Multiphase seepage medium triaxial stress seepage coupling test device capable of rapidly measuring porosity

Abstract

The invention discloses a multiphase seepage medium triaxial stress seepage coupling test device capable of rapidly measuring the porosity. The device comprises a gas seepage system and a triaxial type testing system, wherein the gas seepage system comprises a gas storage cylinder which is provided with a gas storage cylinder control valve; an outlet of the gas storage cylinder control valve is divided into an upstream gas pipeline and a downstream gas pipeline; the upstream gas pipeline is provided with an upstream gas pressure gauge and an upstream gas inlet valve; the downstream gas pipeline is provided with an exhaust valve; the upstream gas pipeline is communicated with the downstream gas pipeline in a converging way; the triaxial type testing system comprises a triaxial pressure chamber; the triaxial pressure chamber is connected on the upstream gas pipeline between the exhaust valve and the upstream gas inlet valve in parallel by a pipeline, and is respectively communicated the upstream gas pipeline and the downstream gas pipeline. After the multiphase seepage medium triaxial stress seepage coupling test device is used, the porosities of rocks with different lithological characters can be rapidly measured, and the rock permeability can be measured by a steady-state method and a pulse method by applying multiple seepage mediums such as water, gas and the like; the test device is high in accuracy and has the permeability measurement accuracy reaching up to 10-24m<2>.

Description

technical field [0001] The invention relates to a test device under complex stress-seepage conditions, in particular to a stress-seepage coupling test device that can quickly measure porosity and realize multi-phase seepage media. Background technique [0002] With the development of the national economy, the demand for energy is increasing, and energy issues have risen to the level of national strategy. At present, the exploitation of underground resources is not limited to traditional energy such as oil, and the exploitation of new energy such as shale gas is also gradually However, the process of resource exploitation must face the stability of the project under complex stress and seepage conditions. At the same time, this is also a problem that must be faced and solved in many water conservancy and hydropower projects in my country. And this kind of seepage is not only single-phase liquid seepage or single-phase gas seepage, but more complex situation where gas seepage an...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In view of the problems existing in the existing stress-seepage coupling test device, the present invention provides a multi-phase seepage medium triaxial stress-seepage coupling test device that can quickly measure porosity

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