Study on stress sensitivity of bedding fractures and sand-filled fractures in shale oil reservoirs

Shale oil reservoirs are characterized by low porosity and ultra-low permeability, hydraulic fracturing technology is needed to realize industrial flow. The sand-filled fractures formed in the shale process bedding developed reservoir itself interact form a fracture network system, which main migration channel for production. Studies have shown that higher degree of development, stronger stress sensitivity reservoir, sensitive damage an important factor causes decline seepage capacity during In this paper, based on samples Jiyang Depression, flow experiments were carried out analyze characteristics fractures, clarify mechanism complex shale. Provide experimental data theoretical support productivity prediction block after fracturing.