Mechanism and Pressure Behavior of Fracturing Flooding Wells in Tight Reservoir

Abstract

Fracturing flooding is a new energy-supplement technique emerging in recent years, which requires delivering high-efficiency oil agents to the sites with enriched remaining oil through fracturing. In this paper, we introduce the main characteristics of fracturing flooding technique. The pressure responses of induced horizontal fracture of injection well is obtained by modelling the fluid flow in the fractures with variable-mass-radial flow by point source method. The fracture-closure induced flow-rate change is considered by Duhamel’s principle. Compared with conventional fractured well, the fracture properties in fracturing flooding wells vary with time during the shut-in testing period since they are not strengthened by proppants. Linear-flow analysis, fracture-storage coefficient analysis, and fracturing flooding interference analysis methods are comprehensively discussed and compared to estimate the fracture parameters based on the measured bottom-hole pressure data.