摘要
针对胜利油区孤东油田六区西北部的特点,在前期孤东油田七区先导试验基础上,进行了驱油体系配方优化设计和方案优化研究,并编制了矿场实施方案。通过对该方案进行跟踪研究,系统总结了二元复合驱矿场动态见效特征,并对其影响因素进行了分析。二元复合驱后,注入压力呈先升后略降再升的趋势,吸聚剖面得到持续改善,单元阻力系数明显上升,增油幅度大、速度快,原油物性趋势表现为先降后增再降的特点,二元复合驱降水增油效果明显优于聚合物驱。单井之间见效效果主要受注入状况和油藏非均质性的影响。综合分析认为聚合物驱转二元复合驱是有效的,可为其他地区方案实施提供借鉴。
In response to the geological features of northwest 6 block,Gudong oilfield,and the based on the preceding pilot test of 7 block of Gudong oilfield,the oil displacement system optimization and project plan amelioration are studied to propose the field application program.Through the following study on this project plan,the field performance of polymer-surfactant composite driving is general-ized systematically,and the influencing factors are further analyzed.After the polymer-surfactant injection,the injection is in the trend of first rising then dropping little and then rising again,and the injection-absorption profile ameliorated persistently,and the unit resistance coefficient rising apparently,highly oil enhancement,high oil increment rate,and the oil property is in trend of first dropping then rising and then dropping ultimately,that is,the polymer-surfactant driving is apparently better than the polymer injection in terms of constraining water cut and oil enhancement.Moreover,the performance is mainly influenced by the injection status and reservoir heterogeneity.It is thought that the switching from polymer to polymer-surfactant is effective and may offer reference for other blocks.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第6期65-67,共3页
Petroleum Geology and Recovery Efficiency
基金
国家重大专项"高温高盐油田提高采收率技术"(2008ZX05011)
关键词
二元复合驱
见效特征
影响因素
提高采收率
孤东油田六区
polymer-surfactant displacement method
response characteristic
influence factor
enhanced oil recovery
Gudong oil-field
