Device and method for testing rock fracture seepage parameters under high temperature and high pressure conditions

Abstract

The invention provides a device for testing rock fracture seepage parameters under high temperature and high pressure conditions. The device at least comprises a tester framework, wherein a tester three-axis cylinder and a pressure head system are mounted in the tester framework, the pressure head system comprises an upper pressure head and a lower pressure head, and cylindrical samples are placed between the upper pressure head and the lower pressure head; the upper pressure head and the lower pressure head are mounted on the tester three-axis cylinder and are driven by the tester three-axis cylinder to pressurize the samples; a seepage water inlet is formed in the lower pressure head, a seepage water inlet pipe is arranged on the lower pressure head, a seepage water outlet is formed in the upper pressure head, and a seepage water outlet pipe is arranged on the upper pressure head; and an oil delivery pipe is connected to the tester three-axis cylinder, the other ends of the seepage water inlet pipe and the seepage water outlet pipe are connected with a seepage control system, and the other end of the oil delivery pipe is connected to a confining pressure control system. According to the device and the method, deficiencies in the prior art are solved, a seepage test under the high temperature and high pressure conditions can be realized, and the heat exchange efficiency in the seepage test can be tested. The device and the method have important significances to terrestrial heat exploitation.

Description

technical field [0001] The invention provides a device and method for testing seepage parameters of rock fissures, in particular to a device for testing parameters such as permeability coefficient and permeability of underground rock mass under specific temperature and confining pressure conditions under high temperature and high pressure conditions A device belongs to the technical field of mechanical devices. Background technique [0002] Geothermal resource is a typical clean energy, also known as "green energy" and "renewable energy", which has huge utilization value. The Enhanced Geothermal System (EGS) injects cold water, takes advantage of the nearly constant temperature of the deep underground, heats up the cold water, and pumps it out from the ground to obtain high-temperature water or steam for power generation. The seepage properties of the underground rock mass and the heat transfer efficiency during the seepage process are the key factors that determine the uti...

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Problems solved by technology

[0007] Most of the above invention patents are only applicable to low-pressure conditions, and cannot achieve precise control of cracks under high-temperature and high-pressure conditions, and there is no means to test heat exchange efficiency

However, the "Measurement Method and Device for Rock-Filled Fracture Permeability Considering the Effects of Multiple Factors" issued by China University of Mining and Technology is only applicable to the test of seepage in fractures containing filling materials, and cannot test the permeability properties of non-filled fractures.

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