Propagation simulation and permeability test integrated experimental device for true triaxial crack, and method thereof

A technology of crack expansion and experimental equipment, which is applied in the field of rock mechanics and engineering, and can solve problems such as cumbersome operation, complex structure, and difficulty in rock permeability testing

Inactive Publication Date: 2018-10-16
SOUTHWEST PETROLEUM UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, currently limited by the equipment conditions and methods of the fracture propagation simulation experiment, under the true triaxial stress condition, the test items of a single test are limited, and the characterization of the reconstruction effect before and after the hydraulic fracturing simulation experiment is not accurate. If the permeability test before and after fracturing is required , the equipment needs to be disassembled many times, and it is difficult to realize the permeability test of the rock before and after fracturing under in-situ conditions
[0005] CN105136646A discloses a permeation evolution experimental device and method considering shale adsorption and fracturing process, the experimental device includes a gas pressure fracturing system unit and a permeability measurement system unit; although it has realized the integration of fracturing and permeability testing, However, its gas pressure fracturing system unit and permeability measurement system unit have complex structur...

Method used

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  • Propagation simulation and permeability test integrated experimental device for true triaxial crack, and method thereof
  • Propagation simulation and permeability test integrated experimental device for true triaxial crack, and method thereof
  • Propagation simulation and permeability test integrated experimental device for true triaxial crack, and method thereof

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Embodiment 1

[0043] Embodiment 1, an experimental method integrating true triaxial fracture propagation simulation and permeability testing, which includes the following steps:

[0044] 1) Select natural or artificial rock, process the rock into a 40×40×40cm test piece, and then process and drill a central hole with a diameter of 2cm and a depth of 30cm at the center of one end of the test piece, and embed it in the central hole The fracturing tube is sealed with high-strength gel between the fracturing tube and the central hole, and then the test piece is sealed with a core sleeve, and the twelve sides and eight corners of the core sleeve and the test piece are pasted together with adhesive glue; The core sleeve is made of rubber resin material, the edge width is 35mm, the thickness is 1-3mm, and the eight corners adopt a conical structure, which plays the role of fully wrapping the eight corners of the test piece;

[0045] 2) Place the test piece in the pressure chamber of the true triax...

Embodiment 2

[0054] Embodiment 2, an experimental method integrating true triaxial fracture propagation simulation and permeability test, which includes the following steps:

[0055] 1) Select natural or artificial rock, process the rock into a 30×30×30cm test piece, then process and drill a central hole with a diameter of 2cm and a depth of 20cm at the center of one end of the test piece, and embed it in the center hole For the fracturing tube, prefabricate the sealing groove on the fracturing tube, and use the rubber ring to seal the gap between the fracturing tube and the central hole, and then use the core sleeve to seal the test piece, and use adhesive glue to connect the core set and the twelve pieces of the test piece. The sides and the eight corners are pasted together; the core sleeve is made of rubber resin material, the edge width is 25mm, the thickness is 1-3mm, and the eight corners adopt a conical structure, which plays the role of fully wrapping the eight corners of the test ...

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Abstract

The invention discloses a propagation simulation and permeability test integrated experimental device for a true triaxial crack, and a method thereof. The device comprises a true triaxial loading system, a fracturing system, an acoustic emission detecting system and a permeability testing system; and the fracturing system, the acoustic emission detecting system and the permeability testing systemcan be respectively connected with the true triaxial loading system according to experimental requirements. The device and the method realizes the integration of rock fracturing and permeability testing, can accurately measure the permeability before and after rock fracturing under true triaxial conditions, and provide a technical support for the studying of a fracturing technology and the optimization of fracturing construction parameters.

Description

technical field [0001] The invention relates to rock mechanics and engineering technology, in particular to an experimental device and method integrating true triaxial crack propagation simulation and permeability testing. Background technique [0002] With the emphasis on the exploration and development of unconventional oil and gas resources, especially the breakthrough in shale gas exploration and development technology, large-scale hydraulic fracturing technology has been widely promoted and applied in order to obtain efficient and economical single well production. Large-scale hydraulic fracturing technology has always been a key breakthrough and key research direction in the development of the shale gas industry, and fracture expansion is one of the key research contents of hydraulic fracturing technology, which directly affects the effect of hydraulic fracturing. At present, the main means of fracture propagation research are indoor experimental simulation technology ...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 贺培熊继有潘林华陆朝晖张烨邓智
Owner SOUTHWEST PETROLEUM UNIV
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