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True triaxial hydraulic fracturing experiment device and method with CT real-time scanning

A hydraulic fracturing and experimental device technology, applied in measurement devices, using stable tension/pressure to test material strength, instruments, etc., to achieve rich research, uniform loading, and rich research effects

Pending Publication Date: 2020-05-05
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to equipment limitations, CT scans are often performed after the coal and rock mass is unloaded from the true triaxial hydraulic fracturing test bench, and it is impossible to observe

Method used

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  • True triaxial hydraulic fracturing experiment device and method with CT real-time scanning
  • True triaxial hydraulic fracturing experiment device and method with CT real-time scanning
  • True triaxial hydraulic fracturing experiment device and method with CT real-time scanning

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation examples.

[0039] Such as figure 1 , figure 2 Shown is a true triaxial hydraulic fracturing experiment with CT real-time scanning, including a true triaxial pressure chamber, a support for carrying the experimental device, a loading device, a pump pressure system, a CT scanning system, and a control and monitoring device. The true triaxial pressure chamber is composed of a cover plate 101 and a cylinder body 103. An oil inlet 102 and a central hole are left on the cover plate. The lower part of the body 103 is provided with an oil discharge port 104 .

[0040]The above-mentioned bracket is composed of a column 201, a top plate 202, and a bottom plate 203; the column runs through the preset through holes on the four corners of the top plate 202 and the bottom plate 203 to form a bracket; the top plate 202 and the bottom plate 203 a...

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Abstract

The invention provides a true triaxial hydraulic fracturing experiment device with a CT real-time scanning. The true triaxial hydraulic fracturing experiment device comprises a true triaxial pressurechamber, a support, a loading device, a pumping pressure system, a CT scanning system and a control / monitoring device. The true triaxial pressure chamber comprises a cover plate and a cylinder body. The support comprises a top plate, a bottom plate and stand columns, and the devices located in the CT scanning area are all made of carbon fiber materials. The loading device comprises an axial pressure loading device, a lateral pressure loading device and a confining pressure loading device and is used for providing axial pressure, lateral pressure and confining pressure required by an experiment. The pumping device comprises an injection pump and a fracturing pipe to control the water pressure required by the experiment. The CT scanning device comprises a CT radioactive source and a CT detector and is used for observing the internal change of the test piece in real time. The monitoring / control device comprises an acoustic emission sensor, a micro-seismic sensor and a fluid pressure sensor. Besides, the invention further discloses an experiment method. Real-time matching of hydraulic fracturing and CT scanning under true triaxial stress is achieved. The experiment method has importantsignificance in researching conditions such as fracture development and form of the test piece, and guidance is provided for engineering practice.

Description

technical field [0001] The invention relates to a physical simulation experiment research of hydraulic fracturing, and is especially suitable for a true triaxial hydraulic fracturing experimental device and method with CT real-time scanning. Background technique [0002] The geometric state of hydraulic fractures is one of the main factors affecting the fracturing results. For economical and effective fracturing, the fractures should be extended in the reservoir as much as possible and prevent the penetration of water layers and low-permeability layers. This requires a deep understanding Based on the law of fracture propagation, the parameters of fracturing operations are optimized, and effective measures are taken to control the propagation of fractures. At the same time, the stress environment of the deep coal / rock mass is in a state of three-dimensional unequal pressure (that is, a true triaxial stress state). Carrying out research on the crack propagation effect of coal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N3/02
CPCG01N3/12G01N3/02
Inventor 王凯郭阳阳杜锋董虎子娄振张翔
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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