抗高温环保型降滤失剂低聚糖接枝物的合成与应用  

The Synthesis and Application of an Environmentally Friendly High Temperature Graft Oligosaccharide Filter Loss Reducer

作　　者：郑斌 ZHENG Bin(Drilling Fluid Company,Great Wall Drilling Engineering Corporation Limited of CNPC,Panjin,Liaoning 124011)

机构地区：[1]中国石油集团长城钻探工程有限公司钻井液公司,辽宁盘锦124011

出　　处：《钻井液与完井液》2023年第3期313-318,共6页Drilling Fluid & Completion Fluid

基　　金：中国石油集团公司科研项目“高端井筒工作液新材料新技术与装备研究”(2021DJ4404);中国石油集团长城钻探工程有限公司科技项目“环保型水基钻井液体系研究与试验”(GWDC 202201-15(02))。

摘　　要：以淀粉衍生物低聚糖为原料,丙烯酰胺、2-丙烯酰胺-2-甲基丙磺酸和N-乙烯基吡咯烷酮为接枝单体,AIBN为引发剂,利用反相乳液法聚合得到低聚糖接枝物降滤失剂CG-FL。通过FTIR、扫描电镜、热失重分析等手段表征了接枝物结构,检测了低聚糖接枝物的生物毒性EC50、生物降解率及重金属离子含量,通过单剂对比测试、实验室配制环保钻井液对比测试及现场井浆性能测试,评价了低聚糖接枝物的钻井液性能。室内评价结果表明,低聚糖接枝物降滤失剂CG-FL抗温超过180℃,抗盐达15%,分散性和配伍性较好,性能优于对比产品。现场试验应用证明,加入CG-FL后能够降低钻井液滤失量,现场钻井液性能稳定,无起泡或者处理剂碳化现象发生。A graft oligosaccharide filter loss reducer CG-FL was developed through inverse emulsion with starch derivative oligosaccharide as the raw material,acrylamide,2-acrylamide-2-methapropyl sulfonic acid and N-vinyl pyrrolidone as the graft monomers and AIBN as the initiator.The molecular structure of the filter loss reducer CG-FL was characterized by FTIR,SEM and TGA etc.The biotoxicity EC50,biodegradation capacity and heavy metal contents of CG-FL were examined.The performance of CG-FL in drilling fluids was evaluated by performance comparison of single additive,performance comparison of different drilling fluids formulated in laboratory with CG-FL and other additives,as well as field application.Laboratory evaluation of CG-FL showed that CG-FL functions normally at temperatures up to 180℃,it is resistant to contamination by 15%salt.CG-FL has good dispersibility and compatibility with other additives.In comparison experiment,CG-FL showed better properties than the counter additives.Field application showed that CG-FL reduced the filtration rate of the drilling fluids,and the drilling fluids,after treatment,showed stable properties,no foaming or carbonization of the additive has occurred.

关 键 词：降滤失剂 抗高温钻井液 接枝物 低聚糖 反相乳液聚合 

分 类 号：TE254.4[石油与天然气工程—油气井工程]