Study on Reasonable Pressure System of Water Flooding Reservoir

For water flooding heterogeneous reservoir, the reasonable formation pressure, injection pressure and flow pressure were studied, under different injection speed conditions. Through research we can see: (1) When the formation pressure is maintained near the saturation pressure, the recovery rate is the highest and the development effect is the best; (2) When the water flooding injection rate is 0.10PV/a, reasonable flow pressure range of (4.0-5.5) MPa, reasonable injection pressure range of (10.5-12.0) MPa. When the water flooding injection rate is 0.15PV/a, reasonable flow pressure range of (3.5-5.5) MPa, reasonable injection pressure range of (11.5-13.0) MPa. When the water flooding injection rate is 0.25PV/a, reasonable flow pressure range of (3.5-4.0) MPa, reasonable injection pressure range of (13.0-14.0) MPa; (3) By controlling the reservoir pressure, the injection pressure and the flow pressure, the pressure distribution is maintained within a reasonable range, and the streamline distribution is more uniform and the recovery rate can improve 1.34%.