Rock thermophysical property transient test system and method under high temperature and high pressure

Abstract

The invention discloses a rock thermophysical property transient test system and method under high temperature and high pressure. The test system comprises a plurality of temperature measurement members; a heat preservation and pressurization device in which a pressurization and heating medium circulates and in which a rock sample isolated from the pressurization and heating medium is built, the heat preservation and pressurization device applying a set confining pressure to the rock sample and heating the rock sample, the rock sample being provided with a plurality of temperature measurementmembers; a heating control device used for setting the temperature and heating the heat preservation and pressurization device; a pressure applying device used for setting pressure to pressurize the heat preservation and pressurization device; a data acquisition device used for recording the change of the surface temperature of the rock sample along with time in the transient process; a cooling device used for cooling the rock sample when the measurement temperature of the rock sample reaches a set temperature; and a circulating passage, wherein the heat preservation and pressurization device,the pressure applying device and the cooling device are communicated through the circulating passage. The system can simultaneously measure the change of the heat conductivity and specific heat capacity of the rock sample along with temperature and pressure.

Description

technical field [0001] The invention belongs to the technical field of rock thermophysical property measurement methods, in particular to a system and method for transient rock thermophysical property measurement under high temperature and high pressure. Background technique [0002] Rock thermophysical parameters (such as thermal conductivity, specific heat capacity, etc.) directly affect the temporal and spatial evolution of rock temperature distribution, and are important in the fields of lithospheric thermal structure, thermal evolution history of sedimentary basins, geothermal, heavy oil thermal recovery, and oil shale pyrolysis. research content. Existing relatively mature experimental test devices can measure the thermal conductivity and specific heat capacity of samples under different temperature conditions, such as differential scanning calorimeter for measuring sample specific heat The thermal conductivity of the sample is obtained indirectly by measuring the the...

AI Technical Summary

Problems solved by technology

However, the existing technology predicts the heat transfer performance of rocks in deep underground rocks under high pressure and high temperature conditions with low accuracy and large errors, and the test system is relatively complicated, so it is impossible to obtain the experimental data of rock thermal conductivity and specific heat capacity in one experiment

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