CN113338888B - Method for promoting vertical shaft shale gas exploitation by horizontal branch well combustion explosion fracturing - Google Patents
Method for promoting vertical shaft shale gas exploitation by horizontal branch well combustion explosion fracturing Download PDFInfo
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- CN113338888B CN113338888B CN202110755442.7A CN202110755442A CN113338888B CN 113338888 B CN113338888 B CN 113338888B CN 202110755442 A CN202110755442 A CN 202110755442A CN 113338888 B CN113338888 B CN 113338888B
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- 238000004880 explosion Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000001737 promoting effect Effects 0.000 title claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 title claims description 11
- 238000005422 blasting Methods 0.000 claims abstract description 51
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 230000035939 shock Effects 0.000 claims abstract description 7
- 238000000605 extraction Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 101
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000005474 detonation Methods 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract 1
- 206010017076 Fracture Diseases 0.000 description 16
- 208000010392 Bone Fractures Diseases 0.000 description 14
- 239000011435 rock Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 208000013201 Stress fracture Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a method for promoting shaft shale gas exploitation by horizontal branch well blasting and fracturing, which comprises the steps of firstly drilling a shaft and a plurality of horizontal branch wells, and then installing a first blasting hole packer in one of the horizontal branch wells to form a hole sealing section between the first blasting hole packer and the deepest part of the horizontal branch well; when the blasting fracturing is carried out, firstly, blasting gas is injected into the hole sealing section, the detection is carried out in real time through the detection device, the injection of the blasting gas is stopped until the required value of the blasting is reached, finally, the ignition head is controlled to ignite, so that the blasting gas in the hole sealing section is caused to explode, high-temperature and high-pressure gas and detonation shock waves generated by gas explosion are used for carrying out a primary impact fracturing process on surrounding shale through mesh holes on the sieve tube, and retreating blasting fracturing is repeatedly adopted for multiple times to form a fracture network around the horizontal branch well; therefore, the method can generate a complex fracture network in the reservoir without a water source, and can keep the fracture network in a long-term connectivity state, so that the shale gas extraction is ensured.
Description
Technical Field
The invention relates to a method for promoting vertical shaft shale gas exploitation by combustion explosion and fracturing of a horizontal branch well, and belongs to the technical field of shale gas exploitation.
Background
Shale gas is currently considered to be the most promising energy source for coal replacement. However, because the shale reservoir is deeply buried and has low permeability, an artificial method is needed to promote the development of reservoir fractures and improve the yield of shale gas. Horizontal well staged hydraulic fracturing is the most prominent method at present, but the yield of the shale gas well after reservoir fracturing can be reduced by half. The main reasons are that the hydraulic fracturing is long in time, so that the hydraulic fracturing is influenced by a stress environment in the fracturing process, the complex fracture network is difficult to form due to single fracture expansion, and a propping agent is difficult to enter the microfractures, so that the fracturing fractures are closed again under the action of the ground stress. In addition, in water-deficient areas, shale reservoirs with high clay mineral content are not suitable for the hydraulic fracturing method, and the economic cost is greatly increased by long-distance horizontal well construction. Therefore, how to generate a complex fracture network in a reservoir without a water source and simultaneously keep the fracture network connected for a long time is a research direction of the industry.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the method for promoting the exploitation of the shale gas in the vertical shaft by the blasting and fracturing of the horizontal branch well, which can generate a complex fracture network in a reservoir without a water source and simultaneously keep the fracture network in a longer-time connectivity, thereby ensuring the extraction of the shale gas and saving water resources.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for promoting vertical shaft shale gas exploitation by horizontal branch well blasting and fracturing comprises the following specific steps:
A. drilling a vertical shaft from the ground to the nearest shale reservoir to be mined until the vertical shaft reaches the deepest part of the shale reservoir, and installing a casing pipe into the vertical shaft in the process of drilling the vertical shaft to complete the setting work of the vertical shaft;
B. a directional drilling machine is adopted to extend into the vertical shaft and reach the position of a shale reservoir, a plurality of horizontal branch wells are drilled from the vertical shaft to the range of the shale reservoir, and a sleeve pipe and a sieve pipe combination is adopted in each horizontal branch well for supporting, wherein one end of the sleeve pipe is connected with the vertical shaft, and the other end of the sleeve pipe is connected with one end of the sieve pipe; the sieve tube is provided with a plurality of meshes;
C. firstly, installing a first blasting hole packer in one horizontal branch well, wherein the blasting hole packer is fixed in a sieve tube of the horizontal branch well, so that a hole sealing section is formed between the blasting hole packer and the deepest part of the horizontal branch well; the device comprises a hole sealing section, a hole burning and sealing device and a hole sealing device, wherein the hole burning and sealing device is provided with a detection device, an ignition head and an air inlet pipe; the other end of the air inlet pipe is provided with a connector, the air inlet pipe is connected with a high-pressure air injection pipe through the connector, the other end of the high-pressure air injection pipe extends out of the vertical shaft to be connected with an air outlet of an air booster pump on the ground, and an air inlet of the air booster pump is connected with an air outlet of the air storage chamber; the detection device and the ignition head are both fixed on the blasting hole packer and positioned in the hole sealing section, the detection device and the ignition head are both connected with a control center on the ground through communication lines, the detection device comprises a temperature sensor, an air pressure sensor and a gas concentration sensor, and the assembly of the blasting fracturing system is completed;
D. opening a valve of the gas storage chamber and starting a gas booster pump, continuously passing the explosion gas from the gas storage chamber through the gas booster pump, the high-pressure gas injection pipe and the gas inlet pipe in sequence, enabling the one-way gas valve to be pressed and opened, and then entering the hole sealing section, wherein the control center collects the temperature, the gas pressure and the gas concentration in the hole sealing section in real time through a detection device, when the collected real-time temperature, the real-time gas pressure and the real-time gas concentration reach the required explosion value, the gas booster pump is stopped and the valve of the gas storage chamber is closed, the one-way gas valve is automatically closed at the moment, and then the high-pressure gas injection pipe is separated from the connector; after the completion, the control center controls the ignition head to ignite, so that blasting gas in the hole sealing section is initiated to explode, high-temperature and high-pressure gas and detonation shock waves generated by gas explosion perform a primary impact fracturing process on surrounding shale through mesh holes on the sieve tube, after the explosion is finished, the step C is repeated, a blasting hole packer is arranged at a position which is a distance away from the first blasting hole packer, and a hole sealing section is formed between the two blasting hole packers again; then repeating the step D to finish the primary impact fracturing process of the hole sealing section; repeating the above steps for multiple times until the blasting hole packer reaches the joint of the sleeve and the sieve tube, and forming a fracture network around the horizontal branch well by adopting retreating blasting fracturing;
E. c, repeating the steps C and D, sequentially enabling fracture networks to be formed around each horizontal branch well in the shale reservoir to be mined, and performing shale gas extraction on the shale reservoir through a vertical well after completion;
F. and when the shale gas in the shale reservoir to be exploited is exhausted recently, if the shale reservoir to be exploited exists below, repeating the steps A to E to extract the shale gas from the shale reservoir to be exploited below.
Further, the horizontal branch wells are distributed in a staggered mode, and the length of each horizontal branch well is 50 m; and a sleeve is adopted in the range of 10m away from the vertical shaft in each horizontal branch well, and the rest parts adopt a sieve tube.
Further, the blasting gas is a mixed gas of methane and oxygen.
Further, the control center is a computer.
Compared with the prior art, the method has the advantages that the vertical shaft is firstly arranged from the ground to the shale reservoir, then a plurality of horizontal branch shafts are arranged from the vertical shaft to the shale reservoir, and the horizontal branch shafts are supported by adopting the combination of the casing and the sieve tube; then installing a first blasting hole packer in one horizontal branch well to form a hole sealing section between the first blasting hole packer and the deepest part of the horizontal branch well; and other parts are connected in sequence to complete the assembly of the combustion and explosion fracturing system; when the blasting fracturing is carried out, firstly, blasting gas is injected into the hole sealing section, the detection is carried out in real time through the detection device, the injection of the blasting gas is stopped until the required value of the blasting is reached, finally, the ignition head is controlled to ignite, so that the blasting gas in the hole sealing section is caused to explode, high-temperature and high-pressure gas and detonation shock waves generated by gas explosion are used for carrying out a primary impact fracturing process on surrounding shale through mesh holes on the sieve tube, and retreating blasting fracturing is repeatedly adopted for multiple times to form a fracture network around the horizontal branch well; because the blasting process instantly generates high-temperature high-pressure gas and detonation shock waves, the high-temperature high-pressure gas and detonation shock waves have extremely high loading rate, so that an explosion crack is not easily influenced by the ground stress environment, meanwhile, the impact force generated instantly by blasting is extremely high, and after the explosion crack impacts and damages surrounding rock masses, the surrounding rock masses can generate dislocation under the action of shearing force to form a self-supporting structure, so that the generated crack network is prevented from being reclosed under the action of the ground stress; therefore, the method can generate a complex fracture network in the reservoir without a water source, and can keep the fracture network in a longer-time connectivity state, so that the extraction of the shale gas is ensured, and the water resource is saved.
Drawings
FIG. 1 is an overall layout diagram of embodiment 1 of the present invention;
fig. 2 is a structural schematic diagram of the blasting hole packer in the invention.
In the figure: 1-1, a first-page rock reservoir, 1-2, a second shale reservoir, 2, a vertical shaft, 3, a horizontal branch well, 4, a casing, 5, a sieve pipe, 6, a mesh, 7, a blasting hole packer, 8, a detection device, 9, an ignition head, 10, a fracture network, 11, a high-pressure gas injection pipe, 12, a gas booster pump, 13, a gas storage chamber, 14, a control center, 15, a communication line, 16, a one-way gas valve, 17, a connector, 18 and a gas inlet pipe.
Detailed Description
The present invention will be further explained below.
Example 1: through geological exploration, two shale reservoirs with mining value exist in the stratum of a certain area, namely a first shale reservoir 1-1 and a second shale reservoir 1-2, the first shale reservoir 1-1 is positioned above the second shale reservoir 1-2, as shown in figure 1, the shale gas mining method is adopted for shale gas mining, and the specific steps are as follows:
A. drilling a vertical shaft 2 from the ground to a first shale reservoir 1-1 until the vertical shaft 2 reaches the deepest part of the shale reservoir, and installing a casing 4 into the vertical shaft 2 in the process of drilling the vertical shaft 2 to complete the setting work of the vertical shaft 2;
B. a directional drilling machine is adopted to extend into a vertical shaft 2 and reach the position of a first-page rock reservoir 1-1, a plurality of horizontal branch shafts 3 are arranged in the range from the vertical shaft 2 to the first-page rock reservoir 1-1, and a sleeve 4 and a sieve tube 5 are combined in each horizontal branch shaft 3 for supporting, wherein one end of the sleeve 4 is connected with the vertical shaft, and the other end of the sleeve is connected with one end of the sieve tube 5; the sieve tube 5 is provided with a plurality of meshes 6; the horizontal branch wells 3 are distributed in a staggered mode, and the length of each horizontal branch well 3 is 50 m; a casing 4 is adopted in the range which is 10m away from the vertical shaft 2 in each horizontal branch well 3, and the rest parts adopt a sieve tube 5;
C. firstly, installing a first combustion and explosion hole packer 7 in one horizontal branch well 3, and fixing the combustion and explosion hole packer 7 in a sieve tube 5 of the horizontal branch well 3 to form a hole sealing section between the combustion and explosion hole packer 7 and the deepest part of the horizontal branch well 3; as shown in fig. 2, the explosion hole packer 7 is provided with a detection device 8, an ignition head 9 and an air inlet pipe 18, the air inlet pipe 18 penetrates through the explosion hole packer 7, wherein one end of the air inlet pipe 18 at a hole sealing section is provided with a one-way air valve 16, and an air inlet of the one-way air valve 16 is connected with one end of the air inlet pipe 18; the other end of the air inlet pipe 18 is provided with a connector 17, the air inlet pipe 18 is connected with a high-pressure air injection pipe 11 through the connector 17, the other end of the high-pressure air injection pipe 11 extends out of the vertical shaft 2 to be connected with an air outlet of an air booster pump 12 on the ground, and an air inlet of the air booster pump 12 is connected with an air outlet of an air storage chamber 13; the detection device 8 and the ignition head 9 are both fixed on the blasting hole packer 7 and are positioned in a hole sealing section, the detection device 8 and the ignition head 9 are both connected with a control center 14 on the ground through a communication line 15, the detection device 8 comprises a temperature sensor, an air pressure sensor and a gas concentration sensor, and the assembly of the blasting fracturing system is completed;
D. opening a valve of a gas storage chamber 13 and starting a gas booster pump 12, continuously passing a combustion gas from the gas storage chamber 13 through the gas booster pump 12, a high-pressure gas injection pipe 11 and a gas inlet pipe 18 in sequence, and enabling a one-way gas valve 16 to be pressed and opened and then enter a hole sealing section, wherein the combustion gas is a mixed gas of methane and oxygen, a control center 14 collects the temperature, the gas pressure and the gas concentration in the hole sealing section in real time through a detection device 8 at the moment, when the collected real-time temperature, the collected real-time gas pressure and the collected real-time gas concentration reach values required by explosion, the gas booster pump 12 is stopped and the valve of the gas storage chamber 13 is closed, the one-way gas valve 16 is automatically closed at the moment, and then the high-pressure gas injection pipe 11 is separated from a connector 17; after the completion, the control center 14 controls the ignition head 9 to ignite, so that the blasting gas in the hole sealing section is initiated to explode, the high-temperature and high-pressure gas and the detonation shock wave generated by the gas explosion perform one-time impact fracturing process on the surrounding shale through the meshes 6 on the sieve tube 5, after the explosion is finished, the step C is repeated, a blasting hole packer 7 is arranged at the position 5m away from the first blasting hole packer, and a hole sealing section of 5m is formed between the two blasting hole packers 7; then repeating the step D to finish the primary impact fracturing process of the hole sealing section; repeating the steps for a plurality of times until the combustion explosion hole packer 7 reaches the joint of the casing 4 and the sieve tube 5, and forming a fracture network around the horizontal branch well 3 by adopting retreating combustion explosion fracturing;
E. c and D are repeated, a fracture network is formed around each horizontal branch well 3 in the first-page rock reservoir 1-1 in sequence, and after completion, shale gas extraction work is carried out on the first-page rock reservoir 1-1 through the vertical well 2;
F. and when the shale gas in the first shale reservoir 1-1 is completely extracted, repeating the steps A to E to extract the shale gas in the second shale reservoir 1-2 below.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (4)
1. A method for promoting vertical shaft shale gas exploitation by horizontal branch well blasting and fracturing is characterized by comprising the following specific steps:
A. drilling a vertical shaft from the ground to the nearest shale reservoir to be mined until the vertical shaft reaches the deepest part of the shale reservoir, and installing a casing pipe into the vertical shaft in the process of drilling the vertical shaft to complete the setting work of the vertical shaft;
B. a directional drilling machine is adopted to extend into the vertical shaft and reach the position of a shale reservoir, a plurality of horizontal branch wells are drilled from the vertical shaft to the range of the shale reservoir, and a sleeve pipe and a sieve pipe combination is adopted in each horizontal branch well for supporting, wherein one end of the sleeve pipe is connected with the vertical shaft, and the other end of the sleeve pipe is connected with one end of the sieve pipe; the sieve tube is provided with a plurality of meshes;
C. firstly, installing a first blasting hole packer in one horizontal branch well, wherein the blasting hole packer is fixed in a sieve tube of the horizontal branch well, so that a hole sealing section is formed between the blasting hole packer and the deepest part of the horizontal branch well; the device comprises a hole sealing section, a hole burning and sealing device and a hole sealing device, wherein the hole burning and sealing device is provided with a detection device, an ignition head and an air inlet pipe; the other end of the air inlet pipe is provided with a connector, the air inlet pipe is connected with a high-pressure air injection pipe through the connector, the other end of the high-pressure air injection pipe extends out of the vertical shaft to be connected with an air outlet of an air booster pump on the ground, and an air inlet of the air booster pump is connected with an air outlet of the air storage chamber; the detection device and the ignition head are both fixed on the blasting hole packer and positioned in the hole sealing section, the detection device and the ignition head are both connected with a control center on the ground through communication lines, the detection device comprises a temperature sensor, an air pressure sensor and a gas concentration sensor, and the assembly of the blasting fracturing system is completed;
D. opening a valve of the gas storage chamber and starting a gas booster pump, continuously passing the explosion gas from the gas storage chamber through the gas booster pump, the high-pressure gas injection pipe and the gas inlet pipe in sequence, enabling the one-way gas valve to be pressed and opened, and then entering the hole sealing section, wherein the control center collects the temperature, the gas pressure and the gas concentration in the hole sealing section in real time through a detection device, when the collected real-time temperature, the real-time gas pressure and the real-time gas concentration reach the required explosion value, the gas booster pump is stopped and the valve of the gas storage chamber is closed, the one-way gas valve is automatically closed at the moment, and then the high-pressure gas injection pipe is separated from the connector; after the completion, the control center controls the ignition head to ignite, so that the explosion gas in the hole sealing section is initiated to explode, the high-temperature and high-pressure gas and the explosion shock wave generated by gas explosion perform one-time impact fracturing process on the surrounding shale through the mesh holes on the sieve tube, after the explosion is finished, the step C is repeated, a further explosion hole sealing device is arranged at a position which is a distance away from the first explosion hole sealing device, and a hole sealing section is formed between the two explosion hole sealing devices again; then repeating the step D to finish the primary impact fracturing process of the hole sealing section; repeating the steps for a plurality of times until the combustion explosion hole packer reaches the joint of the sleeve and the sieve tube, and forming a fracture network around the horizontal branch well by adopting retreating combustion explosion fracturing;
E. repeating the step C and the step D, sequentially enabling fracture networks to be formed around each horizontal branch well in the shale reservoir to be mined, and performing shale gas extraction on the shale reservoir through the vertical well after completion;
F. and when the shale gas in the shale reservoir to be exploited is exhausted recently, if the shale reservoir to be exploited exists below, repeating the steps A to E to extract the shale gas from the shale reservoir to be exploited below.
2. The method for promoting vertical shaft shale gas exploitation by horizontal multilateral well blasting and fracturing according to claim 1, wherein the horizontal multilateral wells are distributed in a staggered mode, and the length of each horizontal multilateral well is 50 m; and a sleeve is adopted in the range with the distance of 10m from the vertical shaft in each horizontal branch well, and a screen pipe is adopted in the rest part.
3. The method for promoting vertical shaft shale gas exploitation by horizontal multilateral well blasting and fracturing according to claim 1, wherein the blasting gas is a mixed gas of methane and oxygen.
4. The method for promoting vertical shaft shale gas exploitation by horizontal multilateral well blasting fracturing according to claim 1, wherein the control center is a computer.
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| CN103899289A (en) * | 2012-12-25 | 2014-07-02 | 王及元 | Deep shale gas drilling and exploiting method and fracturing device adopted in same |
| CN104005748A (en) * | 2014-05-21 | 2014-08-27 | 华南理工大学 | Static blasting fracturing method used for exploitation of shale gas and other low permeability oil and gas reservoirs |
| CN110017125A (en) * | 2019-04-29 | 2019-07-16 | 苏州大学 | A kind of recovery method and system of shale gas |
| CN112761588A (en) * | 2021-01-22 | 2021-05-07 | 中国矿业大学 | Shale reservoir methane in-situ combustion-explosion fracturing and combustion improver safe feeding cooperative control method |
| CN112878973A (en) * | 2021-01-22 | 2021-06-01 | 中国矿业大学 | Shale reservoir methane in-situ multistage pulse energy-gathering blasting fracturing method |
| CN112878974A (en) * | 2021-01-22 | 2021-06-01 | 中国矿业大学 | Unconventional horizontal staged methane multistage pulse blasting fracturing enhanced extraction method for natural gas well |
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- 2021-07-05 CN CN202110755442.7A patent/CN113338888B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899289A (en) * | 2012-12-25 | 2014-07-02 | 王及元 | Deep shale gas drilling and exploiting method and fracturing device adopted in same |
| CN104005748A (en) * | 2014-05-21 | 2014-08-27 | 华南理工大学 | Static blasting fracturing method used for exploitation of shale gas and other low permeability oil and gas reservoirs |
| CN110017125A (en) * | 2019-04-29 | 2019-07-16 | 苏州大学 | A kind of recovery method and system of shale gas |
| CN112761588A (en) * | 2021-01-22 | 2021-05-07 | 中国矿业大学 | Shale reservoir methane in-situ combustion-explosion fracturing and combustion improver safe feeding cooperative control method |
| CN112878973A (en) * | 2021-01-22 | 2021-06-01 | 中国矿业大学 | Shale reservoir methane in-situ multistage pulse energy-gathering blasting fracturing method |
| CN112878974A (en) * | 2021-01-22 | 2021-06-01 | 中国矿业大学 | Unconventional horizontal staged methane multistage pulse blasting fracturing enhanced extraction method for natural gas well |
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