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分析了连续出砂的岩石破坏机理,即岩石的剪切破坏和拉伸破坏。按剪切破坏准则确定了出砂临界井底压力;按拉伸破坏准则确定了油层出砂临界压差。
The failure mechanism of continuous sand production was analyzed, that is, shear failure and tensile failure of rock. According to the shear failure criterion, the critical bottom hole pressure of sand production was determined. According to the criterion of tensile failure, the critical pressure difference of sand production was determined.