红河长9油藏微乳降压驱油体系性能评价及现场应用  

Performance Evaluation and Field Application of Micro-emulsion Depressurization and Oil Displacement in Chang 9 Reservoir of Honghe Oilfield

作　　者：方群 FANG Qun(Research Institute of Petroleum Engineering,Sinopec North China Oil&Gas Branch,Zhengzhou 450000,Henan,China)

机构地区：[1]中石化华北油气分公司石油工程技术研究院,河南郑州450000

出　　处：《承德石油高等专科学校学报》2023年第1期17-20,共4页Journal of Chengde Petroleum College

基　　金：中国石化科技部项目(鄂尔多斯盆地中生界“断缝体”油藏高效开发关键技术):P21026。

摘　　要：为解决红河长9低孔特低渗储层基质区注水井注入压力高,已接近80%地层破裂压力的问题,通过降低界面张力及增溶原油来实现基质区的降压增油,结合室内评价,优选微乳液体系配方,可降低界面张力至10^(-2)mN/m,每30 mL微乳液增溶原油达到3~7 mL,同时优化微乳注入参数,质量分数为1%,驱替体积为2 PV,现场试验1井次,降压率达17.8%,对应油井含水降低4~6个百分点,日增油47.6%。Due to poor physical features of low porosity and super-low permeability in Chang 9 Reservoir of Honghe Oilfield,formation fracturing pressure has reached nearly 80%with increased water injection pressure.By reducing interfacial tension and solubilizing crude oil,the pressure reduction and oil increase in the matrix area can be realized.Micro-emulsion system is selected according to indoor evaluation,the system can reduce interfacial tension to 10^(-2) mN/m,and every 30 mL of micro-emulsion solubilizes crude oil to 3~7 mL,the micro-emulsion injection parameter is optimized.The mass fraction is 1%and the displacement volume is 2 PV.The field test shows that the reduction of injection pressure is 17.8%and water content of corresponding well is decreased by 4~6 points of percentage,daily oil production is increased by 47.6%.

关 键 词：特低渗储层 微乳体系 降压驱油 

分 类 号：TE357[石油与天然气工程—油气田开发工程]