Fracturing-flooding technology is a new approach for efficient development of low permeability reser-voirs,but there are still many unclear mechanism problems.In view of rock fracture damage process involved in fracturing-flooding,physical simulation method for fracturing-flooding is established based on triaxial stress fluid-structure coupling experiment instrument,intelligent permeability field inversion instrument and micron CT scan-ning instrument to clarify fracture distribution characteristics and its influencing factors.The results show that water injection during fracturing-flooding causes regional non-uniform damage to rocks around well,and reservoir rocks have fracture characteristics in large displacement range.Fracture distribution during fracturing-flooding is affected by viscosity and displacement of injected fluid.When injection parameters reach the condition of rock fracture,the lower the injection displacement and fluid viscosity are,the more favorable they are for forming complex fracture networks.Fracture aperture during fracturing-flooding increases with the increase of injected fluid viscosity and dis-placement.The research provides theoretical guidance for field fracturing-flooding.
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