KH570-AM-淀粉接枝共聚物降滤失剂的制备及其性能  

Preparation and properties of KH570-AM-starch graft copolymer as filtrate reducing agents

作　　者：王爱荣 石海信 童张法[1] 王梓民 王伟建 WANG Airong;SHI Haixin;TONG Zhangfa;WANG Zimin;WANG Weijian(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,Guangxi,China;Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization,Qinzhou 535011,Guangxi,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西高校北部湾石油天然气资源有效利用重点实验室,广西钦州535011

出　　处：《化工进展》2018年第10期4022-4028,共7页Chemical Industry and Engineering Progress

基　　金：广西高校高水平创新团队及卓越学者计划(桂教人[2016]42号);广西自然科学基金(2016GXNSFCA380011);广西中青年教师基础能力提升项目(2017KY0802)

摘　　要：以木薯淀粉(CSt)为原料,丙烯酰胺(AM)、γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)为单体,过硫酸铵和亚硫酸氢钠按质量比为1∶1构成氧化-还原引发体系,采用水相法合成淀粉-KH570-AM接枝共聚物降滤失剂(CSt-KH570-AM),探索了制备条件及其在钻井液中的应用。适宜的制备条件是:总反应物溶液质量分数为20%,m(AM)/m(CSt)=2,KH570与引发剂质量分数分别为30%和1%,溶液pH=4,反应时间3h,温度50℃。FTIR证明AM与KH570均已成功接枝到淀粉分子上;TGA-DSC及Frontier-TGA联用分析表明,CSt-KH570-AM在245℃之前热稳定性良好;XRD证明CSt-KH570-AM属非晶结构。在降滤失性能评价中,将CSt-KH570-AM与CSt-AM(质量分数分别为2.5%与1.5%)复配添加到淡水基浆中可抗温至180℃,在140℃的NaCl盐水基浆中可抗盐至饱和。Using the cassava starch(CSt)as raw material,the acrylamide(AM)and theγ-methacryloxypropyl trimethoxysilane(KH570)as monomer,the ammonium persulfate and sodium bisulphite formed an redox initiation system with a mass ratio 1∶1.The cassava starch-graft-AM-KH570 copolymers(CSt-KH570-AM)were prepared by aqueous solution polymerization.Preparation conditions of CSt-KH570-AM and its filtration control properties in the drilling fluid were studied.The optimal reaction conditions were that:the mass fraction of total reactants aqueous solution was 20%,the ratio of m(AM)to m(CSt)was 2,the KH570 and the initiator mass fractions were 30%and 1%,respectively,the solution pH was 4,the reaction time was 3h,and the temperature was 50℃.The FTIR showed that both AM and KH570 had been successfully grafted onto starch molecules.TGA-DSC and Frontier-TGA analysis showed that thermal stability of CSt-KH570-AM was good until the temperature reached 245℃.The XRD showed that CSt-KH570-AM was amorphous.In the evaluation of fluid loss performance,CSt-KH570-AM and CSt-AM(mass fractions of 2.5%and 1.5%,respectively)were compounded and added to the freshwater slurry to resist temperatures up to 180℃,and it could be used in NaCl saturated drilling fluid at 140℃.

关 键 词：木薯淀粉 聚合 制备 降滤失剂 性能评价 

分 类 号：TE254[石油与天然气工程—油气井工程]