摘要
室内研究和现场应用表明,聚乙烯醇类防塌剂表现出较明显的增粘负效应,可引起钻井液粘度的急剧增加,严重影响其推广应用。通过金属盐催化降解和阳离子化反应,研制出了抑制性好且增粘负效应低的阳离子化改性多元醇防塌剂。考察了阳离子化试剂、反应温度、反应时间对取代度、反应效率和产品主要性能的影响,得出了阳离子化多元醇防塌剂最佳制备条件,即:PVA与阳离子化试剂物质的量比为1∶1,反应温度为50℃,反应时间为4 h,阳离子度可达0.435。
It can be seen from laboratory study and field practice that Polyvinyl alcohol anti-sloughing agent can increase the viscosity of drilling fluids sharply as a result of significant viscosifying negative effect and thus its application and dissemination is limited seriously.The modified positive polyglycols anti-sloughing agent was developed by cationic reaction and metal salt catalytic degradation and it presented favorable inhibition and slight viscosifying negative effect.The effects of cationic reagent and reaction temperature and time on degree of substitution,reaction efficiency and main performance of the reactant were examined and the optimum reaction conditions of positive polyglycols anti-sloughing agent were also determined,i.e.the mole ratio of PVA and cationic reagent is 1∶1,reaction temperature and time is 50 ℃ and 4 h respectively.The degree of substitution can reach 0.435.
出处
《钻井液与完井液》
CAS
北大核心
2006年第3期1-3,共3页
Drilling Fluid & Completion Fluid
基金
"十五"科技攻关项目"新型完井液研究"(编号:2002BA312B-01)
关键词
钻井液添加剂
防塌剂
多元醇
降解
阳离子化
取代度
抑制性
drilling fluid additive,anti-sloughing agent,polyglycols,degradation,cationic,degree of substitution,inhibition
