Non-linear Flow in Low Permeability Deformation Reservoir

The practical oil field development and experiment study shown that the mechanics of fluids flow is not consisting with Darcy formula in low permeability reservoirs. According to the experiment and pervious studies, the non linear flow model with two parameters was presented in this paper. On the basis of the model, the non linear flow model with deformation characteristics of the low permeability was established. The difference among Darcy model, Darcy model with deformation and non linear model with deformation were discussed by analysis and calculation of Daqing oil field examples. The results showed that draw down of non linear model with deformation were bigger than others. Well productivity decreased with increasing of the non-linear degree and deformation coefficient. The growth of PI slowed down with the increasing of drawdown. So, smaller well distance and higher injection/production pressure difference were needed for effectively developing low permeability deformation reservoirs.