CN113216921A - Shock wave energy optimization method for electric pulse pretreatment before fracturing of tight reservoir - Google Patents

Shock wave energy optimization method for electric pulse pretreatment before fracturing of tight reservoir Download PDF

Info

Publication number
CN113216921A
CN113216921A CN202110576766.4A CN202110576766A CN113216921A CN 113216921 A CN113216921 A CN 113216921A CN 202110576766 A CN202110576766 A CN 202110576766A CN 113216921 A CN113216921 A CN 113216921A
Authority
CN
China
Prior art keywords
shock wave
reservoir
parameters
electric pulse
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110576766.4A
Other languages
Chinese (zh)
Other versions
CN113216921B (en
Inventor
卢聪
孟庆阳
朱鑫磊
黄昆
郭建春
李欣阳
孙汝岳
罗海云
邹晓兵
王新新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest Petroleum University
Sichuan Energy Internet Research Institute EIRI Tsinghua University
Original Assignee
Southwest Petroleum University
Sichuan Energy Internet Research Institute EIRI Tsinghua University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southwest Petroleum University, Sichuan Energy Internet Research Institute EIRI Tsinghua University filed Critical Southwest Petroleum University
Priority to CN202110576766.4A priority Critical patent/CN113216921B/en
Publication of CN113216921A publication Critical patent/CN113216921A/en
Application granted granted Critical
Publication of CN113216921B publication Critical patent/CN113216921B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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

Abstract

The invention relates to a shock wave energy optimization method for electric pulse pretreatment before fracturing of a tight reservoir, belonging to the technical field of oil-gas fracturing modification. In order to overcome the problems in the prior art, the invention provides a shock wave energy optimization method for electric pulse pretreatment before fracturing of a tight reservoir, which comprises the steps of S10, determining mechanical parameters and physical parameters of the reservoir according to mechanical experiments of reservoir rock samples; step S20, determining the fracture pressure of the stratum according to the mechanical parameters and physical parameters of the reservoir; step S30, performing indoor discharge test according to the electric pulse device to obtain shock wave related parameters in the liquid; and step S40, determining proper construction discharge voltage required during pre-pressure pretreatment according to the fracture pressure of the stratum and relevant parameters of the shock wave. The electric pulse impact construction parameters obtained by the method can improve the efficiency of crushing the compact reservoir by the pulse impact waves, effectively reduce the on-site construction cost and obviously improve the pretreatment effect before electric pulse impact.

Description

Shock wave energy optimization method for electric pulse pretreatment before fracturing of tight reservoir
Technical Field
The invention relates to a shock wave energy optimization method for electric pulse pretreatment before fracturing of a tight reservoir, belonging to the technical field of oil-gas fracturing modification.
Background
In recent years, unconventional oil resources such as compact oil and gas are effectively developed by the staged fracturing technology of the horizontal well, but compact oil and gas reservoirs in China have the characteristics of large buried depth, high formation pressure, difficulty in forming complex cracks after being pressurized and the like. The production of compact oil gas is controlled by the complexity of artificial cracks and effective reconstruction volume, namely the production is controlled by cracks. How to reduce the fracturing operation pressure, increase the construction displacement and improve the fracture complexity is a difficult problem faced by the fracturing reformation of the compact oil and gas reservoir in China at present.
Since reservoir burial depth, lithology and formation stress are main influence factors of reservoir fracture pressure, the method for reducing the fracture pressure of the target reservoir before formal fracturing construction is also called as pre-fracturing treatment. The current methods for pre-fracturing pretreatment mainly used in fracturing sites include: acidifying, sand blasting and perforating. The acidification pretreatment is to inject a section of acid liquor with a certain concentration into a target reservoir, and the acid liquor is used for acid etching of soluble matters in the blast hole and the stratum near the blast hole, so that the purposes of removing the pollution of the blast hole and expanding a liquid inlet channel are achieved, and the fracture pressure during fracturing construction is reduced. However, the acid liquor and the pungent smell thereof not only have great harm to human bodies, but also have serious pollution to water and soil, so that the risk degree and the environmental cost of fracturing operation are not increased.
The sand blasting perforation technology is characterized in that sand carrying liquid with a low sand ratio is pumped into an oil pipe at a high speed and is ejected out through a nozzle at a high speed to continuously eject a target reservoir section to finally form a deep hole, so that the formation fracture pressure can be effectively reduced, but the reliability of the fracturing operation is low, and the fracture operation often faces the embarrassment of not ejecting. By removing the pre-pressing pretreatment technology, the construction friction resistance can be reduced by optimizing fracturing construction parameters, improving fracturing liquid and the like in the construction design stage, and further the fracture pressure in the fracturing construction is reduced, and the method is not repeated.
Patent CN104832149A discloses a natural gas reservoir permeability increasing method using high-voltage electric pulse to assist hydraulic fracturing, and this patent also provides a new pre-fracturing pretreatment idea: the discharge electrode is lowered to a target reservoir stratum through a winch to perform pulse discharge for a certain number of times, pulse shock waves are used for 'breaking' the reservoir stratum, reservoir stratum cracks are increased, permeability is improved, and then fracture pressure during fracturing construction is reduced. Due to the restrictions of conditions such as lithology, physical properties and rock mechanics of a compact reservoir, the current method cannot effectively judge how much energy is used for a discharge electrode to effectively and economically crush a target reservoir, and actual field construction can be implemented only by experience, so that the reliability of the method in construction is greatly reduced.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a shock wave energy optimization method for electric pulse pretreatment before fracturing of a compact reservoir.
The technical scheme provided by the invention for solving the technical problems is as follows: the shock wave energy optimization method for electric pulse pretreatment before fracturing of the tight reservoir comprises the following steps:
step S10, determining mechanical parameters and physical parameters of a reservoir according to mechanical experiments of reservoir rock samples;
step S20, determining the fracture pressure of the stratum according to the mechanical parameters and physical parameters of the reservoir;
step S30, performing indoor discharge test according to the electric pulse device to obtain shock wave related parameters in the liquid;
and step S40, determining proper construction discharge voltage required during pre-pressure pretreatment according to the fracture pressure of the stratum and relevant parameters of the shock wave.
The further technical scheme is that the mechanical parameters of the reservoir comprise maximum horizontal principal stress sigma1Minimum horizontal principal stress σ2Formation pore pressure Pp。
The further technical scheme is that the physical parameters of the reservoir comprise porosity phi, Poisson ratio v and Boit coefficient delta.
The further technical scheme is that the calculation formula of the fracture pressure of the stratum is as follows:
Figure BDA0003084662000000031
Figure BDA0003084662000000032
φC＝φ+δ(1-φ)
Figure BDA0003084662000000033
in the formula: p1Rupture pressure, MPa; sigma1Maximum horizontal principal stress, MPa; sigma2Is the minimum horizontal main factor, MPa; k is a stress coefficient and is dimensionless; ppIs the formation pore pressure, MPa; s is tensile strength, MPa; phi is aCContact porosity,%; phi is porosity,%; nu is Poisson's ratio and is dimensionless; delta is a Boit coefficient and is dimensionless; p is the maximum tensile force when the test piece is damaged, and is MPa; d is the diameter of the cylindrical test piece, m; l is the length of the cylindrical test piece, m.
The further technical proposal is that,the shock wave related parameter in the step S30 includes a liquid density ρ0The capacitance C of the energy storage capacitor, the propagation speed V of the shock wave in the liquid, the up-down distance d of the high-voltage electrode, the attenuation coefficient gamma of the shock wave and the distance r between the measuring point and the electrode.
The further technical solution is that the calculation formula in step S40 is:
Figure BDA0003084662000000034
Figure BDA0003084662000000035
P2＝P1-P0
in the formula: p1Rupture pressure, MPa; p2Is the impact pressure, MPa; p0Is hydrostatic pressure, MPa; eBkJ, shock wave energy to achieve rock fracture pressure; k. alpha and E are state parameters of the electrode spacing and are dimensionless; gamma is shock wave attenuation coefficient and is dimensionless; r is the distance between the measuring point and the electrode, m; v is the propagation speed of the shock wave in the liquid, m/s; u is the discharge voltage, kV; c is the capacitance of the energy storage capacitor, μ F; d is the upper and lower spacing of the high voltage electrodes, m.
The invention has the following beneficial effects: according to the method, the minimum and optimal construction pressure required by pre-treatment cracks before pressure is formed is obtained by calculating the fracture pressure of the reservoir rock mass; through the combination of calculation formula derivation of the electric pulse shock wave pressure and indoor test recording, accurate discharge parameters required by construction can be obtained; the method overcomes the blind area in the prior art, provides a new accurate calculation scheme, greatly improves the efficiency of crushing the compact reservoir by the pulse shock wave, effectively reduces the site construction cost, and obviously improves the pretreatment effect before electric pulse stamping.
Drawings
Fig. 1 is a schematic diagram of a typical pulse discharge experimental waveform.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a shock wave energy optimization method for electric pulse pretreatment before fracturing of a tight reservoir, which comprises the following steps of:
s10, selecting a proper core, processing the core into an experimental test piece, performing indoor test on the experimental test piece, performing three-axis mechanical tests including porosity, permeability and triaxial mechanical tests, acquiring stress parameters and geological physical parameters of a reservoir according to experimental results,
the mechanical parameters of the reservoir include the maximum horizontal principal stress sigma1Minimum horizontal principal stress σ2Formation pore pressure PpThe physical parameters of the reservoir stratum comprise porosity phi, Poisson ratio v and Boit coefficient delta, and the maximum breaking force P is obtained during the triaxial mechanical test of the rock;
step S20, determining the fracture pressure of the stratum according to the parameters of the reservoir rock sample collected in the step S10 when the reservoir rock sample is fractured;
burst pressure P1：
Figure BDA0003084662000000051
Stress coefficient K:
Figure BDA0003084662000000052
contact porosity phiC：φC＝φ+δ(1-φ)
Tensile strength S:
Figure BDA0003084662000000053
in the formula: p1Rupture pressure, MPa; sigma1Maximum horizontal principal stress, MPa; sigma2Is the minimum horizontal main factor, MPa; k is toForce coefficient, dimensionless; ppIs the formation pore pressure, MPa; s is tensile strength, MPa; phi is aCContact porosity,%; phi is porosity,%; nu is Poisson's ratio and is dimensionless; delta is a Boit coefficient and is dimensionless; p is the maximum tensile force when the test piece is damaged, and is MPa; d is the diameter of the cylindrical test piece, m; l is the length of the cylindrical test piece, m;
s30, performing indoor tests under different voltages by using an electric pulse device adopted in construction, recording test use parameters, and acquiring shock wave related parameters;
the shock wave related parameters specifically include the density p of the liquid used for testing0The discharge voltage U of the energy storage capacitor, the capacitance C of the energy storage capacitor, the propagation speed V of the shock wave in the liquid, the up-down distance d of the high-voltage electrode, the attenuation coefficient gamma of the shock wave and the distance r between the measuring point and the electrode;
step S40, finally, simultaneously obtaining the energy of the electric pulse shock wave required when the rock fracture pressure is reached according to the step S20 and the step S30, so as to obtain the proper construction voltage and the proper discharge frequency during pre-pressing pretreatment;
energy of shock wave generated by electric pulse device:
impact pressure P2：
Figure BDA0003084662000000054
Peak pressure P of shock wavem：
Figure BDA0003084662000000055
Energy E at breakdown of liquidB：
Figure BDA0003084662000000056
In the formula: p2Is the impact pressure, MPa; pmIs the wave front maximum pressure of the shock wave, MPa; gamma is shock wave attenuation coefficient and is dimensionless; r is the distance between the measuring point and the electrode, m; v is the propagation speed of the shock wave in the liquid, m/s; k. alpha and E are state parameters of the electrode spacing and are dimensionless; u isThe discharge voltage of the energy storage capacitor, kV; c is the capacitance of the energy storage capacitor, μ F; rho0Is liquid density, kg/m3(ii) a d is the upper and lower spacing of the high voltage electrode, m; eBkJ, shock wave energy to achieve rock fracture pressure;
when the rock fracture pressure is reached, the total pressure in the liquid is:
P1＝P2+P0
in the formula: p0Hydrostatic pressure, MPa.
According to the above formula, the impact pressure formula when the rock is broken is as follows:
P2＝P1-P0
and then finishing the previous formula to obtain the required energy:
Figure BDA0003084662000000061
calculating the required discharge voltage through a voltage energy formula:
Figure BDA0003084662000000062
examples
Taking an X block oil production adjacent well J23 of a certain oil field as an example, the burial depth of a hydraulic fracturing layer interval is designed to be 3834.1-3842.5 m. The reservoir temperature is about 85 degrees, and the fracture closure stress is about 50 MPa.
(1) The diameter D of the test core is 0.025m, the length L of the test core is 0.05m, and the maximum horizontal principal stress sigma is displayed according to the indoor test result169.69MPa, minimum level principal stress sigma2Is 62.31MPa and the formation pore pressure Pp37MPa and a porosity phi of 9.62 percent. Poisson ratio v is 0.28, Boit coefficient delta is 0.6, and fracturing fluid density rho used in construction planning is0Is 1.050g/cm3Deep hydrostatic pressure P in the target zone0About 40MP, and the maximum breaking tension P of the rock in a triaxial mechanical test is 142 MPa.
Wherein the maximum horizontal principal stress, the minimum horizontal principal stress, the formation pore pressure, the porosity and the Poisson' S ratio are obtained through the rock test result of the step S10; the Boit coefficient delta is a fixed coefficient value, the numerical range is 0.6-0.8, and the accurate value in the interval range can be obtained by performing regression processing on the test results of different rock cores in the same block; the density of the fracturing fluid is a parameter which is set according to well conditions.
(2) The tensile strength is obtained by the maximum tensile force when the test piece is damaged, the diameter of the test core and the length of the test core:
Figure BDA0003084662000000071
and (3) obtaining contact porosity: phi is aC＝φ+δ(1-φ)＝0.0962+0.6×(1-0.0962)＝0.69
Stress coefficient:
Figure BDA0003084662000000072
and (3) obtaining the fracture pressure of the rock body in a conclusion way:
Figure BDA0003084662000000073
(3) the electric capacity C of the energy storage capacitor of the electric pulse device is 100 muF, and the previous indoor test result shows that the propagation speed V of the shock wave in the liquid is 1500m/s, the vertical distance d between the high-voltage electrode and the electrode is 0.005m, the distance r between the measuring point and the electrode is 0.015m, the shock wave attenuation coefficient gamma is 2089, the state parameter k of the electrode distance is 9/d, alpha is 0.35, and E is 1.
Impact pressure: p2＝P1-P0＝74.84-40＝34.84
Required breakdown energy:
Figure BDA0003084662000000074
required discharge voltage:
Figure BDA0003084662000000075
(4) and (3) obtaining the fracture pressure of the rock body of the target reservoir stratum 74.84MPa through the step (2), obtaining the impact pressure for fracturing the rock 34.84MPa through the step (3), and obtaining the required discharge voltage of 5.7 kV.
Therefore, the formation can be fractured only when the discharge voltage is larger than the discharge voltage. The electrical pulse discharge construction parameters of the J23 well are obtained in conclusion and are shown in the table 1:
TABLE 1J 23 construction parameter table for well electric pulse discharge
Figure BDA0003084662000000081
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the above embodiments, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention.

Claims (6)

1. The shock wave energy optimization method for electric pulse pretreatment before fracturing of the tight reservoir is characterized by comprising the following steps of:
step S10, determining mechanical parameters and physical parameters of a reservoir according to mechanical experiments of reservoir rock samples;
step S20, determining the fracture pressure of the stratum according to the mechanical parameters and physical parameters of the reservoir;
step S30, performing indoor discharge test according to the electric pulse device to obtain shock wave related parameters in the liquid;
and step S40, determining proper construction discharge voltage required during pre-pressure pretreatment according to the fracture pressure of the stratum and relevant parameters of the shock wave.
2. Compact reservoir pre-frac electrical pulse pretreated shock wave energy of claim 1Optimization method, characterized in that the mechanical parameters of the reservoir comprise the maximum horizontal principal stress σ1Minimum horizontal principal stress σ2Formation pore pressure Pp。
3. The method for shock wave energy optimization of electric pulse pretreatment before tight reservoir fracturing of claim 2, wherein the physical parameters of the reservoir comprise porosity phi, Poisson's ratio v, Boit coefficient delta.
4. The method of shockwave energy optimization of electric pulse pre-fracturing of tight reservoir according to claim 3, wherein the formation fracture pressure is calculated by the formula:
Figure FDA0003084661990000011
Figure FDA0003084661990000012
φC＝φ+δ(1-φ)
Figure FDA0003084661990000013
in the formula: p1Rupture pressure, MPa; sigma1Maximum horizontal principal stress, MPa; sigma2Is the minimum horizontal main factor, MPa; k is a stress coefficient and is dimensionless; ppIs the formation pore pressure, MPa; s is tensile strength, MPa; phi is aCContact porosity,%; phi is porosity,%; nu is Poisson's ratio and is dimensionless; delta is a Boit coefficient and is dimensionless; p is the maximum tensile force when the test piece is damaged, and is MPa; d is the diameter of the cylindrical test piece, m; l is the length of the cylindrical test piece, m.
5. Tight reservoir pre-frac electrical pulse preconditioning as claimed in claim 1Method for shock wave energy optimization, characterized in that the shock wave related parameters in step S30 include liquid density ρ0The capacitance C of the energy storage capacitor, the propagation speed V of the shock wave in the liquid, the up-down distance d of the high-voltage electrode, the attenuation coefficient gamma of the shock wave and the distance r between the measuring point and the electrode.
6. The method for shock wave energy optimization of electric pulse pretreatment before tight reservoir fracturing of claim 5, wherein the calculation formula in the step S40 is as follows:
Figure FDA0003084661990000021
Figure FDA0003084661990000022
P2＝P1-P0
in the formula: p1Rupture pressure, MPa; p2Is the impact pressure, MPa; p0Is hydrostatic pressure, MPa; eBkJ, shock wave energy to achieve rock fracture pressure; k. alpha and E are state parameters of the electrode spacing and are dimensionless; gamma is shock wave attenuation coefficient and is dimensionless; r is the distance between the measuring point and the electrode, m; v is the propagation speed of the shock wave in the liquid, m/s; u is the discharge voltage, kV; c is the capacitance of the energy storage capacitor, μ F; d is the upper and lower spacing of the high voltage electrodes, m.
CN202110576766.4A 2021-05-26 2021-05-26 Shock wave energy optimization method for electric pulse pretreatment before fracturing of tight reservoir Active CN113216921B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110576766.4A CN113216921B (en) 2021-05-26 2021-05-26 Shock wave energy optimization method for electric pulse pretreatment before fracturing of tight reservoir

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110576766.4A CN113216921B (en) 2021-05-26 2021-05-26 Shock wave energy optimization method for electric pulse pretreatment before fracturing of tight reservoir

Publications (2)

Publication Number Publication Date
CN113216921A true CN113216921A (en) 2021-08-06
CN113216921B CN113216921B (en) 2022-11-18

Family

ID=77098559

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110576766.4A Active CN113216921B (en) 2021-05-26 2021-05-26 Shock wave energy optimization method for electric pulse pretreatment before fracturing of tight reservoir

Country Status (1)

Country Link
CN (1) CN113216921B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114352191A (en) * 2022-01-11 2022-04-15 北京三一智造科技有限公司 Stratum weakening pretreatment method and pore-forming method
CN115263265A (en) * 2022-08-10 2022-11-01 西南石油大学 Method for reducing reservoir fracture pressure based on discharge shock wave technology and application
WO2024021149A1 (en) * 2022-07-29 2024-02-01 西安交通大学 Libs optimization system and method integrating stress wave-shock wave diagnosis

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2007147227A (en) * 2007-12-21 2009-06-27 Шлюмберже Текнолоджи Б.В. (NL) METHOD FOR CONTROL OF DEVELOPMENT OF CRACK HYDRAULIC FRACTURE AND ITS GEOMETRY
CN103806911A (en) * 2014-03-07 2014-05-21 中国石油集团川庆钻探工程有限公司 Method for judging fluid type of reservoir by utilizing logging data of while-drilling drilling fluid
CN104832149A (en) * 2015-05-16 2015-08-12 太原理工大学 Electric pulse assisted hydrofracture unconventional gas reservoir permeability increasing method
CN108729913A (en) * 2018-05-25 2018-11-02 西安闪光能源科技有限公司 Controllable shock wave pre-cracking shale reservoir stratum method
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
CN109403937A (en) * 2018-11-05 2019-03-01 清华四川能源互联网研究院 A kind of blast wave generating apparatus of oil/gas well and well production increment method using shock wave
CN111271042A (en) * 2020-02-11 2020-06-12 西南石油大学 Displacement optimization method for forming complex fracture network by hydraulic fracturing of natural fracture development reservoir
US20200240246A1 (en) * 2016-10-28 2020-07-30 China University Of Mining And Technology Permeability enhancement method for coalbed methane wells by using electric pulse detonation fracturing technology

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2007147227A (en) * 2007-12-21 2009-06-27 Шлюмберже Текнолоджи Б.В. (NL) METHOD FOR CONTROL OF DEVELOPMENT OF CRACK HYDRAULIC FRACTURE AND ITS GEOMETRY
CN103806911A (en) * 2014-03-07 2014-05-21 中国石油集团川庆钻探工程有限公司 Method for judging fluid type of reservoir by utilizing logging data of while-drilling drilling fluid
CN104832149A (en) * 2015-05-16 2015-08-12 太原理工大学 Electric pulse assisted hydrofracture unconventional gas reservoir permeability increasing method
US20200240246A1 (en) * 2016-10-28 2020-07-30 China University Of Mining And Technology Permeability enhancement method for coalbed methane wells by using electric pulse detonation fracturing technology
CN108729913A (en) * 2018-05-25 2018-11-02 西安闪光能源科技有限公司 Controllable shock wave pre-cracking shale reservoir stratum method
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
CN109403937A (en) * 2018-11-05 2019-03-01 清华四川能源互联网研究院 A kind of blast wave generating apparatus of oil/gas well and well production increment method using shock wave
CN111271042A (en) * 2020-02-11 2020-06-12 西南石油大学 Displacement optimization method for forming complex fracture network by hydraulic fracturing of natural fracture development reservoir

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
贾少华 等: "《基于高压电脉冲煤体增透的水激波波前时间变化规律研究》", 《太原理工大学学报》 *
鲍先凯 等: "《电脉冲水力压裂煤体机理及裂缝效果评价》", 《水利水电技术》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114352191A (en) * 2022-01-11 2022-04-15 北京三一智造科技有限公司 Stratum weakening pretreatment method and pore-forming method
CN114352191B (en) * 2022-01-11 2023-11-21 北京三一智造科技有限公司 Stratum weakening pretreatment method and pore-forming method
WO2024021149A1 (en) * 2022-07-29 2024-02-01 西安交通大学 Libs optimization system and method integrating stress wave-shock wave diagnosis
CN115263265A (en) * 2022-08-10 2022-11-01 西南石油大学 Method for reducing reservoir fracture pressure based on discharge shock wave technology and application
CN115263265B (en) * 2022-08-10 2023-06-13 西南石油大学 Method for reducing reservoir fracture pressure based on discharge shock wave technology and application

Also Published As

Publication number Publication date
CN113216921B (en) 2022-11-18

Similar Documents

Publication Publication Date Title
CN113216921B (en) Shock wave energy optimization method for electric pulse pretreatment before fracturing of tight reservoir
US9567839B2 (en) Electrical and static fracturing of a reservoir
US9394775B2 (en) Electrical fracturing of a reservoir
CN105672972B (en) A kind of multi-stage water power sprays fracturing string method of evaluating performance
CN104481574A (en) Method for improving coal seam gas permeability through high energy acoustoelectric composite technology
CN107989586A (en) Coal bed gas well remodeling method based on the compound surge formula pressurized water injection of controllable shock wave
CN104018830A (en) Time and space evaluation method of coal seam hydraulic fracturing effect
RU2478780C1 (en) Method to produce rare metals using technology of drillhole in situ leaching and device for its realisation
CN109598029B (en) CO applied to high-gas coal roadway 2 Design method for high-pressure gas fracturing
CN104895543B (en) From the method for seam mining methane
CN106089174A (en) The method in hydrofracturing chemically expansible agent filling speedy drivage tunnel
Bao et al. Study on the damage model of coal rock caused by hydraulic pressure and electrical impulse in borehole
DE212020000825U1 (en) Modification device for natural gas hydrate resonant storage
CN115263265B (en) Method for reducing reservoir fracture pressure based on discharge shock wave technology and application
CN112709573B (en) Method for preventing and controlling rock burst of hard coal face based on controllable shock wave presplitting
CN112709571A (en) Coal mine tunnel rock burst prevention and control method based on controllable shock wave pre-splitting pressure relief
Bingnana et al. Experimental study on the discharging characteristics of pulsed high-voltage discharge technology in oil plug removal
CN113513293B (en) Oil gas production increasing method based on discharge plasma pulse shock wave acidification liquid injection promotion
Yan et al. Experimental Study on the Discharging Characteristics of Pulsed High-voltage Discharge Technology in Oil Plug Removal
CN109138960A (en) A kind of fracturing fluid and fracturing process
CN112557219B (en) Object model sample fracturing effect experimental device and experimental method based on controllable shock wave technology
Wang et al. Experimental Study on Hydraulic Fracturing of Laminated Sandstone Combined with Industrial CT and L-NMR
Liu et al. Enhanced oil recovery by repetitive electrohydraulic shock waves: fracturing and enhanced-permeability
CN111188603A (en) Water injection well augmented injection method based on controllable shock wave
RU2447278C2 (en) Method of hydraulic fracturing of bed

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant