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A method for studying the fractal particle size of multi-stage fracturing proppant and rock mass fracture characteristic parameters

A technology of fracturing proppant and characteristic parameters, which is applied in the direction of applying stable tension/pressure to test material strength, soil material testing, material inspection products, etc., and can solve the problem that the relationship between fracturing fluid and rock fracture wall cannot be measured problems with description

Inactive Publication Date: 2014-10-29
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for studying the fractal particle size of multi-stage fracturing proppant and rock mass fracture characteristic parameters, which is used to solve the existing problem that the relationship between fracturing fluid and rock mass fracture wall cannot be measured and described

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  • A method for studying the fractal particle size of multi-stage fracturing proppant and rock mass fracture characteristic parameters
  • A method for studying the fractal particle size of multi-stage fracturing proppant and rock mass fracture characteristic parameters
  • A method for studying the fractal particle size of multi-stage fracturing proppant and rock mass fracture characteristic parameters

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[0025] The present invention will be further explained below in conjunction with the drawings:

[0026] The device of the present invention such as figure 1 As shown, this method of studying multi-stage fracturing proppant fractal grain size and rock mass fracture characteristic parameters is in figure 1 In the device shown. details as follows:

[0027] The first step: through the proppant particle multi-stage fractal sorting device, select the proppant particle sieve apertures of different sizes to form a proppant particle size distribution with fractal characteristics, where the first-stage proppant particle diameter satisfies ; The second-stage particle diameter satisfies: ; The third-level particle diameter meets: ; Select proppant particle size for any grade, that is, the selected sieve aperture size; For any grade particle diameter less than The estimated mass of proppant particles; Is the total mass of the sorted proppant; It is the average particle size of proppant a...

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Abstract

The invention relates to the method for researching the fractal particle size of a multistage fracturing propping agent and the fracture characteristic parameter of a rock mass, which comprises the following steps of: (1) selecting a particle screen, and forming propping agent particles with fractal characteristic; (2) preparing the sorted first order of propping agent particles into a fracturing liquid; (3) injecting the prepared fracturing liquid into a test piece, and calculating the fractured wall opening degree of the test piece; (4) preparing the second order of propping agent particles sorted in the step (1) into a fracturing liquid, and calculating the rock mass fracture opening degree after secondary fracturing; (5) preparing the third order of propping agent particles sorted in the step (1) into a fracturing liquid, and calculating the rock mass fracture opening degree after multistage fracturing; and (6) taking down the test piece, and calculating the fractal dimensionality of the fractured wall of the test piece. In the invention, the field multistage fracturing process is simulated, and the relationship between different propping agent particle sizes and the roughness of the fractured wall of fractured rock and the relationship between particle size and fracture opening degree can be determined.

Description

1. Technical Field: [0001] The invention relates to a multi-stage hydraulic fracturing sand distribution fractal design method in petroleum and natural gas, mining, geotechnical and other projects, and specifically relates to a method for studying the fractal granularity of multi-stage fracturing proppants and rock mass fracture characteristic parameters. 2. Background technology: [0002] In the field of oil and natural gas, coal rock mass and other reservoir exploitation technologies, it is necessary to fracturing the reservoir rock. The mechanism of action is to use the ground high-pressure pump set to exceed the reservoir fluid absorption capacity and discharge high viscosity fracturing The liquid is pumped into the well to generate high pressure at the bottom of the well. The high pressure drives the water flow to squeeze into the rock mass, overcome the rock mass's tensile strength, and cause the rock mass to rupture, forming a fracture channel with a certain conductivity. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24G01N3/10
Inventor 赵万春付晓飞艾池王婷婷孙玉学孙晓峰
Owner NORTHEAST GASOLINEEUM UNIV
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