Cylindrical rock core true triaxial gripper

Abstract

A cylindrical rock core true triaxial gripper can be used to enforce three dimensional stress loading when making research on cylindrical rock core mechanical properties and seepage simulation test, simulate real bearing status of rock core underground, and accomplish true triaxial simulation experimental research of individually loading stress from three axial directions X, Y and Z of the cylindrical rock core. The cylindrical rock core true triaxial gripper is used to obtain physical parameters of stratum rock core under real state, guide the formulation of petroleum exploitation schemes and obtain good economic benefits.

Description

technical field [0001] The invention relates to the field of petroleum geology, and is a true three-axis holder for cylindrical cores used in seepage simulation experiments. The invention can make cylindrical cores simulate the real stress conditions in the ground, and can realize three axial directions of X, Y, and Z. The stress is loaded separately, so as to carry out experimental research on the true triaxial mechanical properties of the core and seepage simulation for the cylindrical core. Background technique [0002] Conventional core clamping equipment, which clamps the core by applying pressure on the periphery of the rubber cylinder to simulate the stress state of the rock in the formation, is widely used in various experimental studies in the petroleum and geological fields; its structure is usually uniaxial, For two-axis or false three-axis, a cylindrical rubber tube is generally used to cover the core, and the coating pressure is applied on the periphery of the r...

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Problems solved by technology

[0002] Conventional core clamping equipment, which clamps the core by applying pressure on the periphery of the rubber cylinder to simulate the stress state of the rock in the formation, is widely used in various experimental studies in the petroleum and geological fields; its structure is usually uniaxial, For two-axis or false three-axis, a cylindrical rubber tube is generally used to cover the core, and the coating pressure is applied on the periphery of the rubber tube, and the axial pressure is applied to the end face of the core to squeeze the core, so as to realize the function of clamping and sealing; the core in this The cylindrical surface in the holder is in a state of uniform stress, and there is no difference in direction. The simulated formation stress state cannot truly reflect the actual stress state of the core in the ground. Therefore, there will be a certain error between the experimental results and the real state.

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