1、 Overview: Microbial profile control and displacement technology is a technology combining profile control and oil displacement system. Microbial method is used to limit or reduce the water absorption capacity of high permeable layer (section) and improve the water absorption capacity of low permeable layer (section) in water injection well, so as to improve the water injection profile of water injection well, improve the water drive sweep volume, and at the same time, cooperate with the injection of corresponding oil displacement system to achieve the purpose of improving the water drive effect The technological measures to improve oil recovery.   2、 Technical advantages: Green, environmental protection, no damage to the formation, environmentally friendly. With strong pertinence, different injection systems are developed for different blocks. Improve water injection profile, expand sweep volume and improve oil washing efficiency. Low cost, good effect, in line with the oilfield "cost reduction and efficiency increase".   3、 Application scope: This technology is mainly suitable for the reservoir environment with prominent interlayer contradictions and strong heterogeneity in the later stage of water injection. By adjusting the water injection channel, expanding the swept volume, and cooperating with the corresponding oil displacement system, the ultimate goal of improving oil recovery is achieved.