海上油田二元复合驱末期段塞优化提效室内物理实验

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英文篇名：Laboratory Experiments on Optimization and Lift Efficiency of Late Stage Slug for Binary Compound Flooding in Offshore Oilfield 作者：孟祥海 ; 杨二龙 ; 韩玉贵 ; 赵鹏 ; 张晓冉 ; 冉令博 ; 李月 英文作者：MENG Xianghai;YANG Erlong;HAN Yugui;ZHAO Peng;ZHANG Xiaoran;RAN Lingbo;LI Yue;Bohai Petroleum Research Institute,Tianjin Branch Company,China National Offshore Oil Corp.China Limited;School of Petroleum Engineering,Northeast Petroleum University; 关键词：海上油田 ; 段塞优化 ; 物理实验 ; 表面活性剂、聚合物二元复合体系 ; 交替注入 英文关键词：offshore oil field;;slug optimization;;physical experiment;;binary compound system;;alternating injection 中文刊名：YJHX 英文刊名：Oilfield Chemistry 机构：中海石油(中国)有限公司天津分公司渤海石油研究院;东北石油大学石油工程学院; 出版日期：2019-06-25 出版单位：油田化学 年：2019 期：v.36;No.140 基金：“十三五”国家重大专项“渤海油田高效采油工程及配套技术示范”(项目编号2016ZX 05058003) 语种：中文; 页：YJHX201902028 页数：6 CN：02 ISSN：51-1292/TE 分类号：151-156

摘要

渤海某表面活性剂/聚合物(SP)二元复合驱油田目前已进入SP二元复合驱开发末期,存在吸水差、聚合物突进等问题,为指导目标油田SP二元末期开发方案调整、提升化学驱开发效果,设计三管并联人造岩心驱替实验,模拟油田实际开发历程,研究了同等经济条件下不同浓度的聚合物保护段塞以及"高浓度聚合物-SP二元复合体系"交替注入的驱油效果。研究结果表明:保护段塞注入压力随着聚合物浓度增加而增大,且与交替周期无关;交替注入中聚合物浓度为2500 mg/L的驱油效果略好于2000 mg/L,两个周期驱油效果较一个周期好;对于目标油田,末期合理的开发方案为在目前注完0.2 PV SP二元复合体系后,注入聚合物浓度2500 mg/L、段塞尺寸0.08 PV的高浓度聚合物段塞与SP二元复合体系交替两个周期,对于指导海上油田SP二元复合驱末期开发方案调整有重要的意义。图4表8参13
        A binary compound flooding oilfield in Bohai Sea has entered the end of binary compound flooding development,which has the problems of poor water absorption and polymer penetration. In order to adjust the development plan of the end of surfactant-polymer binary compound flooding(SPBCF) of the target oil field and improve the effect of the chemical drive development,a three pipe parallel artificial core displacement experiment was designed to simulate the actual development process of the oilfield and the displacement effect of polymer-protected slug with different concentration and "high concentration polymer-SPBCF" alternate injection under the same economic conditions was studied. The experimental results showed that the injection pressure of protective slugs increaseed with the increase of polymer concentration,and had nothing to do with alternate cycles. In alternate injection experiments,the displacement effect of polymer concentration with 2500 mg/L was slightly better than that of 2000 mg/L,and the displacement effect of two cycles was better than that of one cycle. For the target oilfield,the reasonable development plan for the end of composite flooding was that after the 0.2 PV SP flooding was injected,the high concentration polymer slug with the polymer concentration of 2500 mg/L and the size of 0.08 PV,and the SP composite system would be injected alternately two cycles. It is of great significance to guide the adjustment of offshore oil field development plan at the end of SP flooding.

引文

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