 迪傲公司 | Electro-hydrodynamic frac system |
| CN112377166A (en) * | 2020-12-14 | 2021-02-19 | 西南石油大学 | Shale oil reservoir nitrogen-assisted carbon dioxide fracturing and development integrated method |
| CN112664176A (en) * | 2020-12-28 | 2021-04-16 | 西安交通大学 | Supercritical multi-element thermal fluid huff and puff oil production test simulation device and method |
| CN112832715A (en) * | 2021-01-07 | 2021-05-25 | 安徽理工大学 | Intelligent multiphase fracturing coupling carbon dioxide flooding coal bed gas extraction system |
| CN114909113A (en) * | 2022-06-08 | 2022-08-16 | 中国石油大学(华东) | Movable water-gas alternative gas injection device for shale oil exploitation |
| CN114961686A (en) * | 2022-07-05 | 2022-08-30 | 重庆朗福环保科技有限公司 | Carbon dioxide drives shale atmospheric pressure and splits device and system thereof |
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| CN107842351A (en) * | 2016-09-20 | 2018-03-27 | 中国石油大学(北京) | A kind of anhydrous energization composite fracturing method of liquefied petroleum air carbon dioxide |
| CN107842351B (en) * | 2016-09-20 | 2019-10-22 | 中国石油大学(北京) | A kind of anhydrous energization composite fracturing method of liquefied petroleum gas-carbon dioxide |
| CN109906305B (en) * | 2016-10-14 | 2021-05-25 | 迪傲公司 | Electric hydraulic fracturing system |
| CN109906305A (en) * | 2016-10-14 | 2019-06-18 | 迪傲公司 | Electro-hydrodynamic frac system |
| CN107060704B (en) * | 2017-02-14 | 2019-02-26 | 四川洁能锐思石油技术有限公司 | Supercritical CO2It is atomized deep penetration acid fracturing method |
| CN107060704A (en) * | 2017-02-14 | 2017-08-18 | 四川洁能锐思石油技术有限公司 | Supercritical CO2It is atomized deep penetration acid fracturing method |
| CN107246255A (en) * | 2017-07-26 | 2017-10-13 | 太原理工大学 | Supercritical CO2The analogue means and method of fracturing coal body are combined with hydraulic fracturing |
| CN107246255B (en) * | 2017-07-26 | 2019-03-26 | 太原理工大学 | Supercritical CO2With the simulator and method of the compound fracturing coal body of hydraulic fracturing |
| CN108760602A (en) * | 2018-05-30 | 2018-11-06 | 辽宁工程技术大学 | Utilize supercritical CO2The pilot system and method for anti-reflection Oil in Super-low Permeability densification shale |
| CN112377166A (en) * | 2020-12-14 | 2021-02-19 | 西南石油大学 | Shale oil reservoir nitrogen-assisted carbon dioxide fracturing and development integrated method |
| CN112377166B (en) * | 2020-12-14 | 2021-11-09 | 西南石油大学 | Shale oil reservoir nitrogen-assisted carbon dioxide fracturing and development integrated method |
| US11371328B1 (en) | 2020-12-14 | 2022-06-28 | Southwest Petroleum University | Integrated method for nitrogen-assisted carbon dioxide fracturing and development of shale oil reservoirs |
| CN112664176A (en) * | 2020-12-28 | 2021-04-16 | 西安交通大学 | Supercritical multi-element thermal fluid huff and puff oil production test simulation device and method |
| CN112664176B (en) * | 2020-12-28 | 2022-12-09 | 西安交通大学 | Supercritical multi-element thermal fluid huff and puff oil production test simulation device and method |
| CN112832715A (en) * | 2021-01-07 | 2021-05-25 | 安徽理工大学 | Intelligent multiphase fracturing coupling carbon dioxide flooding coal bed gas extraction system |
| CN114909113A (en) * | 2022-06-08 | 2022-08-16 | 中国石油大学(华东) | Movable water-gas alternative gas injection device for shale oil exploitation |
| CN114909113B (en) * | 2022-06-08 | 2023-11-24 | 长江大学 | Movable water-gas alternate gas injection device for shale oil exploitation |
| CN114961686A (en) * | 2022-07-05 | 2022-08-30 | 重庆朗福环保科技有限公司 | Carbon dioxide drives shale atmospheric pressure and splits device and system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20161204 |