Method for testing mechanical strength parameters of sand-mudstone interbedded rock based on penetration hardness experiment

Abstract

The application provides a kind of sand and mudstone interbedded mechanical strength parameter test method based on indentation hardness experiment, and relates to the technical field of rock mechanics of petroleum engineering, comprising: determining the Poisson's ratio and internal friction angle of sand and mudstone core sample;Based on the indentation hardness experiment of sand and mudstone core sample, the indentation hardness is measured;According to the Poisson's ratio, internal friction angle and indentation hardness, the uniaxial compressive strength of sand and mudstone core sample is calculated through uniaxial compressive strength theoretical model, as the mechanical strength parameter of sand and mudstone interbedded layer.The uniaxial compressive strength of rock is obtained by replacing uniaxial compression experiment with indentation hardness experiment, and the required core quantity is less, the cost is low, and the problem of downhole coring is solved.

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