Field-Scale Experimental Study on the Perforation Erosion in Horizontal Wellbore under Real Fracturing Conditions

Limited-entry fracturing (LEF) technology is a widely used method to realize the simultaneous propagation of multiple fractures in horizontal wells. The key this create high perforation friction maintain treatment pressure wellbore and uniform fluid entry multi-fractures; however, cannot be effectively maintained due serious erosion effect. Considering that current laboratory studies mostly small injection flowrate, low pressure, proppant dosage, study has developed field-scale flow system investigate effect various factors on under real field conditions. filed-scale uses trucks, proppant, perforated wellbore, rate through could reach 200 m/s 105 MPa. effects different parameters, such as rates, concentration, type, size, carrying viscosity, were investigated. experimental results show that: (1) during goes two stages, i.e., roundness stage diameter stage. reduction perforating mainly occurred first stage, which was completed after injecting 1 m3 proppant. (2) After erosion, changes from original circular shape trumpet shape, inner much larger than outer diameter. (3) more caused by conditions rate, large using ceramic viscosity fluid. findings can help for better understanding limited-entry wells, also promote establishment theoretical model