True triaxial fracture seepage continuous test system and method

A test system, true triaxial technology, applied in the direction of applying stable tension/pressure to test material strength, measuring device, permeability/surface area analysis, etc., can solve the problem of fracture closure, single test plan, and can not truly reflect the fracturing effect and other issues to achieve the effect of optimal design
CN110426286APending Publication Date: 2019-11-08中国平煤神马控股集团有限公司 +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
中国平煤神马控股集团有限公司
Publication Date
2019-11-08

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Abstract

The invention discloses a true triaxial fracture seepage continuous test system and method, and belongs to the technical field of rock mass mechanics and engineering. The true triaxial fracture seepage continuous test system comprises a fracture seepage continuous test system, a true triaxial loading system, a confining pressure injection system, an acoustic emission monitoring system, a servo control system and a data acquisition and control system. Fracture seepage continuous testing is achieved by control over a pneumatic steering valve, the actual stress, temperature and seepage conditionof rock in stratum is simulated under effects of a temperature field, a seepage field and a stress field, fracture seepage continuous test is performed on a test piece so as to test a fracture effectof the rock, the crack initiation, expansion and opening and closing characteristic of a gap generated by a crack is completely monitored by the acoustic emission monitoring system, the gap formationand expansion mechanism is observed, analyzed and mastered, and theoretical foundation and experiment basis are provided for hydraulic fracturing of coal bed gas and shale gas.
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Description

technical field

[0001] The invention belongs to the field of rock mechanics and engineering technology, and in particular relates to true triaxial fracturing and seepage testing technology. Background technique

[0002] With the development of unconventional natural gas mining technologies such as coalbed methane and shale gas, fracturing seepage testing devices and methods have achieved many successes in recent years. Chinese patent documents related to true triaxial fracturing seepage methods and devices mainly include: CN103993867A "an experimental device and experimental method for simulating shale gas fracturing process"; CN102621000B "a true triaxial pressure device that can realize hydraulic fracturing tests"; CN104655495A "a kind of high temperature and high pressure true triaxial pressure device for coal rock Fracture seepage test device and test method"; CN103883301A "a physical simulation method for hydraulic fracturing of coalbed methane wells". Most of the exis...

Claims

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