Influence of fracture parameters on inflow performance of fractured horizontal wells

Key words:  fractured horizontal well  fracture parameters  coupling model  inflow performance

Abstract:

Based on uniform flux pseudo steady state equivalent wellbore radius model, variable mass linear flow model of fractures, variable mass flow model of horizontal wellbore and completion skin factor model, according to the principle of potential superposition and continuity, a coupling model of variable mass flow in fractures and percolation in reservoir was developed. The influences of fractures half length, width and permeability on the inflow velocity and pressure drop distribution of horizontal wellbore, the inflow velocity and pressure drop distribution of fractures and the productivity of fractured horizontal wells were analyzed. The results show that, with the increase of fracture half length, width and permeability, the inflow velocity and output of horizontal section decrease and the output of whole fractured horizontal well and fractures increase. With the increase of fracture width and permeability, the inflow velocity of fracture increases and the pressure drop loss of fractures decreases. The inflow velocity and the pressure drop loss of fractures are relatively high when the fractures are far away from the wellbore.