CN105673067A - Hydraulic fracture and microwave radiation combined coal bed gas enhanced extraction device and method - Google Patents

Hydraulic fracture and microwave radiation combined coal bed gas enhanced extraction device and method Download PDF

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Publication number
CN105673067A
CN105673067A CN201610128730.9A CN201610128730A CN105673067A CN 105673067 A CN105673067 A CN 105673067A CN 201610128730 A CN201610128730 A CN 201610128730A CN 105673067 A CN105673067 A CN 105673067A
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microwave radiation
mouth
microwave
fracturing
gas
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CN105673067B (en
Inventor
胡国忠
朱怡然
何文瑞
许家林
秦伟
孙邈
蓝昌金
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F7/00Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
    • 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
    • E21B43/006Production of coal-bed methane
    • 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
    • E21B43/16Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
    • E21B43/2405Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection in association with fracturing or crevice forming processes

Abstract

The invention discloses a hydraulic fracture and microwave radiation combined coal bed gas enhanced extraction device and method, and belongs to surface borehole coal bed gas extraction devices and methods. A sleeve is arranged in a borehole fixing section, the lower end of the sleeve is provided with a high-strength nonmetallic screen pipe, and the upper portion of the sleeve is provided with a hydraulic facture opening, a gas extraction opening and a microwave radiation monitoring opening; a water pump is connected with the hydraulic fracture opening through a water tank and a pipeline, and a hydraulic fracture opening valve is arranged on the hydraulic fracture opening; a gas extraction opening valve is arranged on the gas extraction opening; a signal transmission line, a waveguide pipe and a microwave radiation monitoring opening valve are arranged on the microwave radiation monitoring opening, one end of the signal transmission line is connected with a monitoring device, and the other end of the signal transmission line is connected with a sensor; one end of the waveguide pipe is connected with a microwave radiator through a waveguide pipe valve, and the other end of the waveguide pipe is connected with a microwave radiation antenna and a microwave radiation window. Through the combined effect of hydraulic fracture and microwave radiation, coal bed permeation is achieved, the desorption efficiency of coal bed gas is improved, and high-efficiency extraction of coal bed gas is promoted.

Description

A kind of device and method of fracturing and the combined reinforced draining coal seam gas of microwave radiation
Technical field
The present invention relates to a kind of ground well drainage coal-bed gas device and method, particularly relate to the device and method of a kind of fracturing and the combined reinforced draining coal seam gas of microwave radiation.
Background technology
For do not possess exploitation protective layer condition projecting coal bed time, taking out coal-bed gas in advance is maximally effective coal and gas prominent regional control measure. Seam gas content and gas pressure can be reduced, thus reducing or eliminating projecting coal bed coal and gas prominent danger, mine gas emission rate during exploitation reducig by taking out coal-bed gas in advance. But, increase along with the seam mining degree of depth, crustal stress is continuously increased, Permeability Coefficent in Coal Seam is more and more lower, in coal bed gas extraction process, gas is difficult to desorbing, making coal bed gas extraction rate relatively low, thus constraining the region protrusion-dispelling effect taking out these technical measures of coal-bed gas in advance, and have impact on the normal excavation replacement of mine. Therefore, want to improve coal bed gas extraction effect, improve coal bed gas extraction rate, be necessary for increasing the breathability in coal seam, the desorbing accelerating coal-bed gas and seepage flow. At present, in order to realize this purpose, rely primarily on the anti-reflection technology in various forms of coal seam; In Practical Project is put into practice, it is all often adopt the single anti-reflection technology in coal seam, although coal-bed gas effect so can be improved to a certain extent, but various measures all have the limitation of self, it is difficult to take into account so that improve coal bed gas extraction rate relatively limited in the desorbing two of the breathability and acceleration coal-bed gas that increase coal seam simultaneously.
Summary of the invention
The present invention be directed to technique scheme Problems existing, it is proposed to the device and method of a kind of fracturing and the combined reinforced draining coal seam gas of microwave radiation, solve that gas permeability of coal seam is low and coal-bed gas is difficult to the problem that the gas pumping rate caused by desorbing is low.
The object of the present invention is achieved like this: the device and method of a kind of fracturing and the combined reinforced draining coal seam gas of microwave radiation;
Device includes: water pump, water tank, fracturing mouth valve, microwave radiation monitoring mouth, microwave radiometer, microwave radiation monitoring mouth valve, gas pumping mouth valve, gas pumping mouth, monitoring device, well cementation section, signal transmssion line, sleeve pipe, waveguide, ground drilling, sensor, antenna for radiating microwave, microwave radiation window, high-strength non-metallic screen casing, fracturing mouth, waveguide valve, gas pumping pump and gas pumping pipe; The upper end of ground drilling is well cementation section, has sleeve pipe, have high-strength non-metallic screen casing in the lower end of sleeve pipe in ground drilling, and fracturing mouth, gas pumping mouth and microwave radiation monitoring mouth are arranged at the top of sleeve pipe; Water pump is connected with fracturing mouth by water tank and pipeline, has fracturing mouth valve on fracturing mouth; Gas pumping mouth has gas pumping mouth valve; Having signal transmssion line, waveguide and microwave radiation monitoring mouth valve on microwave radiation monitoring mouth, one end of signal transmssion line is connected with monitoring device, and the other end is connected with sensor; One end of waveguide is connected with microwave radiometer by waveguide valve, and the other end has antenna for radiating microwave and microwave radiation window.
Method comprises the following steps:
A. drill through coal bed gas extraction ground drilling, penetrate extraction coal seam;
B., ground drilling is transferred sleeve pipe, and in well cementation section well cementation; The coal seam section of drilling well arranges high-strength non-metallic screen casing, supports coal seam, it is prevented that the coal seam section of drilling well is caved in; Screen casing hole can make water under high pressure therefrom jet pressure break coal seam, also flows to the passage of extraction sleeve pipe as gas; Collar piping seam uses four-way interface to connect, respectively sleeve opening, gas pumping mouth, microwave radiation monitoring mouth and fracturing mouth;
C. it is disposed about fracturing system, microwave radiometer and monitoring device at ground drilling;
D. utilize fracturing system that coal seam is carried out pressure break, after treating that coal bed fracturing completes, stop pressure break, the remaining fracturing fluid in emptying drilling well;
E., waveguide connects microwave radiometer and microwave radiation window, and signal transmssion line connects monitoring device and sensor, and the earth lead of sensor is carried out ground connection;
F. open microwave radiation monitoring mouth valve, keep gas pumping mouth valve and fracturing mouth valve closing, the microwave radiation window connected and sensor are monitored mouth by microwave radiation and sends to the appointment position of drilling well;
G. open microwave radiometer and monitoring device, coal seam is applied microwave radiation, heat coal seam; Meanwhile, the coal seam temperature in monitoring drilling well, steam vapour amount and gas density are transmitted back to monitoring device by sensor, and power and load time to microwave radiometer dynamically regulate; In order to be effectively improved coal-bed gas desorption efficiency, make again loading procedure safe and efficient, maintain coal seam temperature at 150 200 DEG C;
H. open gas pumping mouth valve, open gas pumping pump and gas in drilling well is carried out enhanced gas extraction.
Described microwave radiation is intermittent type microwave radiation: in loading procedure when sensor sensing temperature is increased to 200 DEG C, closes microwave radiometer, stops microwave and loads; When sensor sensing temperature is reduced to 150 DEG C, open microwave radiometer, proceed coal body to load.
Beneficial effect, owing to have employed such scheme, by fracturing coal seam, extension cracks in coal seam and hole, the breathability increasing coal seam, accelerates the seepage flow of coal-bed gas; Meanwhile, the coal seam saturated with water after fracturing, and water and coal are all stronger microwave absorptions, microwave radiation effectively can be converted to heat energy brings in coal seam, improves the temperature in coal seam, reduces coal seam water saturation, promotes coal-bed gas desorbing and diffusion. Fracturing and the synergy of microwave radiation, both achieved coal seam anti-reflection, also improved the desorption efficiency of coal-bed gas, be effectively improved coal bed gas extraction rate.
Advantage:
1, the present invention adopts four-way interface, it is possible to equipment of effectively saving is installed and the time of dismounting, improves work efficiency.
2, construction difficulty is low, and operation is simple, it is easy to accomplish.
3, fracturing is effectively combined by this invention with microwave irradiation technology, utilizes the water entering coal seam in hydraulic fracturing process, the microwave in efficient absorption microwave radiation process, it is the heat energy of water by microwave energy, bring coal seam depth into, heat coal seam, improve desorption of mash gas degree. Fracturing and the synergy of microwave irradiation technology, both increased the breathability in coal seam, improve again the desorption efficiency of coal-bed gas, such that it is able to the extraction efficiency of coal-bed gas is significantly increased.
Accompanying drawing explanation
Fig. 1 is the ground drilling fracturing structure chart with the combined reinforced draining coal seam gas device of microwave radiation of the present invention.
In figure, 1, water pump; 2, water tank; 3, fracturing mouth valve; 4, microwave radiation monitoring mouth; 5, microwave radiometer; 6, microwave radiation monitoring mouth valve; 7, gas pumping mouth valve; 8, gas pumping mouth; 9, monitoring device; 10, well cementation section; 11, signal transmssion line; 12, sleeve pipe; 13, waveguide; 14, ground drilling; 15, sensor; 16, antenna for radiating microwave; 17, microwave radiation window; 18, high-strength non-metallic screen casing; 19, fracturing mouth; 20, waveguide valve; 21, gas pumping pump; 22, gas pumping pipe.
Specific implementation method
The special purpose device of the present invention includes: device includes: water pump 1, water tank 2, fracturing mouth valve 3, microwave radiation monitoring mouth 4, microwave radiometer 5, microwave radiation monitoring mouth valve 6, gas pumping mouth valve 7, gas pumping mouth 8, monitoring device 9, well cementation section 10, signal transmssion line 11, sleeve pipe 12, waveguide 13, ground drilling 14, sensor 15, antenna for radiating microwave 16, microwave radiation window 17, high-strength non-metallic screen casing 18, fracturing mouth 19, waveguide valve 20, gas pumping pump 21 and gas pumping pipe 22, the upper end of ground drilling 14 is well cementation section 10, has sleeve pipe 12 in ground drilling 14, has high-strength non-metallic screen casing 18, the top of sleeve pipe 12 to have fracturing mouth 19, gas pumping mouth 8 and microwave radiation monitoring mouth 4 in the lower end of sleeve pipe 12, water pump 1 is connected with fracturing mouth 19 by water tank 2 and pipeline, has fracturing mouth valve 3 on fracturing mouth 19, gas pumping mouth 8 has gas pumping mouth valve 7, having signal transmssion line 11, waveguide 13 and microwave radiation monitoring mouth valve 6 on microwave radiation monitoring mouth 4, one end of signal transmssion line 11 is connected with monitoring device 9, and the other end is connected with sensor 15, one end of waveguide 13 is connected with microwave radiometer 5 by waveguide valve 20, and the other end has antenna for radiating microwave 16 and microwave radiation window 17.
Method comprises the following steps:
A. drill through coal bed gas extraction ground drilling 14, penetrate extraction coal seam;
B., ground drilling is transferred sleeve pipe 12, and in well cementation section well cementation; The coal seam section of drilling well arranges high-strength non-metallic screen casing 18, supports coal seam, it is prevented that the coal seam section of drilling well is caved in; Screen casing hole can make water under high pressure therefrom jet pressure break coal seam, also flows to the passage of extraction sleeve pipe as gas; Collar piping seam uses four-way interface to connect, respectively sleeve opening, gas pumping mouth 8, Microwave emission monitoring mouth 4 and fracturing mouth 19;
C. it is disposed about fracturing system, microwave radiometer and monitoring device at ground drilling 14;
D. utilize fracturing system that coal seam is carried out pressure break, after treating that coal bed fracturing completes, stop pressure break, the remaining fracturing fluid in emptying drilling well;
E., waveguide 13 connects microwave radiometer 5 and microwave radiation window 17, and signal transmssion line 11 connects monitoring device 9 and sensor 15, and the earth lead of sensor is carried out ground connection;
F. open microwave radiation monitoring mouth valve 6, keep gas pumping mouth valve 7 and fracturing mouth valve 3 to close, the microwave radiation window 17 connected and sensor 15 are sent to the appointment position of drilling well by microwave radiation monitoring mouth 4;
G. open microwave radiometer and monitoring device, coal seam is applied microwave radiation, heat coal seam; Meanwhile, the coal seam temperature in monitoring drilling well, steam vapour amount and gas density are transmitted back to monitoring device by sensor, and power and load time to microwave radiometer are adjusted; In order to be effectively improved coal-bed gas desorption efficiency, make again loading procedure safe and efficient, generally maintain coal seam temperature at 150 200 DEG C;
H. open gas pumping mouth valve 7, open gas pumping pump 21 and gas in drilling well is carried out enhanced gas extraction.
Described microwave radiation is intermittent type microwave radiation: in loading procedure when sensor sensing temperature is increased to 200 DEG C, closes microwave radiometer, stops microwave and loads; When sensor sensing temperature is reduced to 150 DEG C, open microwave radiometer, proceed coal body to load.

Claims (3)

1. fracturing and a device and method for the combined reinforced draining coal seam gas of microwave radiation, is characterized in that: device includes: water pump, water tank, fracturing mouth valve, microwave radiation monitoring mouth, microwave radiometer, microwave radiation monitoring mouth valve, gas pumping mouth valve, gas pumping mouth, monitoring device, well cementation section, signal transmssion line, sleeve pipe, waveguide, ground drilling, sensor, antenna for radiating microwave, microwave radiation window, high-strength non-metallic screen casing, fracturing mouth, waveguide valve, gas pumping pump and gas pumping pipe; The upper end of ground drilling is well cementation section, has sleeve pipe, have high-strength non-metallic screen casing in the lower end of sleeve pipe in ground drilling, and fracturing mouth, gas pumping mouth and microwave radiation monitoring mouth are arranged at the top of sleeve pipe; Water pump is connected with fracturing mouth by water tank and pipeline, has fracturing mouth valve on fracturing mouth; Gas pumping mouth has gas pumping mouth valve; Having signal transmssion line, waveguide and microwave radiation monitoring mouth valve on microwave radiation monitoring mouth, one end of signal transmssion line is connected with monitoring device, and the other end is connected with sensor; One end of waveguide is connected with microwave radiometer by waveguide valve, and the other end has antenna for radiating microwave and microwave radiation window.
2. the fracturing described in claim 1 and the combined reinforced draining coal seam gas method of microwave radiation, it is characterised in that: method comprises the following steps:
A. drill through coal bed gas extraction ground drilling, penetrate extraction coal seam;
B., ground drilling is transferred sleeve pipe, and in well cementation section well cementation; The coal seam section of drilling well arranges high-strength non-metallic screen casing, supports coal seam, it is prevented that the coal seam section of drilling well is caved in; Screen casing hole can make water under high pressure therefrom jet pressure break coal seam, also flows to the passage of extraction sleeve pipe as gas; Collar piping seam uses four-way interface to connect, respectively sleeve opening, gas pumping mouth, microwave radiation monitoring mouth and fracturing mouth;
C. it is disposed about fracturing system, microwave radiometer and monitoring device at ground drilling;
D. utilize fracturing system that coal seam is carried out pressure break, after treating that coal bed fracturing completes, stop pressure break, the remaining fracturing fluid in emptying drilling well;
E., waveguide connects microwave radiometer and microwave radiation window, and signal transmssion line connects monitoring device and sensor, and the earth lead of sensor is carried out ground connection;
F. open Microwave emission monitoring mouth valve, keep gas pumping mouth valve and fracturing mouth valve closing, the microwave radiation window connected and sensor are monitored mouth by microwave radiation and sends to the appointment position of drilling well;
G. open microwave radiometer and monitoring device, coal seam is applied microwave radiation, heat coal seam; Meanwhile, the coal seam temperature in monitoring drilling well, steam vapour amount and gas density are transmitted back to monitoring device by sensor, and power and load time to microwave radiometer dynamically regulate; In order to be effectively improved coal-bed gas desorption efficiency, make again loading procedure safe and efficient, maintain coal seam temperature at 150 200 DEG C;
H. open gas pumping mouth valve, open gas pumping pump and gas in drilling well is carried out enhanced gas extraction.
3. the method for a kind of fracturing according to claim 2 and the combined reinforced draining coal seam gas of microwave radiation, it is characterized in that: described microwave radiation is intermittent type microwave radiation: in loading procedure when sensor sensing temperature is increased to 200 DEG C, close microwave radiometer, stop microwave and load; When sensor sensing temperature is reduced to 150 DEG C, open microwave radiometer, proceed coal body to load.
CN201610128730.9A 2016-03-07 2016-03-07 A kind of hydraulic fracturing and the device and method of the combined reinforced draining coal seam gas of microwave radiation Active CN105673067B (en)

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CN106523025A (en) * 2017-01-10 2017-03-22 河南理工大学 Microwave system facilitating coal mass gas desorption
CN106812512A (en) * 2017-03-02 2017-06-09 新疆大学 Low-permeability water-bearing coal seam reservoirs microwave steam explosion is anti-reflection drop absorbing method
CN107476786A (en) * 2017-10-17 2017-12-15 辽宁工程技术大学 A kind of ultrasonic wave and the coal bed gas pumping method of Far-infrared Heating synergy
CN107701163A (en) * 2017-10-11 2018-02-16 山东科技大学 The blast of a kind of thermal agitation and drilling gas cooperates the secondary permeability improvement device in coal seam and method
CN108868722A (en) * 2018-08-02 2018-11-23 西南石油大学 A kind of method of the coal bed gas microwave exploitation of combination hydraulic fracturing
CN109083624A (en) * 2018-07-04 2018-12-25 华中科技大学 A kind of the reservoir properties remodeling method and device of composite pulse shock wave and hydraulic fracturing
CN109115659A (en) * 2018-08-02 2019-01-01 西南石油大学 A kind of experimental method for verifying coal bed gas microwave mining feasibility
CN109854210A (en) * 2019-03-05 2019-06-07 重庆大学 Using the gas pumping method and extraction system of liquid nitrogen and steam fracturing coal seam
CN110953013A (en) * 2019-12-05 2020-04-03 中煤科工集团西安研究院有限公司 Controllable jet flow punching pressure relief and permeability increase device and method for soft coal seam
WO2020243919A1 (en) * 2019-06-05 2020-12-10 中国矿业大学(北京) Mining machine and mining method applicable to fluidized minging of ore bodies
CN112392540A (en) * 2020-11-19 2021-02-23 中国矿业大学 Microwave-assisted pre-splitting and high-voltage pulse synergistic coal seam weakening and permeability increasing device and method
CN112780243A (en) * 2020-12-31 2021-05-11 中国矿业大学 Integrated reinforced coal seam gas extraction system and extraction method

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CN105114038A (en) * 2015-08-04 2015-12-02 太原理工大学 System and method for increasing drainage quantity of coal bed gas of ground well drainage goaf
CN105298462A (en) * 2015-11-06 2016-02-03 中国矿业大学 High-power electric knocking assisted hydrofracture coal seam permeability increase method for end-located drainage roadway
CN105298459A (en) * 2015-11-24 2016-02-03 中国矿业大学 Method for relieving water blocking damage of ground coal-bed methane extracting and drilling coal seam by microwave heating

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CN104790915A (en) * 2015-04-22 2015-07-22 西南石油大学 Coal bed methane recovery method
CN105114116A (en) * 2015-07-30 2015-12-02 山东科技大学 Method for strengthening regional gas extraction through hydro-thermal coupling fracturing
CN105114038A (en) * 2015-08-04 2015-12-02 太原理工大学 System and method for increasing drainage quantity of coal bed gas of ground well drainage goaf
CN105298462A (en) * 2015-11-06 2016-02-03 中国矿业大学 High-power electric knocking assisted hydrofracture coal seam permeability increase method for end-located drainage roadway
CN105298459A (en) * 2015-11-24 2016-02-03 中国矿业大学 Method for relieving water blocking damage of ground coal-bed methane extracting and drilling coal seam by microwave heating

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CN106523025A (en) * 2017-01-10 2017-03-22 河南理工大学 Microwave system facilitating coal mass gas desorption
CN106523025B (en) * 2017-01-10 2018-10-12 河南理工大学 Promote the microwave system of coal gas desorption
CN106812512A (en) * 2017-03-02 2017-06-09 新疆大学 Low-permeability water-bearing coal seam reservoirs microwave steam explosion is anti-reflection drop absorbing method
WO2019072183A1 (en) * 2017-10-11 2019-04-18 山东科技大学 Coal seam secondary anti-reflection device and method by means of joint efforts of thermal disturbance and drilling gas explosion
CN107701163A (en) * 2017-10-11 2018-02-16 山东科技大学 The blast of a kind of thermal agitation and drilling gas cooperates the secondary permeability improvement device in coal seam and method
CN107476786A (en) * 2017-10-17 2017-12-15 辽宁工程技术大学 A kind of ultrasonic wave and the coal bed gas pumping method of Far-infrared Heating synergy
WO2020006973A1 (en) * 2018-07-04 2020-01-09 华中科技大学 Pulsed laser wave and hydraulic fracturing compounded reforming method and apparatus for physical attribute of reservoir
CN109083624A (en) * 2018-07-04 2018-12-25 华中科技大学 A kind of the reservoir properties remodeling method and device of composite pulse shock wave and hydraulic fracturing
CN108868722A (en) * 2018-08-02 2018-11-23 西南石油大学 A kind of method of the coal bed gas microwave exploitation of combination hydraulic fracturing
CN109115659A (en) * 2018-08-02 2019-01-01 西南石油大学 A kind of experimental method for verifying coal bed gas microwave mining feasibility
CN109854210A (en) * 2019-03-05 2019-06-07 重庆大学 Using the gas pumping method and extraction system of liquid nitrogen and steam fracturing coal seam
WO2020243919A1 (en) * 2019-06-05 2020-12-10 中国矿业大学(北京) Mining machine and mining method applicable to fluidized minging of ore bodies
CN110953013A (en) * 2019-12-05 2020-04-03 中煤科工集团西安研究院有限公司 Controllable jet flow punching pressure relief and permeability increase device and method for soft coal seam
CN112392540A (en) * 2020-11-19 2021-02-23 中国矿业大学 Microwave-assisted pre-splitting and high-voltage pulse synergistic coal seam weakening and permeability increasing device and method
CN112780243A (en) * 2020-12-31 2021-05-11 中国矿业大学 Integrated reinforced coal seam gas extraction system and extraction method

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