钻井液用超支化反相乳液聚合物的合成及其性能  

Property of Hyperbranched Polymer Synthesized Through Inverse Emulsion Polymerization

作　　者：王中华[1,2] 

机构地区：[1]中国石化中原石油勘探局 [2]中石化中原石油工程有限公司钻井工程技术研究院

出　　处：《钻井液与完井液》2014年第3期14-18,96,共5页Drilling Fluid & Completion Fluid

基　　金：国家科技重大专项"大型油气田及煤层气开发"课题二"高含硫气藏超深水平井钻完井技术"(2011ZX05017-002);中石化石油工程公司科技项目"页岩气水平井水基钻井液技术研究"(SG13-06K)部分研究内容

摘　　要：以丙烯酸、2-丙烯酰胺-2-甲基丙磺酸、丙烯酰胺为原料,采用氧化还原引发剂体系,在RAFT试剂存在下,通过反相乳液聚合制备了超支化P（AA-AM-AMPS）反相乳液聚合物.研究了引发剂比例及用量、油水体积比、乳化剂的HLB值及其用量等因素对共聚物的水溶液表观黏度及所处理钻井液的流变性和滤失量的影响.结果表明,当引发剂过硫酸铵/亚硫酸氢钠=1∶1,引发剂用量为0.16％～0.2％,油水体积比为0.875～1.0,复合乳化剂HLB值为6.9～7.1,复合乳化剂用量为7.6％～8.5％时,制得反相乳液聚合物的水溶液表观黏度为66～71 mPa·s,该超支化P（AA-AM-AMPS）反相乳液聚合物在淡水、盐水、饱和盐水和复合盐水基浆中具有较好的增黏、降滤失能力,抗温、抗盐能力强,同时具有较强的润滑能力,在淡水基浆中加量为1％时润滑系数降低率为68.3％.A hyperbranched polymer P(AA-AM-AMPS) was synthesized through inverse emulsion polymerization, using acrylic acid, 2-acrylamide-2-methyl propane-sulfonic acid and acrylamide as raw materials, redox initiator, and RAFT reagent. The concentration of initiator, oil/water volume ratio, the HLB value and concentration of emulsifier are studied for their effect on the apparent viscosity of the water solutions of the synthesized copolymer, and on the rheology and filtration property of drilling fluids treated with the copolymer. Laboratory test shows that the synthesized copolymer has an apparent viscosity of 66-71 mPa·s in water under these synthesis condition: Ratio of initiators Ammonium persulfate : Sodium bisulfite = 1∶1, concentration of initiator 0.16%-0.2%, Volume ratio of oil to water 0.875-1.0, HLB value of complex emulsifier 6.9-7.1, complex emulsifier at concentration of 7.6%-8.5%. The synthesized copolymer can effectively viscosify and reduce the filtration rate of fresh water, saltwater and saturated saltwater base muds. The copolymer has high temperature stability and also render drilling fluid good lubricity. Friction coefficient of drilling fluid is reduced by 68.3% at a 1% of the copolymer treatment.

关 键 词：钻井液 超支化聚合物 反相乳液聚合 降滤失剂 增黏剂 

分 类 号：TE254.3[石油与天然气工程—油气井工程]