适合海上Q油田的活性聚合物调驱性能评价  

An Assessment of the Profile Control Capability of an Active Polymer for Offshore Q Oilfield Applications

作　　者：吴彬彬 陈斌 王成胜 吴晓燕 左清泉 WU Binbin;CHEN Bin;WANG Chengsheng;WU Xiaoyan;ZUO Qingquan(CNOOC EnerTech-drilling & Production Co. Ltd., Tanggu, Tianjin 300452, China;State Key Laboratory of Offshore Oilfield Exploitation, Tanggu, Tianjin 300452, China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津塘沽300452 [2]"海上石油高效开发"国家重点实验室,天津塘沽300452

出　　处：《西南石油大学学报（自然科学版）》2019年第3期100-106,共7页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：中国海洋石油总公司科技项目(CNOOC-KJ135KJXMNFGJ2016-04)

摘　　要：针对海上Q油田非均质性强及综合含水率高的问题,开展了活性聚合物调驱性能研究。研究中采用流变仪和界面张力仪考察了活性聚合物的增黏性和界面活性,采用室内物理模拟实验考察了相同黏度下活性聚合物的注入性、驱油能力以及不同注入方式下的驱油效率。研究结果表明,相比普通聚合物,活性聚合物增黏性好,具有低浓高黏特性;浓度高于400 mg/L时,油水界面张力低于11 mN/m;在注入岩芯时,岩芯末端起压明显,具有一定的深部调剖能力;相同黏度下活性聚合物的驱油效率要比普通聚合物高8.66%,聚合物与水交替注入时提高采收率幅度最高,达到22.34%。The profile control capability of an active polymer was studied to address the issues of high heterogeneity and overall high water content with offshore Q Oilfields. The viscosity-improvement capacity and interfacial activity of the active polymer were examined by a rheometer and an interfacial tensiometer, respectively. An indoor physical simulation experiment was then performed to examine the active polymer for its injection properties, oil displacement capability, and displacement efficiency using various methods of injection. The experimental results showed that, compared to common polymers, the active polymer showed better viscosity-improvement capacity, with low concentration but high-viscosity. At a concentration of above 400 mg/L, it resulted in an oil-water interfacial tension of below 11 mN/m. It was capable of in-depth profile control,as demonstrated by the evident pressure increase at the end of the rock core into which it was injected. Its oil displacement efficiency was 8.66% higher than that of common polymers of the same viscosity. In addition, it could improve the recovery rate by up to 22.34% when used along with water for alternative injection.

关 键 词：活性聚合物 增黏性 界面活性 调驱性能 注入方式 

分 类 号：TE65[石油与天然气工程—油气加工工程]