Whole-process evaluation method for self-supporting flow conductivity of fracturing crack

The invention discloses a whole-process evaluation method for self-supporting flow conductivity of a fracturing crack, which mainly comprises the following steps: collecting a reservoir section outcrop with a natural crack, cutting into a cubic rock sample and drilling; after a well hole is cleaned, sealant is selected for consolidation of a shaft and a rock sample; a true triaxial confining pressure device system is constructed, and a rough fractured rock plate is obtained through fracturing; scanning the wall surface of the crack by using a 3D laser scanner to obtain point cloud data of the wall surface; calculating a roughness JRC value by using the point cloud data; the novel flow guide chamber device for testing the self-supporting flow conductivity of the fracturing crack is constructed, and the change rule of the self-supporting flow conductivity under the conditions of different closing stresses, different slippage amounts and different roughness degrees is evaluated. According to the method, the rock