摘要
针对海上K油田注入压力高、储层纵向吸水不均、高渗储层窜流明显以及常规调剖调驱体系难注入等问题,开展层内自生气调驱技术研究。针对目标油藏条件,对层内生气调驱体系配方以及体系静态性能和驱油能力进行实验研究,实验结果表明:室内所筛选层内生气调驱体系配方为8%自生气体系+0.5%起泡剂,该体系驱油效率在水驱基础上提高19.1%,具有良好的注入性和调驱性能。通过渤海K油田的现场试验,该技术可大幅降低油井含水率,其中典型见效井含水最高下降13%,最大日增油23.6 m^(3),5个月累积增油4300 m^(3)余方。
In order to solve the problems of high injection pressure,uneven vertical water absorption of reservoir,obvious channeling of high permeability water flow and difficult injection of conventional profile control in offshore K oilfield,this paper studies the technology of self-generation and drive control in the formation of the oilfield.Based on the target reservoir condition,the formula of profile control and flooding system as well as the static performance and oil displacement capacity of the system are experimentally studied,and the formulation of formation profile control and displacement system in the indoor selected intra-layer is determined:8%self-generation system+0.5%foaming agent.The experimental results showed that the system has good injecting and profile control performance,and the oil displacement efficiency is 19.1%higher than that of water flooding.The technology has been successfully applied in K oilfield in Bohai Sea.The maximum water cut of typical effective wells has been greatly reduced by 13%,and the maximum daily oil production has increased by 23.6 m^(3).At present,the validity period of the technology has been up to 5 months and the cumulative oil production has increased by 3000 m^(3).
作者
左清泉
赵军
郑继龙
刘浩洋
陈平
胡雪
吴彬彬
ZUO Qingquan;ZHAO Jun;ZHENG Jilong;LIU Haoyang;CHEN Ping;HU Xue;WU Binbin(CNOOC Energy Tech-Drilling&Production Co.,Ltd.,Tianjin 300452,China;State Key Laboratory of Offshore Oil Efficiency Development,Tianjin 300452,China)
出处
《应用科技》
CAS
2021年第5期99-104,共6页
Applied Science and Technology
关键词
层内生气
自生气调剖
自生泡沫
泡沫综合值
生气效率
驱油效率
驱油性能
起泡性能
in-situ gas generation
self-ignition profile control
self-foam
foam comprehensive value
product-gas efficiency
displacement efficiency
displacement performance
blister performance
