渤海A油田酸化解堵实验研究及现场应用  

Experimental Study and Field Application of Acid Resolving Plugging in A Oilfield of Bohai Sea

作　　者：张子之 李源 张东 曹志兴 徐振 程垚 刘宇龙 ZHANG Zizhi;LI Yuan;ZHANG Dong;CAO Zhixing;XV Zhen;CHENG Yao;LIU Yuong(CNOOC Tianjin Branch,Tianjin 300452,China;CNO0C Energy Technology&Services Limited,Tianjin 300452,China;School of Petroleum Engineering,Yangtze University,Jingzhou Hubei 434023,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452 [2]中海油能源发展股份有限公司,天津300452 [3]长江大学石油工程学院,湖北荆州434023

出　　处：《当代化工》2024年第4期914-920,共7页Contemporary Chemical Industry

基　　金：中海油重大科技专项,渤海油田上产4 000万吨新领域勘探关键技术(No.CNOOC-KJ 135 ZDXM 36 TJ 08 TJ)。

摘　　要：渤海A油田在开发过程中生产井产液量下降明显,注水井注水压力升高,注水难度大,考虑是地层敏感性矿物和泥质的运移导致孔喉堵塞。针对以上问题,对该油田的地质特点进行研究,分析了地层堵塞原因。在此基础上进行了室内实验,研究出了一套氟硼酸主酸液体系,并通过优化添加剂以改善性能。现场应用表明,对于A7生产井,采用重垢清洗剂将蜡质、胶质沥青质溶解,用氟硼酸处理剂对地层进行酸化处理,酸化后采液指数明显提高;对于B6注水井,采用氟硼酸处理剂和分流液相结合酸化处理,注水压力大幅下降,吸水指数增加明显。During the development process of A oilfield in Bohai Sea,the fluid production of production wells decreased obviously,the water injection pressure of water injection wells increased,and the difficulty of water injection was great.It was considered that the migration of sensitive minerals and mud in formation led to the blockage of pore-throat.In view of the above problems,the geological characteristics of this oilfield were studied,and the reasons for formation plugging were analyzed.On this basis,laboratory experiments were carried out to study a set of main acid system of fluoroboric acid,and the additives were optimized to improve performance through experiments.The field application showed that for A7 production well,heavy scale cleaning agent was used to dissolve wax and gelatinous asphaltine,and fluoroboric acid treating agent was used to acidify the formation,the index of recovered liquid after acidification was obviously increased.For B6 water injection well,using fluoroboric acid treatment agent and split liquid phase combined with acidification treatment,the water injection pressure decreased significantly,and the water absorption index increased significantly.

关 键 词：油田 氟硼酸酸液体系 酸化 采液指数 吸水指数 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]