Mathematical model of nano /micron-sized polymeric particles flooding

In order to achieve the diversion of fluid flow, exploit the remaining oil in small pores and improve the oil recovery, a method of nano/micron-sized polymeric particles flooding was applied to low permeability reservoirs. The inhomogeneous flooding experiments show that the nano/micron-sized polymeric particles can greatly expand the wave volume and reduce the water content with an increase of 7.4%, 16.5% and 26.8% in the high, medium and low permeability layers, respectively. Based on the analysis of its percolation mechanism and percolation law, the mathematical model of nano/micron-sized polymeric particles flooding was established according to the mass transfer fluid mechanics, the chemical dynamics and the principle of material balance. The numerical simulation results show that it is feasible to carry out the nano/micron-sized polymeric particles flooding in low permeable and high water cut oilfields. It can increase the oil recovery of 7.6% and achieve better oil displacement effect.