Numerical Simulation of Injection Parameters of Polymer/Surfactant Binary Composite Flooding in High Watercut Reservoir

摘要

Due to the limitations of laboratory experiments in parameter optimization of binary compound flooding systems and the uncertainty of optimization results of the field tests, the authors have applied the numerical simulation analysis to optimization of the injection parameters of binary-compound flooding systems in the 552 high-watercut reservoir of Xinjiang oilfield. The tNavigator software was used to study the impact of the parameters including polymer concentration, surfactant concentration, slug size, and injection rate on the increase of the recovery rate. The results show that when the concentration of polymer solution is 1000 mg/L, the surfactant content is 0.3, the slug size is 0.5 PV, and the injection rate is 0.1 PV, the estimated efficiency of the binary-composite flooding system is 18.6 times higher than that of the water flooding..