新型深穿透酸液体系在西峰油田长8特低渗透储层中的应用  

Application of a new-style acid fluid system with deeply pentrability in extra-low permeability reservoir in Chang8 of Xifeng Oilfield

作　　者：蒲春生[1,2] 郭艳萍 肖曾利[1] 石道涵[4] 李亚洲[4] 陈松 

机构地区：[1]西安石油大学陕西省油气田特种增产技术重点实验室,陕西西安710065 [2]中国石油大学(华东)提高采收率研究中心,山东东营257061 [3]中国石油川庆钻探工程公司井下技术作业处,甘肃庆阳745100 [4]中国石油长庆油田分公司第二采油厂,甘肃庆阳745100

出　　处：《油气地质与采收率》2008年第6期95-97,101,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家西部开发科技行动计划重大科技攻关项目“陕甘宁盆地特低渗油田高效开发与水资源可持续发展关键技术研究”(2005BA901A13)

摘　　要：针对西峰油田长8特低渗透储层注水井注水效果不好,欠注严重,普通酸液增注效果不理想的实际情况,通过岩心溶蚀实验,确定了该油田储层主体酸化用液配方,在此基础上研制了新型深穿透酸液体系SG-1。通过室内静态和动态实验,对该体系的防腐性能、防乳化及酸渣性能、稳定铁离子能力、防膨性能、配伍性、注入性能、热稳定性及岩心酸化效果等进行了评价。现场试验结果表明,使用新型深穿透酸化体系SG-1后,西峰油田西31-14井在油压为18.4MPa的条件下,注入量达到41m3/d,吸水指数达到了2.23m3/(d·MPa),与措施前相比,注入量增加了19m3/d,吸水指数提高了85.6%,有效地解决了油藏的欠注问题,并取得了较好的增油效果,具有良好的推广应用价值。There are problems in extra-low permeability reservoir in Chang8 of Xifeng Oilfield such as ineffective water flooding,serious lack of water,poor effect with common acid. By the core dissolution experiment,the main acid formula was defined,and a new acid system SG-1 was developed. By the laboratory and dynamic tests,the performance of corrosion control,non-emulsificalion and acid tar,resistant ferric ion,antiswelling,compatibility,injectivi-ty,heal resistance and core aciding effect of the acid system were evaluated. The test data shows that the water injection increased I9mVd and the water injectivity index increased 85.6% after u-sing the acid system SG-1 under the condition of 18.4MPa of oil pressure. The issue of insufficient injection has been solved and oil production had increased. The research proves that the new-style acid fluid system is worth of being spread widely.

关 键 词：特低渗透储层 深穿透酸化体系 室内研究 现场试验 西峰油田 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]