Experimental method and device for indirect fracturing physical simulation between coal seam and interlayer horizontal wells

Abstract

The present application provides a kind of coal seam interlayer horizontal well indirect fracturing physical simulation experimental method and device, comprising: obtaining sandstone perforation position and mudstone perforation position respectively;Rock sample production is carried out, rock sample includes interlayer and two coal seams bonded and stacked on the upper and lower interfaces of interlayer, and the rock sample is fractured by blocking method;The contact area of fracture and coal seam and fracturing fluid fracture efficiency of post-pressing rock sample are collected, and the hydraulic energy utilization rate is evaluated according to the contact area of fracture and coal seam and fracturing fluid fracture efficiency;The segmented cluster fracturing horizontal wellbore of interlayer composite rock sample containing mudstone uses 60 ° phase angle horizontal and downward directional perforation.The present application can avoid the situation of fracturing failure, evaluate the hydraulic energy utilization rate in the whole fracturing process by combining the contact area of fracture and coal seam and fracturing fluid fracture efficiency, provide accurate fracturing data basis for coalbed methane exploitation in practice, and maximize the use of hydraulic energy of fracturing.

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