胺基聚醚含量测定干扰因素分析及消除

胺基聚醚作为一种高效抑制剂在钻井液中使用越来越多，但对其在钻井液中的游离含量却无法进行检测，导致配制维护钻井液时确定加量没有依据。研究了胺基聚醚含量测定方法，考察发现钻井液常用处理剂如氢氧化钠、羧甲基纤维素钠盐、磺化酚醛树脂、水解聚丙烯酰胺钾盐等使测定结果高出理论值，研究了干扰因素消除方法。在钻井液中进行验证，测定结果表明，该方法偏差不大于10%，能够较好地满足现场应用。 

Factors Affecting Measurement of Polyether Amine Content and Elimination Thereof

Polyether amine is a highly effective shale inhibitor which are more and more widely used in drilling fluids. Since there are no methods of determining the free content of the polyether amine in a drilling fluid, there is no basis for determining the amount of polyether amine when maintaining the properties of the drilling fluid. In laboratory studies, the methods of determining the content of polyether amine in drilling fluids were investigated. It was found that the common drilling fluid additives, such as caustic soda, sodium carboxy methyl cellulose, sulfonated methyl phenolic resin and potassium salts of hydrolyzed polyacrylamide make the measurement results higher than the theoretical value. A method was found able to eliminate the factors interfering the determination of the polyether amine concentration. In verifying the new method in laboratory experiment, it was found that it gave results with errors ≤10%, satisfying the needs of field application.