Test device, method and system for testing characteristics of shale

Abstract

The invention provides a test device, method and system for testing characteristics of shale. The method comprises the following steps of applying a preset normal stress to a test sample in a rock core groove of a U-shaped test clamp, applying a horizontal stress to a flat plate test clamp for enabling the flat plate test clamp to have a preset loading speed, and carrying out shear friction operation on the test sample; according to sample rock debris of the shear friction operation, determining components of the test sample; and according to the components of the test sample, the preset normal stress and the preset loading speed, determining the characteristics of the shale. According to the test device, method and system for testing the characteristics of the shale, provided by the invention, the mechanics characteristics of the shale can be truly reflected; and the shale characteristic test analysis in different stress states can be realized more efficiently and conveniently by changing the stress.

Description

technical field [0001] The invention relates to the technical field of rock characteristics in shale oil and gas storage, in particular to a test device, method and system for testing shale characteristics. Background technique [0002] Shale oil and gas is an unconventional resource with great potential, which has been successfully developed in North America and my country, and has become a new field of global oil and gas exploration. Horizontal well volume stimulation has become the main mode of shale oil and gas development, which requires in-depth analysis and research on the mechanical properties of shale rocks. For horizontal well volume stimulation, shale compressibility is a key parameter to evaluate whether shale oil and gas reservoirs can be effectively fractured. [0003] Aiming at the steady-state-unsteady-state characteristics of shale oil and gas reservoirs, although some foreign scholars have made qualitative evaluations on the unsteady-state crack propagatio...

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Problems solved by technology

[0003] Aiming at the steady-state-unsteady-state characteristics of shale oil and gas reservoirs, although some foreign scholars have made qualitative evaluations on the unsteady-state crack propagation of highly brittle shale cracks by monitoring the micro-seismic signals during fracturing field operations, while scholars in the seismic industry Carry out laboratory experiments and use the velocity-state constitutive equation to quantitatively evaluate the steady-state-unsteady-state characteristics of fault gouges. However, there is no comprehensive research on the steady-state-unsteady-state characteristics of shale oil and gas reservoirs at home and abroad. Experimental research and analysis of

Because the mineral components of different shale reservoirs vary greatly, it is troublesome to artificially synthesize rock samples similar to fault gouge, and the authenticity of the mineral components will be lost. Therefore, in order to more comprehensively evaluate the shale brittleness, help to better select the sweet spot of fracturing engineering, improve the effect of fracturing operation, and realize the increase of shale oil and gas single well production, there is an urgent need An experimental test and analysis method suitable for shale properties

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