Research Of Numerical Simulation On The Change Of Reservoir Parameters After Flood Development

During the flood development of oil field, reservoir physical characteristics have been continuously changed following the water that has been injected. In this paper, the distinguishing feature that permeability and viscosity dynamic changed following the multiplier of injected water, based on reasons which cause the change of reservoir characteristics is analyzed. A mathematical model which considers the time variables of permeability and viscosity is built, based on the expression of the multiplier of injected water which is derived accurately. The numerical model which is derived from the mathematical model is calculated by IMPES method. The software which considers the time variables is compiled.The new compiled software can calculate field models. It also can calculate laboratory models. The compared result of the new software and ECLIPSE indicates its justifiability. The field model and laboratory model is calculated by the software, and the results indicate that the time variables has effect on the water flood development. At last, the relationship of time variables and remaining oil is researched, and the reasons of the effect of time variables to water flood is analyzed from the remaining oil saturation angle.