Changing Rules of Reservoir Physical Parameters under the Condition of Long-term Flooding

Water injection is the main method to enhance oil recovery in majority oilfields of China.Water flooding has great impact on physical parameters of reservoir.Based on the laboratory experiment,through the water flooding and white oil displacement with long time,it shall measure the core permeability,porosity and quality before and after displacement.The analysis shows that under water flooding and white oil injection,the permeability decrease,the porosity and quality of the sandstone cores have a little change.