海上低渗油藏耐温抗盐微球体系的研究与应用  

Research and Application of Heat-Tolerant and Salt-Resistant Polymer Microspheres in Offshore Reservoir with Low Permeability

作　　者：冯轩[1,2] 徐国瑞 刘丰钢[1,2] 郑玉飞 鞠野[1,2] 韩文彬 FENG Xuan;XU Guorui;LIU Fenggang;ZHENG Yufei;JU Ye;HAN Wenbin(China Oilfield Services Co.,Ltd.,Tianjin 300459,China;Tianjin Enterprise Key Laboratory of Exploitation of Offshore Oil Hard-to-Use Reserves,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司,天津300459 [2]天津市海洋石油难动用储量开采企业重点实验室,天津300459

出　　处：《当代化工》2024年第12期2915-2919,共5页Contemporary Chemical Industry

基　　金：中国海洋石油集团有限公司“三新三化”项目(项目编号:CNOOC-KJ SXSH YF 2021-01)。

摘　　要：针对海上高温高盐低渗油田注水开发效果较差的问题,研发耐温抗盐微球以实现稳油控水,利用理化性能评价、岩心驱替和微观驱替实验,研究耐温抗盐微球体系的静态表观性能、高温稳定性能、水化膨胀性能、注入性能、封堵性能、提高采收率性能和微观油水分布,分析了体系的作用机理。结果表明:NWY-1微球可形成均匀分散体系,高温老化40d能保持良好的稳定性;水化膨胀30d时可达粒径最大值7.70μm,延长水化时间粒径基本不变;在多孔介质内注入性和封堵性良好,岩心驱油实验可提高整体采收率7.9%;该体系可封堵多孔介质中的水窜通道,使后续的注入水流转向。矿场应用表明:注水井实现封堵,受效井产油明显增加,措施有效期长达262d,井组累计增油量达7829m3。Aiming at the problem of poor water flooding effect in offshore oilfield with high temperature and high salt and low permeability,heat-tolerant and salt-resistant polymer microspheres were developed to stabilize oil production and control water cut.The mechanism of the system was analyzed by physical and chemical properties evaluation,core displacement and microscopic displacement tests.The static apparent performance,high temperature stability,hydration expansion,injection performance,plugging performance,enhanced oil recovery performance and microscopic oil and water distribution of the heat-tolerant and salt-resistant microspheres system were studied.The experiment results showed that NWY-1 microspheres could form a uniformly dispersed system and maintain good stability after aging at high temperature for 40 d.The system reached a maximum particle size of 7.70μm after 30 d of hydration expansion and the particle size remained unchanged after the extension of hydration time.The injection and plugging properties of the system in porous media was good and the overall recovery factor was increased by 7.9%in core flooding test.The channel of water channeling in porous media was blocked by the system and the subsequent injection flow was diverted.The field application showed that the injection well was blocked and the oil of production well was increased significantly.The effective period of the measure was 262 d and the accumulated oil increase of the well group was 7829 m3.

关 键 词：聚合物微球 海上油田 高温高盐 深部调驱 低渗 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]