基于ARGET ATRP原理控制就地聚合体系成胶时间  

Controlling the Gelation Time of the In-situ Polymerization System Based on the ARGET ATRP Principle

作　　者：邵明鲁 岳湘安[1] 贺杰[2] 李环 廖子涵 王励琪 SHAO Minglu;YUE Xiang’an;HE Jie;LI Huan;LIAO Zihan;WANG Liqi(State Key Laboratory of Petroleum Resources and Prospecting,Key Laboratory of Petroleum Engineering Ministry of Education,China University of Petroleum,Beijing 102249,P R of China;Key Laboratory of Applied Chemistry of Sichuan Province,College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,P R of China;College of Earth Sciences,University of Aberdeen King’s College,UK AB243FX,UK)

机构地区：[1]油气资源与探测国家重点实验室,石油工程教育部重点实验室,中国石油大学,北京102249 [2]西南石油大学化学化工学院,四川省油气田应用化学重点实验室,四川成都610500 [3]College of Earth Sciences,University of Aberdeen King’s College,UK AB243FX

出　　处：《油田化学》2020年第1期22-28,共7页Oilfield Chemistry

基　　金：国家科技重大专项“低渗-致密油藏高效提高采收率新技术”(项目编号2017ZX05009-004);国家科技重大专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(项目编号2016ZX05050012);国家自然科学基金青年科学基金项目“低渗油藏超分子凝胶调剖剂及其就地聚合成胶的控制机理”(项目编号51704250);国家自然科学基金重点项目“致密油储层提高采收率关键理论与方法研究”(项目编号51334007)。

摘　　要：针对传统自由基聚合引发方式在油藏中控制就地聚合成胶时间难以实现的问题,提出了以电子转移活化再生催化剂原子转移自由基聚合(ARGET ATRP)引发体系代替传统引发剂,优选了络合还原剂,考察了ARGET ATRP引发体系中引发剂1,2-二溴乙烷,催化剂三氯化铁,络合还原剂维生素C各组分加量对成胶时间的影响,采用优选的ARGET ATRP引发体系评价就地聚合调剖体系在岩心中的注入性和封堵性。研究结果表明,在80℃条件下,当1,2-二溴乙烷加量为0.35%数0.4%、引发剂加量为0.012%数0.02%、络合还原剂维生素C加量为0.18%数0.26%时,可调节各组分加量使就地聚合体系成胶时间大于24 h,成胶强度达I级;当矿化度低于7000 mg/L时,成胶时间随矿化度增大而延长,而凝胶强度由I级降至E级。岩心评价实验表明就地聚合体系具有良好的注入性,ARGET ATRP引发体系可以在岩心中引发聚合单体交联成胶,成胶后对岩心的整体封堵率达到77.71%。因此,基于ARGETATRP原理对就地聚合体系在油藏中的成胶时间调控具有可行性。In view of the problem that the traditional free radical polymerization initiation method is difficult to realize the reaction control of in-situ polymerization plugging system in the reservoir,an atom transfer radical(ARGET ATRP)initiation system was developed to replace the traditional initiator. The effects of the amount of each component including the initiator 1,2-dibromoethane,the catalyst ferric chloride,and the complex reducing agent vitamin C on the gelation time in the ARGET ATRP initiation system were investigated. The optimal ARGET ATRP initiation system was used to evaluate the injectability and plugging properties of the in-situ polymerization gel system in the core. Experiments showed that,under the condition of 80℃,when the dosage of 1,2-dibromoethane was 0.35%-0.4%,the dosage of ferric chloride was 0.012%-0.02%,and the dosage of vitamin C was 0.18%-0.26%,the dosage of each component could be adjusted to make the gelation time of the in-situ polymerization gel system greater than 24 h,and the gel strength reached I level. When the salinity was less than 7000 mg/L,the gelation time was prolonged with the increase of salinity,while the gel strength was reduced from I level to E level. The core evaluation experiment showed that the in-situ polymerization system had good injectivity. The ARGET ATRP initiation system could initiate the cross-linking of the polymerized monomers in the core,and the overall plugging rate of the core after the gelation reached up to77.71%. It is feasible to use the ARGET ATRP initiation system to control the gelling time of in-situ polymerization plugging system.

关 键 词：低渗油藏 深部调剖 就地聚合 成胶时间 ARGETATRP引发体系 

分 类 号：TE39[石油与天然气工程—油气田开发工程]