Disclosed is a method for identifying the medium structure coupling and seam mesh morphology of shale gas reservoirs, which belongs to the technical field of petroleum and natural gas mining. A fracturing test is first performed on a shale core by using a modified Brazilian pressure splitting experiment, and seam mesh morphologies are classified; shale matrix-crack structure and stress sensitivity experiment testing are then conducted on cores with different crack morphologies; stress sensitivity constant ranges for different seam mesh morphologies are then obtained according to indoor core data; and a seam mesh morphology identification pattern is finally drawn based on the indoor core stress sensitivity experiments and in combination with actual production. The pattern can be applied to a well with an actual fracture, and fractured crack morphology can be identified directly by means of real-time effective stress and normalized flow, which is of great significance to the implementation effect of volumetric fracturing in shale gas reservoirs and the formulation and development of a working system.
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