Detection device and detection system for rock sample pressurization test

Abstract

The invention provides a detection device and a detection system for a rock sample pressurization test. The detection device for the rock sample pressurization test comprises a base, a sound wave detector and a plurality of supporting plates, the base is provided with an installation face, the supporting plates are arranged on the installation face, the plate faces of the supporting plates extend in the length direction of the base, and the plate faces of the supporting plates make contact with a to-be-tested rock sample; at least one supporting plate is provided with a containing groove, and the sound wave detector are arranged in the containing groove in a one-to-one correspondence mode. The supporting plates comprise floating supporting plates and a plurality of fixed supporting plates, the floating supporting plates are fixed to the middle of the base through elastic pieces, and the floating supporting plates can move in the direction perpendicular to the plate faces of the floating supporting plates relative to the base; the fixed supporting plates are arranged on the sides of the floating supporting plates, and the fixed supporting plates are detachably fixed to the base. The detection device for the rock sample pressurization test provided by the invention can realize layered detection of the horizontal stress of the rock sample.

Description

technical field [0001] The present application relates to rock pressure detection technology in the field of oil production, in particular to a detection device and a detection system for pressure testing of rock samples. Background technique [0002] In the process of oil and gas development, it is necessary to use hydraulic fracturing technology to break the formation to produce hydraulic fractures, through which the oil in the formation can be drained. [0003] Specifically, during the on-site construction process, the fracturing fluid is injected into the wellbore through the high-pressure pump group, and the high pressure is gradually raised at the bottom of the well. When the pressure reaches the rock fracture pressure, the formation ruptures at this time and produces hydraulic fractures, and the more hydraulic fractures , the smaller the seepage resistance, thereby increasing the oil drainage and increasing the oil and gas production. In the process of reservoir stim...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing commonly used true triaxial hydraulic fracturing simulation experiments, the entire unidirectional stress is applied to the rock sample during the hydraulic fracturing experiment, but due to the heterogeneity of the rock sample in the actual formation, the formation Due to the different thickness and complex properties, the formation stress gap is large. At this time, because the thickness and hardness and softness of each bedding of the rock sample are different, it is impossible to simulate the impact under different formation stresses in the process of fracturing experiments that only apply unidirectional stress. The effect of crack propagation

Therefore, the existing true triaxial hydraulic fracturing simulation experiment system has the following problems: first, it is difficult to control the thickness, stress, and interface strength of each layer of the rock sample; second, it cannot simulate the stratum on different bedding planes in the same direction Stress distribution effect; third, due to the different bedding and mechanical characteristics of rock samples, it is impossible to analyze the crack initiation and propagation laws of different beddings under different formation stresses during the experiment

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