Measuring device for thermal conductivity of rock under high temperature and high pressure conditions

Abstract

The invention relates to a measuring device of rock thermal conductivity at high temperature and high pressure. The measuring device is characterized in that a normal pressure applying device and a normal force load sensor are arranged at the upper part of an experiment bin; a confining pressure applying device and a confining pressure sensor are arranged at the side surface; a cylindrical heat absorbing device is arranged at the top part, a water circulating heat radiating device is arranged at the outer surface, and a water inlet and a water outlet are arranged at both sides; a force transfer column in the middle part is also used as a heat conduction column; the upper and lower cross sections of a testing specimen are sealed by sealing rings, and thermocouples are arranged at the upper and lower cross sections; one side of the oil cavity is provided with an oil conveying pipeline, a temperature controller and a heater; a water circulating heat radiating device is arranged at the outer surface of the cylindrical heat absorbing device; a buffer plate is arranged between the cylindrical heat absorbing device and a to-be-measured sample; the upper and lower cross sections of the sample are sealed by sealing rings, and a sample steel sleeve and a rubber sleeve are arranged at the outer surface of the sample to form an oil cavity; a data collection device controlled by a computer is arranged in the measuring device. The measuring device has the advantages that the thermal conductivity of the rock in each direction can be tested, and the thermal conductivity and anisotropy of the rock under the natural occurrence condition are studied; the structure is scientific and reasonable, the manufacturing is convenient, and the operation is easy.

Description

technical field [0001] The invention relates to a test device, in particular to a measuring device for rock thermal conductivity under high temperature and high pressure conditions, which is suitable for measuring the thermal conductivity of rocks at different temperatures and pressures, and is especially suitable for heterogeneous materials. Background technique [0002] Thermal conductivity is one of the basic properties of rocks. It is an important research content of rock thermal conduction law and thermal environment change law. It plays an important role in various engineering thermal analysis related to rocks, such as: numerical simulation in the process of petroleum thermal recovery Influence analysis of steam injection volume, steam injection speed and ultimate recovery in calculation and engineering design, recharge simulation and feasibility analysis and evaluation of oil well geothermal water injection production; thermal fracture analysis in high temperature rock...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned thermal conductivity instruments are more or less unable to meet the following problems: under normal temperature conditions, they do not meet the requirements of actual conditions; they cannot measure the thermal conductivity of rocks in each direction, and cannot accurately describe the anisotropy of thermal conductivity of rocks, resulting in a negative impact on the overall thermal conductivity of rocks. The description is inaccurate; the triaxial confining pressure is complicated and difficult to control; the hydraulic control operation is complicated; the adaptability to rock material tests of various sizes is not strong; the automation level of the equipment is not enough, etc.

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