海上稠油油田聚合物驱受效井复合解堵剂的优选与应用  

Optimization and Application of Composite Plug-removing Agents for Polymer Flooding Effective Wells in Offshore Heavy Oilfields

作　　者：张洪菁 顾津龙 崔波[1] 丁文刚[1] 吴广 ZHANG Hong-jing;GU Jin-long;CUI Bo;DING Wen-gang;WU Guang(China Oilfield Services Limited,Tianjin 300459,China;CNOOC Energy Technology&Services Limited,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司,天津300459 [2]中海油能源发展股份有限公司工程技术分公司,天津300459

出　　处：《化工管理》2021年第10期85-86,共2页Chemical Engineering Management

摘　　要：针对渤海油田W区块聚合物驱受效井堵塞严重影响产能这一情况,从解聚性能、腐蚀性能、溶垢性能、溶蜡溶沥青性能等方面开展了复合解堵剂的研制和性能评价,确定了配方为6%解聚剂PA-PB+1%缓蚀剂PA-CI+5%有机解堵剂PA-OS+20%螯合解堵剂PA-NC的复合解堵剂。在60℃,1.5 h条件下,对碳酸钙溶蚀率为90.5%;在60℃,24 h条件下,对膨润土、伊利石、绿泥石、蒙脱石、高岭石溶蚀率分别为:33.0%、20.1%、45.0%、31.2%、26.1%;对现场复合垢样的降解率超过90%,现场采用“单步法”的注入工艺,解堵后流压增长1.43~7.28 MPa,产油量增幅1.47~1.94倍,获得了显著的增产效果。In view of the fact that the blockage of the effective wells of polymer flooding in block W of Bohai oilfield seriously affects productivity,the development and development of composite plug-removing agents have been carried out from the aspects of depolymerization performance,corrosion performance,scale dissolving performance,wax dissolving and asphalt dissolving performance,etc.Performance evaluation determined that the formula is 6%depolymerization agent PA-PB+1%corrosion inhibitor PA-CI+5%organic blocking agent PA-OS+20%chelating plugging agent PA-NC.At 60℃,1.5 h,The dissolution rate of calcium carbonate is 90.5%;at 60℃,24 h,the dissolution rate of bentonite,illite,chlorite,montmorillonite,and kaolin are 33.0%,20.1%,45.0%,31.2%,26.1%.The degradation rate of onsite composite scale samples exceeds 90%.The“single-step”injection process is used on site.After the plugging is removed,the flow pressure increases by 1.43~7.28 MPa and the oil production increases by 1.47~1.94 times.Significant yield increase is obtained.

关 键 词：现场应用 聚合物驱 复合解堵剂 单步法 

分 类 号：TE25[石油与天然气工程—油气井工程]