低渗储层深度穿透酸化增注酸液体系优选  

Optimization of Acid Injection System for Deep PenetrationAcidizing of Low Permeability Reservoir

作　　者：师静静[1] 王小军[1] 黄新宇 SHI Jing-jing;WANG Xiao-jun;HUANG Xin-yu(Xingzichuan Oil Production Plant of Yanchang Oilfield Co.,Ltd.,Yan'an Shaanxi 717400,China;Shaannxi Yanchang Petroleum(Group)Pipeline Transportation Company,Yan'an Shaanxi 716000,China)

机构地区：[1]延长油田股份有限公司杏子川采油厂,陕西延安717400 [2]陕西延长石油(集团)管道运输公司,陕西延安716000

出　　处：《粘接》2020年第5期9-13,共5页Adhesion

摘　　要：为提高低渗储层注水开发效果,解决因长期注水过程造成储层堵塞,井口注入压力较大的问题。分析了研究院长6段储层敏感性及注入水水质,利用长6段储层岩心进行了室内实验,对土酸、氢氟酸、氟硼酸等多种酸液的酸蚀效果进行了测定,优选了复合酸作为主酸液体系。实验筛选了表面活性剂、缓蚀剂和粘土稳定剂等,最终优选出11%HCl+8%HBF4+5%HAc+1%HF+0.5%AE169+2%LHH+1%QCNW/0.3%BNFPJ作为深度穿透酸液体系,配伍性实验反应出该酸液体系适应性良好。In order to improve the effect of water injection development in low-permeability reservoirs,the prob⁃lem of high reservoir injection pressure due to long-term water injection process and blockage of reservoirs is solved.Reservoir sensitivity and water quality of the Chang 6 member of the research institute were analyzed.Laboratory experiments were performed using the Chang 6 member reservoir core,and the acid corrosion effects of various acid solutions such as soil acid,hydrofluoric acid and fluoboric acid were measured,and the com⁃pound acid was preferred as the main acid liquid system.The experiment screened surfactants,corrosion inhibi⁃tors and clay stabilizers,etc..Finally,11%HCl+8%HBF4+5%HAc+1%HF+0.5%AE169+2%LHH+1%QC⁃NW/0.3%BNFPJ as a deep penetration acid solution system,compatibility experiments show that the acid solu⁃tion system has good adaptability.

关 键 词：低渗储层 油井注水 储层敏感性 储层深度酸化 

分 类 号：TE348[石油与天然气工程—油气田开发工程]