Device and method for simultaneously measuring permeability coefficient, compressibility coefficient and porosity of rock

Abstract

The invention relates to a device and method for simultaneously measuring permeability coefficient, compressibility coefficient and porosity of rock. The device is composed of a pressure chamber, an upstream inlet, a downstream inlet, a peripheral pressure inlet, an upstream pump, a downstream pump, a peripheral pressure pump, a vacuum pump, a peripheral pressure valve, an upstream needle valve, a downstream needle valve, a vacuum needle valve, a vacuum valve, a separating valve, a vacuum gauge, an upstream pressure gauge, a downstream pressure gauge, a differential pressure gauge, a thermometer and a console. The device is reliable in principle and simple and convenient to operate, is suitable for dynamic measurement of seepage characteristic parameters and change characteristics thereof of rock under complex stress change conditions. By adopting the device, the permeability coefficient, compressibility coefficient and porosity of the rock under the stress coupling action can be simultaneously measured, experiment basis is provided for design, construction and safety evaluation of seepage associated engineering as well as qualitative and quantitative analysis of permeation change characteristics and rules of the rock under the complex stress change conditions, and actual engineering requirements are satisfied.

Description

technical field [0001] The invention relates to a device for simultaneously measuring rock seepage characteristic parameters (including permeability coefficient, compression coefficient and porosity), and a method for measuring rock seepage characteristic parameters by using the device. Background technique [0002] With the deep mining and safety evaluation of industrial projects such as low-permeability oil and gas reservoirs, as well as the recent research on CO 2 , nuclear waste and other energy and waste geological storage technologies, the research on the storage potential, mining efficiency and sealing ability of the above-mentioned industrial engineering reservoirs has become the focus of the work of geologists all over the world. For example, the evaluation of natural gas accumulation capacity and gas-bearing height, the evaluation of CO 2 Siting evaluation of storage formations, and evaluation of CO 2 Risk assessment of the formation after injection into the form...

AI Technical Summary

Problems solved by technology

At present, a single method and equipment are mostly used to measure the permeability characteristic parameters of rocks, such as measuring the permeability coefficient with a permeameter, measuring the porosity with a porosity meter, measuring the compressibility with a rheometer or the compressibility coefficient measurement method standardized by the petroleum industry. , then it is impossible to measure the above three seepage characteristic parameters of the same rock sample at the same time, let alone measure the change characteristics of the above three seepage characteristic parameters under complex stress changing conditions

Therefore, it is impossible to achieve the simultaneous measurement of multiple parameters of rock seepage characteristics with traditional methods or instruments, let alone monitor the change characteristics of multiple parameters of rock seepage characteristics under the condition of dynamic stress change

[0004] In order to overcome the single function of the traditional rock seepage test method and device, the single measured permeability parameter, and the narrow application range, it is impossible to simultaneously, quickly and accurately measure the rock seepage characteristic parameters, and it is impossible to simultaneously measure the rock seepage characteristic parameters under the condition of complex stress changes. In view of the shortcomings and deficiencies of the changing characteristics, it is necessary to design a multi-functional integrated rock seepage characteristic parameter simultaneous, fast, efficient and accurate measurement of the experimental method and measurement system. The compressibility coefficient and the rock porosity measured by the drainage method are used to solve the technical problem of fast and accurate measurement of the dynamic change characteristics of the permeability characteristic parameters of deep low-permeability reservoirs and cap rocks, and to study the reservoir reserve capacity, mining efficiency, and cap rock sealing performance. Provide an efficient measurement method, experimental basis and technical support for the design, construction and safety evaluation of related industrial projects

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