钻井液与完井液2025，Vol.42Issue(5)：617-622,6.DOI:10.12358/j.issn.1001-5620.2025.05.007
抗220℃淀粉基复合降滤失剂的研制与性能评价
Development and Performance Evaluation of a Starch-Based Composite Filter Loss Reducer for Use at 220℃
摘要
Abstract
Drilling fluid additives with both high temperature stability and environment protection ability are the key to"safe,efficient,economic and green"well drilling.A high temperature environmentally friendly starch-based composite filter loss reducer was developed with a water-soluble starch,a fine walnut shell powder and an environmentally friendly acrylic acid resin.The synthesis is completed through inverse emulsion polymerization with the help of a crosslinking agent.This composite filter loss reducer has a maximum thermal decomposition temperature of 286℃,and has fibrous structure of irregular shapes and different sizes.After hot rolling at 220℃,a 4%bentonite base slurry treated with 2%composite filter loss reducer has its API filter loss reduced from 39 mL to 12 mL,and its HTHP filter loss from 172 mL to 52 mL,a rate of filtration reduction of nearly 70%.At elevated temperatures,the composite filter loss reducer shows a low viscosity filter loss control effect.Zeta potential analysis,particle size distribution measurement and SEM observation show that the molecules of the composite filter loss reducer can be adsorbed on the clay particles,thereby enhancing the colloidal stability and optimizing the particle sizing of the bentonite slurry.Meanwhile,the composite filter loss reducer can plug the pores formed in the mud cakes,making the mud cakes thin and tough,and based on these mechanisms,the high temperature filtration rate of the drilling fluid is finally significantly reduced.The results of this study provide a guidance to the research and development of ultra-high temperature environmentally friendly water-based drilling fluids.关键词
水基钻井液/降滤失剂/抗高温/环境保护/天然改性处理剂Key words
Water-based drilling fluid/Filter loss reducer/High temperature resistance/Environment protection/Naturally modified additive分类
能源科技引用本文复制引用
赵杰,张羽臣,刘占奇,陈西国,王宝军,李新亮..抗220℃淀粉基复合降滤失剂的研制与性能评价[J].钻井液与完井液,2025,42(5):617-622,6.基金项目
中海石油(中国)有限公司科技项目"渤海油田稳产3000万吨,上产4000万吨关键技术研究"子课题"莱州湾浅层6000米大位移井钻完井技术研究与示范(CNOOC-KJ135ZDXM36TJ06TJGD202201)"部分研究成果. （中国）
