Coal rock porosity, permeability and electroacoustic stress-strain combined measuring device under overburden pressure and heating

Abstract

The invention relates to a coal rock porosity, permeability and electroacoustic stress-strain combined measuring device under overburden pressure and heating. The coal rock porosity, permeability and electroacoustic stress-strain combined measuring device is provided with an incubator, wherein a supporting rod, a comprehensive gripper, a pushing platform, a cushion block and a coal sample are arranged in the incubator, the upper part of the comprehensive gripper is provided with an experimental oil pipe, the experimental oil pipe is inserted into the coal sample, the upper part of the experimental oil pipe is sequentially connected with an electromagnetic valve e, a standard chamber, a pressure gauge b, an electromagnetic valve c, a barometric regulator and a gas booster pump, an inlet of the gas booster pump is communicated with a gas cylinder through a lead wire, and the upper part of the experimental oil pipe is sequentially connected with a pressure gauge c, an electromagnetic valve d, a water pressure regulator, a liquid booster pump and a water tank. The coal rock porosity, permeability, and electroacoustic stress-strain combined measuring device can be used for effectively simulating the high temperature and high pressure geological environment under deep complicated formation conditions to obtain the porosity, the gas-water relative permeability, a stress-strain curve, the resistivity and the acoustic velocity of the coal rock sample under the same experimental conditions, thus effectively saving the sample, improving the accuracy and the comparability of experimental data, and bringing the great convenience for scientific research.

Description

technical field [0001] The invention relates to a measuring device for coal and rock parameters, in particular, it can obtain the porosity, gas-water relative permeability, stress-strain curve, resistivity and sound wave velocity of coal and rock samples at one time under the same experimental conditions. Coal rock pore seepage acoustic stress-strain joint measurement device under pressure and temperature. Background technique [0002] At present, domestic instruments can be found in the QSXS-Ш type gas-water relative permeability tester developed by Nantong Feiyu Petroleum Technology Development Co., Ltd., which can measure the relative permeability of coal rock gas-water under different temperature confining pressure; Shandong Zhongshi Dashi Instrument The high-temperature pressure-covered hole permeability tester developed by Technology Co., Ltd. can simulate the high-temperature and high-pressure conditions of deep formations, and test the porosity and permeability of co...

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Problems solved by technology

[0003] In order to solve the problem that the existing measuring device cannot realize the joint measurement of coal porosity-permeability-stress-strain-acoustic wave-resistivity, the present invention provides a covering Under pressure and temperature, coal rock pore seepage acoustic stress-strain joint measurement device, the device can effectively simulate the geological environment of high temperature and high pressure in deep complex formation conditions, using the standard chamber method, gas flowmeter, liquid flowmeter, stress The porosity, gas-water relative permeability, stress-strain curve, resistivity and sound wave velocity of coal and rock samples can be obtained under the same experimental conditions, which effectively saves samples, increases the accuracy and comparability of experimental data It improves work efficiency and brings great convenience to scientific research work

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