METHOD FOR IDENTIFYING MEDIUM STRUCTURE COUPLING AND FRACTURE NETWORK MORPHOLOGY OF SHALE GAS RESERVOIRS

摘要

#$%^&*AU2020100760A420200618.pdf#####ABSTRACT The present invention provides to a method for identifying medium structure coupling and fracture network morphology of shale gas reservoirs, and pertains to the technical field of petroleum and natural gas exploitation. The method includes the following steps. Firstly, performing a fracturing test on shale cores by using a modified Brazilian disc test and categorizing the fracture network morphology. Secondly, performing a shale matrix-fracture structure and stress sensitivity test on the cores having different fracture morphology. After that, determining a stress sensitivity constant of different fracture network morphology according to indoor core data and finally preparing an identification chart of the fracture network morphology based on an indoor core stress sensitivity text combined with a production practice. The chart can be applied to an actual fracturing well, and the fracture morphology is directly identified by a real-time effective stress and a normalized flow, which has a profound significance on an implementation effect of performing volume fracturing on shale gas reservoirs and developing exploitation working systems.1/2 modified disc Brazilian test feather- tufted meshed treeU like fracture fracture like fracture network networ fracture etwork networ Ishale matrix-fracture structure and stress sensitivity test Effective stress ][a~jf nature network identification lizedflowchart by volume fracturing FIG. 1 feather-like tufted fracture network fracture network (C) meshed (d) tree-like fracture network fracture network FIG. 2