Analysis of development characteristics of surfactant flooding pilot test in Chang 8 reservoir of L38 area
The reserves and production of ultra-low permeability reservoirs in Huanjiang oilfield account for a large proportion,and the water flooding contradiction is prominent after a well network water injection development.The performance evaluation results of surfactant show that the surfactant flooding test can greatly reduce the interfacial tension,with anti-ad-sorption,change wettability under low concentration and other effects,expand the range of two-phase co-permeability area,and improve the oil displacement efficiency by 5.53%.In the middle of L38 area,four injection and production well groups were selected to carry out pilot tests.After continuous injection for 8 months,the water flooding contradiction was im-proved,the effect of water control and oil increase was significant,the development index was improved,and the water flooding dynamic reserves increased by 1.07 times.
NETL
NSTL
万方数据
维普
