钻井液与完井液2024，Vol.41Issue(3)：318-324,7.DOI:10.12358/j.issn.1001-5620.2024.03.005
一种抗超高温配位键合型低聚物降黏剂
An Ultra-High Temperature Coordinate Bond Oligomer Thinner
摘要
Abstract
An ultra-high temperature coordinate bonding oligomer thinner AA-AMPS-TA(named PAAT)is synthesized as a way of dealing with the problems encountered in using high density water-based drilling fluids at elevated temperatures.These problems involve high filtration rate,high ECD and internal friction,poor mobility or even complete loss of the mobility of the drilling fluids.The thinner PAAT is synthesized through radical polymerization by introducing the molecules of tanning acids(TA)which are rich in catechol groups into the poly organic acid thinner AA-AMPS.The optimal synthesis condition of the thinner PAAT is determined through orthogonal experiment,and the thinning performance of the thinner is evaluated.The evaluation results show that after introducing TA into the molecules of the AA-AMPS,the IR spectrum of the product PAAT shows an intra-molecule hydrogen bond absorption peak,and the thermal stability of the PAAT molecules is greatly improved because of the introduction of large number of phenol groups;the decomposition temperature of the PAAT molecules is close to 500℃.PAAT has the ability to reduce the viscosity of low-concentration bentonite slurry and high clay concentration slurry such as one formulated with 7% bentonite and 8% kaolinite.Using PAAT,the viscosity of a high density water-based drilling fluid can be reduced by 26.5%,and after hot-rolling the water-based drilling fluid at 240℃,its viscosity can be reduced by 44.4% .The PAAT thinner reduces viscosity by molecule adsorption,as is verified by Zeta-potential measurement and particle size analysis.This thinner has been used in drilling the well Pengshen-101,and the viscosity and gel strengths of the drilling fluid were both satisfactorily under control at elevated temperatures.关键词
超高温/水基钻井液/聚合物降黏剂/配位键合Key words
Ultra-high temperature/Water-based drilling fluid/Polymer thinner/Coordinate bonding分类
能源科技引用本文复制引用
贺垠博,梁浩,敬玉娟,杜明亮,李小庆..一种抗超高温配位键合型低聚物降黏剂[J].钻井液与完井液,2024,41(3):318-324,7.基金项目
国家自然科学基金青年科学基金项目"智能钻井液聚合物处理剂刺激响应机理与分子结构设计方法研究"(52004297) （52004297）
中国石油集团川庆钻探工程有限公司部级科研项目"抗200℃高密度水基钻井液体系研发"(CQ2022B-18-1-3). （CQ2022B-18-1-3）
