Electrical Analog Experiment of Integral Fracturing with Rectangular Combined Well Pattern

Horizontal well fracturing had been used only as a measure for single well stimulation without considering its effect on injection-production pattern,therefore,this paper provided research on integral fracturing.From the viewpoint of fracturing,horizontal well integral fracturing with rectangular combined well pattern was designed.Based on the principle of water/electricity analogy and the electric simulation experiment,the seepage flow characteristics of rectangular combined well pattern and the productivity of horizontal well were simulated,and the parameters of fracturing were optimized.The results showed that the transformed well pattern had broadened the swept range of injection pressure,productivity increased 1.5-2.0 times;the increase in fracture number was favorable for the improvement of injection efficiency,for the same length of horizontal section,the productivity of oil well would increase 0.3-0.5 times if one crack was added;the longer the horizontal section of injection well was,the bigger the swept range of water-flooding front,and the higher the control degree of water flooding.This showed that horizontal well integral fracturing of rectangular combined well pattern was better than that of conventional well pattern.