Experimental investigation of hydraulic fracture propagation inn fractured blocks

摘要

Natural fractures in reservoirs can be the cause of many adverse effects during hydraulic fracturing treatment. In the present paper, hydraulic fracturing tests are used to investigate the interaction of a propagating hydraulic fracture with a natural fracture in the fractured blocks. Systematic experiments were designed and performed on the cement blocks with different pre-existing fracture strikes and dips (30A degrees, 60A degrees and 90A degrees). The effect of horizontal stress difference o