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Rock fracture simulation sample and preparation method thereof, as well as simulation test device and simulation test 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: 2016-06-01
INST OF ROCK AND 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 fracture simulation sample and preparation method thereof, as well as simulation test device and simulation test method
  • Rock fracture simulation sample and preparation method thereof, as well as simulation test device and simulation test method
  • Rock fracture simulation sample and preparation method thereof, as well as simulation test device and simulation test method

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Experimental program
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Effect test

Embodiment 1

[0050] See attached figure 1 , The rock fracturing simulation sample provided by the first embodiment of the present invention includes a body 1, a fracturing fluid injection tube 5, a blind hole 2 is provided with an end surface of the body 1 as a starting point, and the fracturing fluid injection tube 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 by the first embodiment of the present invention includes a body 1, a fracturing fluid injection tube 5, a blind hole 2 is provided with an end surface of the body 1 as a starting point, and the fracturing fluid injection tube 5 is fixedly connected to the blind hole 2 On the wall, 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....

Embodiment 2

[0055] See attached figure 2 The method for preparing a rock fracturing simulation sample provided in the second embodiment of the present invention includes the following steps:

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

[0057] Step 102: Drill a blind hole in the rock sample body with one end face of the rock sample as a starting point;

[0058] Step 103: Fill the blind holes with easily soluble salt substances so that the easily soluble salt substances fill up the volume of the reserved accommodating space;

[0059] Step 104: Place a barrier above the easily soluble salt substances, the barrier divides the blind hole into two spaces, and the space at the bottom of the barrier is the reserved accommodation space, which is the space above the barrier Installation section for fracturing fluid injection pipe;

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

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 triaxial testing machine shown includes a triaxial chamber 11, an upper pressure head 14, a lower pressure head 15, a confining pressure oil injection system (not labeled in the figure), and a fracturing fluid injection pump (in the figure) Not shown), the rock fracturing simulation sample provided in 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, when the...

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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 tests, in particular to a rock fracturing simulation sample and preparation method, and 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, high-quality clean energy, shale gas is the best choice for 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 rich shale gas, the gaps between these clear-textured rocks are too small. The permeability is low and it is more difficult to extract than conventional natural gas. In order to achieve efficient mining, an artificial fracture network must be created through fracturing to form industrial p...

Claims

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Application Information

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Patent Type & Authority Applications(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 AND SOIL MECHANICS - CHINESE ACAD OF SCI
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