Laboratory experiment on enhancing conventional heavy oil recovery by microbubble-enhanced S/P binary flooding
In response to the requirements of chemical flooding technology for enhancing the recovery of conventional heavy oil,a novel chemical flooding system was investigated.Through the meticulous selection of high-efficiency binary formulations and the dispersion of microbubbles,an S/P binary combined flooding system enhanced by microbubbles was constructed.The displacing effects of conventional heavy oil and associated mechanisms were studied.The results show that the dissolved gas method for constructing a microbubble-enhanced system is simple and practical.The generated microbubbles,with an average diameter of 26.7 μm,can be uniformly dispersed in the conventional efficient binary system.The system exhibits good injectability,a strong ability to increase the resistance coefficient,and a high residual resistance coefficient.In addition to the recovery mechanisms present in the conventional binary combined flooding,the superimposed Jamin effect as well as the synergistic emulsification carrying effect generated by microbubbles significantly increase the system's sweeping capacity and oil displacement efficiency.Under the modeled heterogeneous conditions,microbubble enhanced binary flooding achieves an additional 12％OOIP compared with the effect of ordinary binary flooding.This study provides a valuable technical approach for exploiting conventional heavy oil by chemical flooding.
conventional heavy oilbinary combined floodingmicrobubblesynergistic effectEOR
万方数据
维普
