Abstract
In order to provide reference and help for sand production control in deep tight sandstone gas reservoirs. Taking Keshen block as the research object, the sand production mechanism is analyzed and verified by experiments. The additional pressure difference, fracture development and reservoir reconstruction are considered. Through the establishment of rock mechanics model, hole additional pressure difference physical model experiment, acid rock test. It is concluded that the main sand production mechanism of this formation is shear failure, additional pressure difference of rock, sand production easily caused by natural fracture development, and rock strength decreases after acid fracturing. The rock strength decreases by 20%.
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