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Rock fracturing simulation sample and preparation method, the simulation test device and method

A technology for simulating samples and simulating tests, which is applied in the preparation of test samples, measuring devices, and the use of stable tension/pressure to test the strength of materials, etc., which can solve the problems of less sensitive evaluation of shale fracture conductivity

Active Publication Date: 2019-03-26
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few evaluations on the conductivity sensitivity of shale fractures, and most of the existing tests on the conductivity of shale reservoirs are carried out by artificially preparing shale slabs, and there are few reports using shale real fractures Carrying out a test study on the diversion capacity

Method used

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  • Rock fracturing simulation sample and preparation method, the simulation test device and method
  • Rock fracturing simulation sample and preparation method, the simulation test device and method
  • Rock fracturing simulation sample and preparation method, the simulation test device and method

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Experimental program
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Embodiment 1

[0050] see attached figure 1 , the rock fracturing simulation sample provided by the first embodiment of the present invention includes a main body 1, a fracturing fluid injection pipe 5, a blind hole 2 is provided with an end face of the main body 1 as a starting point, and the fracturing fluid injection pipe 5 is fixedly connected to the blind hole 2 On the wall of the hole 2 , an accommodation space 3 is reserved between the bottom end of the fracturing fluid injection pipe 5 and the bottom end of the blind hole 2 .

[0051]The rock fracturing simulation sample provided in the first embodiment of the present invention includes a main body 1 and a fracturing fluid injection pipe 5, a blind hole 2 is provided with an end face of the main body 1 as a starting point, and the fracturing fluid injection pipe 5 is fixedly connected to the blind hole On the wall 2, an accommodation space 3 is reserved between the bottom end of the fracturing fluid injection pipe 5 and the bottom en...

Embodiment 2

[0055] see attached figure 2 , the preparation method of the rock fracturing simulation sample provided by the second embodiment of the present invention comprises the following steps:

[0056] Step 101: select rock samples for fracturing simulation test;

[0057] Step 102: Take one end face of the rock sample as the starting point, and drill a blind hole on the rock sample body;

[0058] Step 103: filling the blind holes with easily soluble salt substances, so that the easily soluble salt substances fill the volume of the reserved accommodation space;

[0059] Step 104: Place a partition above the easily soluble salt substance, the partition divides the blind hole into two spaces, the space at the bottom of the partition is a reserved accommodation space, and the space at the upper part of the partition Installation of sections for fracturing fluid injection pipes;

[0060] Step 105: Place the fracturing fluid injection pipe in the installation section of the fracturing f...

Embodiment 3

[0075] see attached image 3 , the rock fracturing simulation test device provided by the third embodiment of the present invention includes: image 3 The shown triaxial testing machine includes a triaxial chamber 11, an upper pressure head 14, a lower pressure head 15, a confining pressure oil injection system (not numbered in the figure), and a fracturing fluid injection pump (in the figure). Not shown), the rock fracturing simulation sample provided by the first embodiment of the present invention, the rock fracturing simulation sample is installed between the upper indenter 14 and the lower indenter 15, and the upper indenter 14 is provided with a through hole ( Not shown in the figure), a fracturing fluid injection pump (not shown in the figure) communicates with the fracturing fluid injection pipe 5 through a through hole (not shown in the figure).

[0076] On the basis of the rock fracturing simulation sample provided in the first embodiment of the present invention, w...

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Abstract

The invention discloses a rock fracture simulation sample and a preparation method thereof, as well as a simulation test device and a simulation test method and belongs to the technical field of rock simulation tests. The simulation sample comprises a body and a fracturing fluid injection pipe, wherein a blind hole is formed by taking one end surface of the body as a start point; the fracturing fluid injection pipe is fixedly connected with the wall of the blind hole; an accommodating space is reserved between the bottommost end of the fracturing fluid injection pipe and the bottommost end of the blind hole. The simulation sample can be prepared by the preparation method. The simulation test device comprises a triaxial test apparatus, wherein the triaxial test apparatus comprises a triaxial chamber, an upper pressing head, a lower pressing head, a confining pressure oil injection mechanism, a fracturing liquid injection pump and the rock fracture simulation sample. The simulation test method is realized on the basis of the simulation test device. According to the simulation test method, vivid complex fracture seams can be formed in a rock sample, and a fracture conductivity test is performed on the basis of the fracture seams, so that the obtained rock gas pool deliverability evaluation is relatively approximate to actual evaluation data, so as to guide actual work more objectively.

Description

technical field [0001] The invention relates to the technical field of rock simulation test, in particular to a rock fracturing simulation sample and preparation method, the simulation test device and method. Background technique [0002] With the adjustment of the global energy structure, the requirements for environmental protection are getting higher and higher. As an efficient and high-quality clean energy, shale gas is the best choice for realizing low-carbon consumption. The recoverable reserves of shale gas in my country are 36.08×1012m 3 , ranking first in the world; but because shale gas reservoirs are composed of lithified clay, organic matter and minerals, although organic matter can produce abundant shale gas, the voids between these well-textured rocks are too small. The permeability is low, and it is more difficult to exploit than conventional natural gas. In order to achieve efficient production, it is necessary to create an artificial fracture network throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12G01N1/28
CPCG01N1/286G01N3/12
Inventor 郭印同杨春和曾义金王磊徐峰
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI