耐高温钻井液降黏剂St/AMPS/AA的研制  

Research on High Temperature Drilling Fluid Thinner St/AMPS/AA

作　　者：刘立新[1] 杜俊涛[1] 刘顺平[1] 陈娟娟[1] 史卜建[2] 赵晓非[1] 

机构地区：[1]东北石油大学化学化工学院.石油与天然气化工省重点实验室 [2]中国石化青岛炼油化工有限责任公司

出　　处：《钻井液与完井液》2012年第2期18-20,90,共3页Drilling Fluid & Completion Fluid

基　　金：黑龙江省自然科学基金项目(B200912)

摘　　要：以苯乙烯与2-丙烯酰胺基-2-甲基丙磺酸和丙烯酸为原料,DMF(N,N-二甲基甲酰胺)为溶剂,引发剂BPO(过氧化苯甲酰)用量为1.0%,溶液共聚温度为85℃,反应时间为4 h,合成了St/AMPS/AA共聚物钻井液降黏剂。室内实验表明,加入0.5%该共聚物后,淡水钻井液在常温下的表观黏度由28.8 mPa.s降至23.4mPa.s,降黏率为58.3%;在260℃老化16 h后表观黏度由37.1 mPa.s降至6.8 mPa.s,降黏率为76.8%,该剂用作抗高温降黏剂在淡水钻井液中具有良好的耐温性和降黏效果。In this papmer, a drilling fluid thinner copolymer St/AMPS/AA is developed by styrene, 2-acrylamido-2-methyl-propane sulfonic acid and acrylic acid, which are reacted in solution of DMF at the presence of 1.0% BPO at 85 ℃ for 4 hours.The experimental results show that when the content of the thinner is 0.5% in fresh water base mud, its apparent viscosity can be decreased from 28.8 mPa ·s to 23.4 mPa·s, the viscosity reducing ratio is 58.3% at room temperature, and after rolled for 16 hours at 260 ℃, the apparent viscosity from can be decreased from 37.1 mPa ·s to 6.8 mPa ·s with the viscosity reducing ratio 76.8%.

关 键 词：降黏剂 St/AMPS/AA三元共聚物 抗高温钻井液 钻井液添加剂 

分 类 号：TE254.4[石油与天然气工程—油气井工程]