特低渗油藏活性二氧化硅驱油技术应用

Application of active silica oil displacement technology in ultra-low permeability reservoir

创新提高特低渗油田采收率新方法,按经济性将四种常用表面活性剂复配,进行流动和驱油特征分析,评价改性纳米二氧化硅驱油剂性能。通过对三叠系延长组长6层注水井驱油效率试验,证明改性纳米驱油剂在特低渗储层驱油中稳定性良好,调驱效果较好。

Innovate a new method to improve oil recovery in ultra-low permeability oilfield,mix four common surfactants according to economy,analyze the flow and oil displacement characteristics,and evaluate the performance of modified nano silica oil displacement agent.Through the oil displacement efficiency test of Chang 6 water injection well in Yanchang formation of Triassic system,it is proved that the modified nano oil displacement agent has good stability and displacement effect in ultra-low permeability reservoir.