Servo control true triaxial fluid fracturing and joint network monitor test system

Abstract

The invention belongs to the field of rock mechanical test devices, and particularly provides a servo control true triaxial fluid fracturing and joint network monitor test system which is aimed at solving the problem that an existing rock fracturing test system is simplex in function. The test system comprises a pressing plate assembly, a test bin assembly, a fluid fracturing system, a sound emission system and a confining pressure loading system. During a test, a sample is placed in the pressing plate assembly, the pressing plate assembly is then conveyed into the test bin assembly, the sample in the pressing plate assembly is pressurized through the confining pressure loading system connected to the test bin assembly, the underground stress state of rock is simulated, then high-pressure fluid is led into the pressing plate assembly through the fluid fracturing system, fracturing is conducted on the sample, and the formation of rock cracks is monitored in real time through the sound emission system in the fracturing process. By means of the test system, not only can the true triaxial confining pressure simulation be conducted on the rock sample, but also the formation process of the rock cracks can be monitored in real time.

Description

technical field [0001] The invention belongs to the field of rock mechanics test equipment, and specifically provides a servo-controlled true triaxial fluid fracturing and fracture network monitoring test system. Background technique [0002] Rocks are the product of the evolution process of geological processes, with diversity in types, complexity and variability in properties. In engineering practice, engineers often use axisymmetric loading conditions to simulate and analyze complex site conditions. However, rocks in actual engineering are in a state of unequal pressure triaxial stress. [0003] In the process of shale gas exploitation, artificial fracturing of the reservoir is required to increase the density of fractures in the shale, thereby forming a complex fracture network and achieving the effect of increasing permeability and gas production. Fluid fracturing, such as hydraulic fracturing and supercritical carbon dioxide fracturing, is the best way to achieve volu...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the existing rock fracturing test system cannot monitor the formation of rock cracks in real time while simulating the true triaxial confining pressure of the rock, the present invention provides a servo-controlled real Triaxial fluid fracturing and fracture network monitoring test system, the test system includes a pressure plate assembly and a fluid fracturing system and an acoustic emission system connected to the pressure plate assembly, the test system also includes a test chamber assembly and a The confining pressure loading system connected to the chamber assembly, the pressure plate assembly is used to place the test sample; the test chamber assembly is used to place the pressure plate assembly during the test; the fluid fracturing system is used to fracturing the test sample; The acoustic emission system is used to monitor the cracks produced by the test sample; the confining pressure loading system is used to provide the test sample placed in the pressure plate assembly with pressure in the directions of the three coordinate axes of X, Y and Z

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