低渗致密气藏防水锁剂配方性能评价  

Performance evaluation of waterproof locking agent for low-permeability tight gas reservoir

作　　者：曹伟佳[1,2] 亓玉坤 张晓芹 何欣 CAO Weijia;QI Yukun;ZHANG Xiaoqin;HE Xin(Key Laboratory of Enhanced Oil Recovery of Education Ministry,College of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China;Post-doctoral workstation,Daqing Petroleum Administration Bureau,Daqing 163453,China;R&D Center of Sustainable Development of Continental Sandstone Mature Oilfield,Daqing 163712,China;PetroChina Daqing Oilfield Co.,Ltd.,Exploration and Development Research Institute,Daqing 163712,China)

机构地区：[1]东北石油大学石油工程学院提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]大庆石油管理局博士后工作站,黑龙江大庆163453 [3]国家能源陆相砂岩老油田持续开采研发中心,黑龙江大庆163712 [4]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《石油化工》2024年第7期1006-1011,共6页Petrochemical Technology

摘　　要：基于吐哈油田低渗致密气藏,研发一种新型气藏防水锁剂GY-HE85,对其界面张力、表面张力和润湿性等基本性能进行研究,并分析了岩心渗透率恢复效果。实验结果表明,氟碳表面活性剂与碳氢表面活性剂复配后,碳氢表面活性剂除降低界面张力的作用之外,由于异电性亲水基之间强烈的静电吸引作用,表面活性剂分子在更低含量即可达到饱和吸附,还可降低表面活性剂的使用量。防水锁剂GY-HE85含量为0.1%~0.5%(w)的溶液时,表面张力为20.23~47.52 mN/m,随着溶液含量减小,拟黏附功逐渐降低,降幅呈“先快后慢”趋势,防水锁剂GY-HE85溶液优选含量为0.3%(w)。防水锁剂GY-HE85溶液具有较好的抗吸附性能,岩心渗透率恢复率在86.44%~91.20%,较好地预防了致密气藏储层“水锁”现象的发生。Based on the tight gas reservoir in the Tuha oilfield,a new gas reservoir waterproof locking agent GY-HE85 was developed.Its basic properties such as interfacial tension,surface tension,and wettability were tested and the recovery effect of core permeability was analyzed.Experiments show that,after the combination of fluorocarbon surfactant and hydrocarbon surfactant,hydrocarbon surfactant not only reduces the interfacial tension between oil and water but also achieves saturation adsorption at lower concentrations due to the strong electrostatic attraction between heteroelectric hydrophilic groups,which can also reduce the concentration of surfactants used.When locking agent GY-HE85 content is 0.1%-0.5%(w),the surface tension is evenly distributed between 20.23 and 47.52 mN/m.As the concentration of the solution decreases,the pseudo adhesion work gradually decreases,with a trend of“rapid decrease followed by slow decrease”.The optimal concentration is 0.3%(w).The waterproof locking agent GY-HE85 solution has good anti-adsorption performance,and the core permeability recovery rate is about 86.44%-91.20%.It effectively prevents the occurrence of“water lock”in tight gas reservoirs.

关 键 词：低渗致密气藏 防水锁剂 表面张力 拟黏附功 岩心渗透率恢复率 

分 类 号：TE377[石油与天然气工程—油气田开发工程]