Influence of Long-term Water Flooding on Reservoir Permeability

Water flooding is the major measure to enhance oil recovery in Chinese oil fields.Permeability is an important symbol of the reservoir property.Long-term water flooding to permeability of the reservoir is highly related to the reservoir's property.For the high porosity and high permeability reservoir,after long-term water flooding,permeability shall be reduced,but the quantity of the core has no obvious change.