Deep high-stress high-permeability environment simulation experiment system and experiment method thereof

Abstract

The invention discloses a deep high-stress high-permeability environment simulation experiment system and an experiment method thereof. The experiment system comprises a confining pressure system, a rock sample clamping mechanism, an axial pressure system, an osmotic pressure system, a rock sample volume change test system and a sound velocity real-time test system; the confining pressure system,the axial pressure system and the osmotic pressure system are each provided with a pressure stabilizing mechanism, most of the rock sample clamping mechanism is installed in a confining pressure cylinder of the confining pressure system, and a small part of the rock sample clamping mechanism is located in an axial pressure cylinder of the axial pressure system. The osmotic pressure system is divided into two parts which are arranged at the upper end and the lower end of the rock sample. According to the scheme, the pressure stabilizing mechanism is adopted for load application, so the problemof load fluctuation in the long-time testing process can be solved, and the testing result is more accurate. The invention further provides a rock immersion test and triaxial rheological test method for simulating the deep high-stress high-permeability environment condition, the method can restore deep occurrence characteristics, and therefore long-term mechanical behaviors and permeability characteristics of the deep rock mass are revealed more truly.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a deep high-stress and high-permeability environment simulation experiment system and an experiment method thereof. Background technique [0002] In order to meet the needs of human survival and development and explore the unknown mysteries inside the earth, the development and utilization of deep space resources has become the future trend of human activities and the main way for human sustainable development. At the same time, the rapid development of the world economy needs to consume huge amounts of resources, making the shallow resources of the earth gradually exhausted, and the exploitation of resources such as oil and gas, geothermal, coal mines, and metal mines continues to move to the deep earth, and the exploitation of deep resources will become the norm in the future. Therefore, marching into the depths of the earth has become a strategic scientific an...

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Problems solved by technology

In the long-term test process, the laboratory is prone to voltage instability during the peak period of electricity consumption, which affects the power of the pressure pump and thus affects the amount of oil injected into it, resulting in the oil in the confining pressure cylinder, axial pressure cylinder and seepage channel. The hydraulic pressure fluctuates, that is, the confining pressure, axial pressure and osmotic pressure cannot be kept stable, resulting in inaccurate experimental results

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