Numerical Simulation of Nonlinear Seepage in Super-low Permeability Reservoir

摘要

The fluid seepage in the super-low permeability reserves conforms to the nonlinear seepage law, and according to this characteristic, the nonlinear seepage numerical simulation software has been developed. In addition, a nonlinear seepage model considering the nonlinear bending section is established in this paper. Moreover, with the combination of field application and laboratory experiment data, an ideal model of diamond inverted nine spots well pattern is also built. Besides, the simulation result of different well spacing and well array, different fracture penetration ratio and different fracture conductivity is comparative analyzed. The result shows that: the smaller the well spacing and well array is, the higher the oil recovery and water cut;the target block has an optimal fracture penetration ratio, which is about 0.28;artificial fracture conductivity has little effect on the oilfield development.