CN102747998A - Shale gas production increasing method and shale gas production increasing equipment - Google Patents
Shale gas production increasing method and shale gas production increasing equipment Download PDFInfo
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- CN102747998A CN102747998A CN2012102270881A CN201210227088A CN102747998A CN 102747998 A CN102747998 A CN 102747998A CN 2012102270881 A CN2012102270881 A CN 2012102270881A CN 201210227088 A CN201210227088 A CN 201210227088A CN 102747998 A CN102747998 A CN 102747998A
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Abstract
The invention provides a shale gas production increasing method and shale gas production increasing equipment. The shale gas production increasing method comprises the following steps of: transmitting heat energy to a shale layer of a shale gas well and raising the temperature of the shale layer by driving transmitted heat energy to realize heat transfer in the shale layer; closing shale gas well for 1-10 days; and opening the shale gas well to exploit gas. The invention also provides two kinds of shale gas production increasing equipment for realizing the shale gas production increasing method. According to the shale gas production increasing method and the shale gas production increasing equipment, the various problems in the conventional shale gas exploitation are solved, the shale gas desorption velocity and the seepage velocity are effectively increased, and further the shale gas yield is improved. The shale gas production increasing method provided by the invention is suitable for shale gas development of straight wells, horizontal wells or multi-branch wells.
Description
Technical field
The present invention relates to the shale gas production technique, relate in particular to a kind of shale gas raising the output method and shale gas yield-increasing apparatus.
Background technology
Shale gas is to compose to be stored in the natural gas in dark-coloured mud shale layer or the high-carbon mud shale layer; It can be created on various each stages of organic origin; A natural gas part is present in crack, rammell, rammell hole and other reservoir space with free phase (about 50%), and another part is present in kerogen, clay particle and clay pore surface with adsorbed state (about 50%).Shale gas is valuable resource, the energy and the industrial chemicals of high-quality, and what can be used as conventional gas takes over the energy or the additional energy.
Existing shale gas exploitation mainly be to rely on himself desorb, after gas production a period of time, the output of shale gas sharply reduces, the effect of shale gas exploitation is undesirable, yields poorly, output is unstable, can not reach the commercial development standard.The low reason of shale gas exploitation gas production mainly is: compare with conventional gas, the storing mode of shale gas is to be adsorbed as master, reservoir energy low (pressure is low), poor permeability, and the output process of shale gas is first desorb, then seepage flow in pore media.Only rely on very high gas production and the recovery ratio of the difficult acquisition of self desorb, necessary searching and research improve the new method of exploitation rate (or producing tolerance daily) and recovery ratio.
In order to improve the recovery ratio of shale gas, can yield poorly in commercial development standard (1000 meters of individual wells at the shale air to open
3/ day) time, take well stimulation.Existing well stimulation mainly adopts fracturing to carry out reservoir reconstruction.Its principle is through ground pump truck fracturing fluid to be pumped into the shaft bottom, and high pressure fracturing fluid pressure break in the shale gas reservoir goes out one or more crack, thereby more passage is provided for the seepage flow of shale gas.Though this method has increased seepage channel, the shale gas of part desorb is flowed out, fundamentally do not quicken the desorb of ADSORPTION STATE shale gas, effect of increasing production is limited.The equipment investment of this shale gas raising the output is big, operating cost is high, has also limited its extensive use.
In addition, also has a kind of raising the output method: CO to shale gas
2Absorption method, this method is to utilize CO
2Have than methane (CH
4) high adsorptivity, inject CO to the rammell
2, squeeze methane or change its characterization of adsorption.This method is suitably step-down also, CH in the step-down process
4Desorb, CO
2Have strong adsorptivity and occupy CH
4The position, thereby make CH
4Keep free state.Detailed process is: producing well is opened the step-down of shale gas well, injects well and injects CO
2, CH after the step-down
4Desorb is a free state, CO
2Absorption.Increase injection pressure then, CH
4Flow of pore is from the gas well output along the rammell.After producing a period of time according to the method described above, step-down once more, the injection and the output of carrying out next circulation.But because the step-down process is at producing well, and CO
2Be to inject the well injection, causing CH
4With CO
2Competition possibly not take place simultaneously, because the effective time that shale gas is produced has been shortened in the circulation repeatedly with step-down of boosting, therefore can not improve daily output tolerance very significantly in addition.And this raising the output method complex equipments, preparation cost is high, also makes it only stay in the laboratory research stage.
To sum up, existing shale gas raising the output method all can't realize the raising the output of shale gas fast and effectively, simultaneously, does not also have shale gas yield-increasing apparatus economically and reasonably.So demand a kind of shale gas raising the output method effectively and yield-increasing apparatus urgently, and then improve shale gas output.
Summary of the invention
The objective of the invention is to,, propose a kind of shale gas raising the output method,, and then improve shale gas output with raising shale gas desorption rate and seepage velocity to above-mentioned shale gas development problem.
For realizing above-mentioned purpose; The technical scheme that the present invention adopts is: a kind of shale gas raising the output method; May further comprise the steps: (1), carry heat energy to the rammell of shale gas well, and the heat energy of carrying through ordering about realizes that in the rammell heat transmission makes rammell temperature rising; (2), closed the shale gas well 1-10 days; (3), open the gas production of shale gas well.
Further, realizing the heat transmission and make with the shale gas well is 20-30 ℃ of rammell average temperature rising in 50 meters scopes of center of circle radius.
Further, the said time of closing the shale gas well is 1-2 days, waits for that heat further transmits diffusion.
Further, said conveying heat energy comprises superheated vapour heating or heating using microwave.
Further, said superheated vapour heating means are: inject superheated vapour to rammell, shale gas place, superheated vapour is generally 100-300 ℃, and the individual well steam injection pressure of superheated vapour is than the high 1-2MPa of rammell pore pressure, and steam injection rate is 5-10m
3/ h water equivalent superheated vapour makes the superheated vapour mass dryness fraction that gets into rammell, shale gas place greater than 50%.When the superheated vapour mass dryness fraction less than 50% the time, not good to the heats of shale gas, the shale gas resolution speed does not reach requirement.
Further, it is that every meter shale bed thickness is annotated 5 ~ 15 tons of water equivalent superheated vapours that said superheated vapour injects total amount, or 8 ~ 12 tons of water equivalent superheated vapours.
Further, said heating using microwave is for adopting rammell, microwave generator launched microwave heating shale gas place.Said microwave frequency is 1MHZ-10GHZ, or said microwave frequency 2MHZ-5GHZ; Said microwave generator power is 100 kilowatts-800 kilowatts, or said microwave generator power is 300 kilowatts-500 kilowatts.
Another object of the present invention is also to have proposed a kind of shale gas yield-increasing apparatus, when being used for the shale gas raising the output, can realize the shale gas raising the output fast and effectively.
For realizing above-mentioned purpose; The technical scheme that the present invention adopts is: a kind of shale gas yield-increasing apparatus; Comprise steam generator, injection pump, interior pipe and be set in the pipe outside and be fixed on the outer tube on the shale gas well inwall; The arrival end of said injection pump is communicated with steam generator, and the port of export of said injection pump is communicated with interior pipe.Said outer tube upper end is used for fixing the shale gas well borehole wall, is arranged in rammell, shale gas place one end and passage is provided for the shale gas that parses from the rammell, make shale gas after the parsing import in the pipe.
Further, said interior pipe is stainless steel tube or plastic inner lining pipe.Like petroleum industry oil pipe commonly used.
Further, said interior pipe arranged outside has isolation layer, prevents that superheated vapour heat before not reaching rammell, shale gas place scatters and disappears.
Further, said isolation layer is heat-barrier material (like the polymeric foamed material) layer in the pipe outside in being coated on; Or
Be arranged on layer of inert or blanket of nitrogen between said interior pipe and outer tube.
Further, said interior pipe and outer tube are positioned at a section of rammell, shale gas place, all offer sieve aperture.
Another object of the present invention is also to have proposed a kind of shale gas yield-increasing apparatus, realizes the shale gas raising the output fast and effectively.
For realizing above-mentioned purpose; The technical scheme that the present invention adopts is: a kind of shale gas yield-increasing apparatus; Comprise microwave generator, power supply, interior pipe and be set in the pipe outside and be fixed on the outer tube on the shale gas well inwall; Pipe lower end in said microwave generator detachably is fixed on, and with power supply Electricity Federation, corresponding with the microwave generator microwave launch hole that is provided with on the said outer tube.Said outer tube upper end is used for fixing shale gas well inwall, and said microwave launch hole is used to make the microwave of microwave generator emission to pass through, and passage is provided also can for the shale gas of resolving in the rammell, and the shale gas of parsing is imported in the interior pipe.
Further, said microwave generator comprises pedestal and two above microwave emitting heads, and said two above microwave emitting heads are distributed on the pedestal, can be around it and the downside launched microwave.The microwave frequency of said microwave generator emission is 1MHZ-10GHZ; Said microwave generator power is 100 kilowatts-800 kilowatts.
Further, said interior pipe is stainless steel tube or plastic inner lining pipe, like oil pipe.
Further, pipe is provided with sieve aperture near a section of microwave generator in said.
Further, said outer tube is positioned at a section of rammell, shale gas place and is provided with sieve aperture, for the shale gas of resolving provides more circulation passage.
Operating principle of the present invention: carry heat energy (superheated vapour heating or heating using microwave) to the rammell of shale gas well; And the heat energy of carrying through ordering about realizes that in the rammell heat transmission raises shale gas institute rammell temperature; Make the shale gas that is ADSORPTION STATE (methane) desorb rapidly that is adsorbed on the rammell, become free state.Along with heat transmits to the deep, rammell, a large amount of shale gas desorbs are free state, and the shale gas of free state is expanded by heating again.When opening the production of shale gas well, the rapid output of the shale gas of these free states, thus improve the shale gas well yield significantly.
The shale gas raising the output is selected to adopt which kind of heat energy, mainly considers based on combined factors such as injection scale, equipment investment, operating costs.General steam-heated input is high, but heat is also high, and effect of increasing production is best; The characteristics of heating using microwave are that equipment investment is little, and applying flexible is convenient, are suitable for the test of small-sized gas field or well group.
Shale gas normally is present in the rammell pore surface with adsorbed state, and its output will pass through desorb, diffusion and three processes of seepage flow at least, and wherein desorption rate and seepage velocity are the principal elements of decision aerogenesis speed.Shale gas raising the output method of the present invention through injecting heat energy to rock stratum, shale gas place, increases the free energy of ADSORPTION STATE shale gas (methane), thereby improves the speed of methane desorb from the pore surface of rammell; It is mobile that the shale gas expanded by heating quickens seepage flow simultaneously, thereby reach the purpose that increases substantially shale gas output, realizes the industrialized developing of shale gas; Adopt shale gas raising the output method of the present invention exploitation shale gas have flexibly, reliable, invest little characteristics.The shale gas exploitation that the present invention provides a kind of shale gas raising the output method to be suitable for straight well, horizontal well or multilateral well.
Description of drawings
Fig. 1 is superheated vapour heating sketch map of the present invention;
Fig. 2 is superheated vapour heating exploitation sketch map of the present invention;
Fig. 3 is a heating using microwave sketch map of the present invention;
Fig. 4 is heating using microwave exploitation sketch map of the present invention;
Fig. 5 is the vertical view of microwave generator among Fig. 3.
The specific embodiment
Fig. 1 is superheated vapour heating sketch map of the present invention; Fig. 2 is superheated vapour heating exploitation sketch map of the present invention.
Need the shale gas of exploitation to belong to about 1000 meters of rammell buried depth in the present embodiment, about 50 ℃ of rammell, shale gas place original temperature.The shale gas well is through after the normal gas production of a period of time, when the individual well daily output is lower than the commercial development standard (1000 meters
3/ day), adopt shale gas raising the output method to continue the exploitation shale gas, be specially and adopt superheated vapour method (also claim superheated vapour handle up) exploitation shale gas, may further comprise the steps:
(1), carry heat energy, and the heat energy of carrying through ordering about realizes that in rammell 4 the heat transmission makes rammell temperature rising to the rammell of shale gas well 4; Particularly; Through the superheated vapour that injection pump 2 produces to rammell, shale gas place 4 steam in jection generators 1, rammell 4, heating shale gas place, the superheated vapour temperature is 180-200 ℃; The individual well steam injection pressure is than the high 1MPa of rammell pore pressure, and steam injection rate is 5-7m
3/ h water equivalent superheated vapour makes the superheated vapour mass dryness fraction that gets into rammell, shale gas place greater than 60%.Superheated vapour injects total amount: every meter shale bed thickness is annotated 10 tons of water equivalent superheated vapours, and making with the shale gas well is that the rammell average temperature raises 20 ℃ in 50 meters scopes of center of circle radius.Heating-up temperature should not be too high, pushes shale gas to well far away area to prevent superheated vapour when heating hot fluid;
(2), closed the shale gas well 2 days, the effect of closing the shale gas well is to prevent that heat scatters and disappears, and makes the heat of injection in the rammell, further transmit diffusion, uniformity of temperature profile within the specific limits;
(3), open the gas production of shale gas well: the shale gas (methane) of the free state of a large amount of high temperature flows into outer tube 5 and interior pipe 3 successively by rammell, well far away area, carries through interior pipe 3 to arrive ground remittance shale gas gas transmission line.
The shale gas that is adsorbed in the rammell is after being heated by superheated vapour, and the desorption rate of shale gas improves, and adsorption capacity reduces greatly; At heat energy shale gas expanded by heating in the process that transmit the rammell, help setting up producing pressure differential, thereby increase the gas well daily output significantly simultaneously.Original formation temperature is about 50 ℃ in the present embodiment; The rammell average temperature can reach 70 ℃ in 50 meters scopes of heating back shale gas shaft bottom radius; This moment, the adsorption capacity of rammell was reduced to original about 1/7 approximately; Desorption rate improves about 7 times, and the gas well daily output improves about 7 times (more not before the raising the output, down together).
Different with embodiment 1 is, the superheated vapour temperature is 250 ℃ in the present embodiment, and the individual well steam injection pressure is than the high 1MPa of rammell pore pressure, and steam injection rate is 10m
3/ h water equivalent superheated vapour makes the superheated vapour mass dryness fraction that gets into rammell, shale gas place greater than 60%.It is that every meter shale bed thickness is annotated 15 tons of water equivalent water vapours that superheated vapour injects total amount, and making with the shale gas well is that the rammell average temperature raises 30 ℃ in 50 meters scopes of center of circle radius.
Original formation temperature is about 50 ℃ in the present embodiment; The rammell average temperature can reach 80 ℃ in 50 meters scopes of heating back shale gas shaft bottom radius; This moment, the adsorption capacity of rammell was reduced to original approximately 1/10 approximately, and desorption rate improves about 10 times, and the gas well daily output improves about 10 times.
Fig. 3 is a heating using microwave sketch map of the present invention; Fig. 4 is heating using microwave exploitation sketch map of the present invention.
Need the shale gas of exploitation to belong to about 800 meters of rammell buried depth, about 40 ℃ of rammell original temperature in the present embodiment.The shale gas well is through after the normal gas production of a period of time, when the individual well daily output is lower than the commercial development standard (1000 meters
3/ day).Adopt shale gas raising the output method to continue the exploitation shale gas, be specially the method exploitation shale gas that adopts heating using microwave, may further comprise the steps:
(1), carry heat energy, and the heat energy of carrying through ordering about realizes that in rammell 4 the heat transmission makes rammell temperature rising to the rammell of shale gas well 4; Particularly; Microwave generator 7 is placed rammell 4, shale gas place; Is microwave generator 7 power supplies through power supply 6 through cable 8, rammell 4, microwave generator 7 launched microwaves heating shale gas place, and making with the shale gas well is that the rammell average temperature raises 20 ℃ in 50 meters scopes of center of circle radius; Microwave frequency is 300MHZ; The power of microwave generator is 2500 kilowatts;
(2), closed the shale gas well 1-2 days;
(3), open the gas production of shale gas well.Because rammell, shale gas place temperature improves, and has quickened the desorb of shale gas, adds the thermal expansion of shale gas, makes shale gas add flow speed and direction shale gas well by the rammell, through outer tube 5 and interior pipe 3, is transported to ground through interior pipe successively, and imports gas line network.
Present embodiment applies heat energy through microwave generator 7 is set in the shaft bottom to shale gas; Make free energy increase, desorption rate raising, the expanded by heating of ADSORPTION STATE shale gas; And the moisture in the evaporation rammell improves the vapor phase stream kinetic force, 6 ~ 8 times of raising shale gas individual well daily output.
Different with embodiment 3 is, present embodiment is through adopting rammell, microwave generator launched microwave heating shale gas place, and making with the shale gas well is that the rammell average temperature raises 30 ℃ in 50 meters scopes of center of circle radius; Microwave frequency is 300MHZ; The power of microwave generator is 4000 kilowatts; Closed the shale gas well 1-2 days; Open the gas production of shale gas well, improve 9 ~ 10 times of shale gas individual well daily output.
Fig. 1 is superheated vapour heating sketch map of the present invention; Fig. 2 is superheated vapour heating exploitation sketch map of the present invention.
Present embodiment discloses a kind of equipment of shale gas raising the output; As depicted in figs. 1 and 2; Comprise steam generator 1, injection pump 2, interior pipe 3 and be set in pipe 3 outsides and be fixed on the outer tube 5 on the shale gas well inwall; The arrival end of injection pump 2 is communicated with steam generator 1, and the port of export of injection pump 2 is communicated with interior pipe 3.
Present embodiment middle external tube 5 is positioned at one section sieve aperture that is provided with as superheated vapour and shale gas passage of rammell 4, shale gas place.Outer tube 5 upper ends are used for fixing the shale gas well borehole wall, and it is arranged in rammell, shale gas place one end and passage is provided for from the rammell 4 shale gas that parse, and then in importing in the pipe 3.
The operating principle of the equipment of present embodiment shale gas raising the output: the superheated vapour that steam generator 1 is produced through injection pump 2 feeds interior pipe 3; Under the protection of interior pipe 3 lateral septal thermospheres; The thermal loss of superheated vapour is less; Superheated vapour is transported to rammell 4, shale gas place through sieve aperture on the pipe 3 in being arranged on and the sieve aperture on the outer tube successively, belongs to realization heat transmission in the rammell 4 and rammell 4 temperature are raise at shale gas; When being in 50 meters scopes of the center of circle radius during 20-30 ℃ of rammell average temperature rising with the shale gas well, stop to carry superheated vapour; Closed the shale gas well 1-10 days; Shale gas resolution speed in the heated rammell 4 improves, and expanded by heating, flows to the shale gas well, successively through being arranged on sieve aperture and the sieve aperture on the interior pipe 3 on the outer tube 5, pipe 3 in getting into; Open the gas well gas production, flow to ground, and import the shale gas gas line network through interior pipe 3.
The raising the output method of the employing superheated vapour heating shale gas of embodiment 1 and embodiment 2 all can adopt this equipment to accomplish.
Fig. 3 is a heating using microwave sketch map of the present invention; Fig. 4 is heating using microwave exploitation sketch map of the present invention; Fig. 5 is the vertical view of microwave generator among Fig. 3.
Present embodiment discloses a kind of equipment that is used to realize the shale gas raising the output, like Fig. 3 and shown in Figure 4, comprises microwave generator 7, power supply 6, interior pipe 3 be set in pipe 3 outsides and be fixed on the outer tube 5 on the shale gas well inwall.Pipe 3 lower ends in microwave generator 7 detachably is fixed on through bolt, microwave generator 7 is through cable 8 and power supply 6 Electricity Federations; Corresponding with the microwave generator 7 microwave launch hole that is provided with on the outer tube 5.
As shown in Figure 5, the microwave generator that present embodiment adopted comprises that column pedestal and 10,8 microwave emitting heads 10 of 8 microwave emitting heads are distributed on the circumference of column pedestal, makes microwave emitting head 10 over against rammell 4, shale gas place.The number of general microwave emitting head 10 need and be decided according to the power and the shale gas exploitation of microwave emitting head.
Present embodiment middle external tube 5 is positioned at a section of rammell 4, shale gas place and is provided with sieve aperture, for the shale gas of resolving provides more circulation passage.Outer tube 5 upper ends are used for fixing the shale gas well borehole wall.
The job step of present embodiment shale gas yield-increasing apparatus: the lower end that microwave generator 7 is fixed on interior pipe 3; Carry in the entering shale gas well by interior pipe 3; And placing rammell, shale gas place, energized 6 starts microwave generator 7 to rammell, shale gas place 4 launched microwaves; Microwave passes the microwave launch hole on the outer tube 5, in rammell 4, realizes the heat transmission and rammell 4 temperature are raise; When with the shale gas well being 20-30 ℃ of rammell average temperature rising in 50 meters scopes of center of circle radius, close the power supply of microwave generator 7; Closed the shale gas well 1-2 days; Shale gas resolution speed in the heated rammell 4 improves, and expanded by heating, passes through sieve aperture and the sieve aperture of interior pipe 3 on the outer tube 5 successively, in the pipe 3, opens the gas production of shale gas well in shale gas flow into, and flows to ground through interior pipe 3, and imports the shale gas gas line network.
The employing of embodiment 3 and embodiment 4 the raising the output method of microwave emission heating shale gas all can adopt this equipment to accomplish.
What should explain at last is: above each embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although the present invention has been carried out detailed explanation with reference to aforementioned each embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, perhaps to wherein part or all technical characteristic are equal to replacement; And these are revised or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (15)
1. a shale gas raising the output method is characterized in that, may further comprise the steps: (1), carry heat energy to the rammell of shale gas well, and the heat energy of carrying through ordering about realizes that in the rammell heat transmission makes rammell temperature rising; (2), closed the shale gas well 1-10 days; (3), open the gas production of shale gas well.
2. according to the said shale gas of claim 1 raising the output method, it is characterized in that realizing the heat transmission and making with the shale gas well is 20-30 ℃ of rammell average temperature rising in 50 meters scopes of center of circle radius.
3. according to the said shale gas of claim 1 raising the output method, it is characterized in that the said time of closing the shale gas well is 1-2 days.
4. according to the said shale gas of claim 1 raising the output method, it is characterized in that said conveying heat energy comprises superheated vapour heating or heating using microwave.
5. according to the said shale gas of claim 4 raising the output method; It is characterized in that; Said superheated vapour heating means are: inject superheated vapour to rammell, shale gas place, the individual well steam injection pressure of superheated vapour is than the high 1-2MPa of rammell pore pressure, and steam injection rate is 5-10m
3/ h water equivalent superheated vapour makes the superheated vapour mass dryness fraction that gets into rammell, shale gas place greater than 50%.
6. according to claim 4 or 5 said shale gas raising the output methods, it is characterized in that it is that every meter shale bed thickness is annotated 5 ~ 15 tons of water equivalent superheated vapours that said superheated vapour injects total amount.
7. according to the said shale gas of claim 1 raising the output method, it is characterized in that said heating using microwave is for adopting rammell, microwave generator launched microwave heating shale gas place, said microwave frequency is 1MHZ-10GHZ; Said microwave generator power is 100 kilowatts-800 kilowatts.
8. the equipment of shale gas raising the output; It is characterized in that; Comprise steam generator, injection pump, interior pipe and be set in the pipe outside and be fixed on the outer tube on the shale gas well inwall, the arrival end of said injection pump is communicated with steam generator, the port of export of said injection pump is communicated with interior pipe.
9. said according to Claim 8 shale gas yield-increasing apparatus is characterized in that, said interior pipe is stainless steel tube or plastic inner lining pipe.
10. according to Claim 8 or 9 said shale gas yield-increasing apparatus, it is characterized in that, said in the pipe arranged outside isolation layer is arranged, said isolation layer is the insulation material layer in the pipe outside in being coated on; Or
Be arranged on layer of inert or blanket of nitrogen between said interior pipe and outer tube.
11. according to Claim 8 or 9 said shale gas yield-increasing apparatus, it is characterized in that, said in pipe and outer tube be positioned at shale gas and belong to a section of rammell, all offer sieve aperture.
12. the equipment of a shale gas raising the output; It is characterized in that; Comprise microwave generator, power supply, interior pipe and be set in the pipe outside and be fixed on the outer tube on the shale gas well inwall; Pipe lower end in said microwave generator detachably is fixed on, and with power supply Electricity Federation, corresponding with the microwave generator microwave launch hole that is provided with on the said outer tube.
13., it is characterized in that said microwave generator comprises pedestal and two above microwave emitting heads according to the said shale gas yield-increasing apparatus of claim 12, said two above microwave emitting heads are distributed on the pedestal.
14., it is characterized in that said interior pipe is stainless steel tube or plastic inner lining pipe according to the said shale gas yield-increasing apparatus of claim 12.
15. according to claim 12 or 14 said shale gas yield-increasing apparatus, it is characterized in that, said in pipe be provided with sieve aperture near a section of microwave generator, said outer tube is positioned at a section of rammell, shale gas place and is provided with sieve aperture.
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| CN105507859A (en) * | 2015-11-24 | 2016-04-20 | 西南石油大学 | Method for desorption excitation of adsorbed shale gas |
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| CN105822275A (en) * | 2016-01-12 | 2016-08-03 | 中国石油大学(华东) | Fracturing fracture-forming technique and method for shale |
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| CN106884637A (en) * | 2017-03-29 | 2017-06-23 | 中国石油大学(华东) | Shale gas thermal process and system |
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| CN110159241A (en) * | 2019-06-25 | 2019-08-23 | 中国矿业大学(北京) | A kind of microwave irradiation cooperates with the device of exploitation shale gas with hydraulic fracturing |
| CN117371069A (en) * | 2023-12-07 | 2024-01-09 | 中国石油大学(华东) | Method and system for optimizing filling scheme of single-layer-drive streamline regulator of vertical and inclined well group |
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