Testing system and method for thermophysical properties of rock at high pressure

Abstract

The invention discloses a testing system for the thermophysical properties of rock at high pressure.The testing system comprises two pressure-resisting tanks, a high-pressure pump, a temperature monitoring module and a confining pressure monitoring module.The high-pressure pump is connected with a first cavity through a first communicating pipeline, wherein a first bleeder valve and a first pressure sensor are installed on the first communicating pipeline.A rock sample is installed in a second cavity, and temperature sensors are installed in the center and on the outer surface of the rock sample and in the second cavity respectively.The first cavity and the second cavity are communicated through a second communicating pipeline, wherein a second bleeder valve and a second pressure sensor are installed on the second communicating pipeline.The invention further discloses a testing method for the thermophysical properties of rock at high pressure.According to the testing system and method for the thermophysical properties of rock at high pressure, no electric heating heat source is needed, instant loading of the rock sample is achieved by rapidly switching on the bleeder valves, and the thermophysical properties of the rock sample at high pressure can be obtained through an established finite element numerical inversion model in combination with a global optimization method.

Description

technical field [0001] The invention relates to a rock thermophysical property testing system under high pressure conditions, and belongs to the technical field of rock thermophysical property testing. Background technique [0002] The thermophysical properties of the earth's interior rocks are the most basic physical parameters in the study of the earth's interior thermal structure, thermal evolution and geodynamics. Under different temperature and pressure conditions, the thermophysical properties of rocks are different. Therefore, it is of great significance to carry out in-depth testing and research on rock thermophysical properties under different confining pressure conditions. [0003] At present, the existing methods and systems for testing thermal physical properties of rocks under high pressure conditions are to assemble thermal physical property testing probes (including heating sources and temperature sensors) and rock samples in advance, and place them together ...

AI Technical Summary

Problems solved by technology

Therefore, the heating source and temperature sensor must be placed inside the rock at the same time, making the test system relatively complicated

Moreover, the thermophysical parameter test has particularly high requirements on the constant temperature of the ambient temperature. In the process of thermophysical property testing under laboratory conditions, the test system is usually in direct contact with the air, and it is difficult to test in a relatively constant temperature environment.

Because the fluctuation of ambient temperature is difficult to control, the test results are often greatly affected

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