响应面分析法优化聚合离子缓凝剂合成及评价

Synthesis and Evaluation of Polymeric Ion Retarder Optimized by Response Surface Analysis Method

为解决长封固段固井上下水泥浆候凝时间不一致的矛盾,就需要设计特殊的大温差聚合物缓凝剂。采用响应面设计分析方法,建立多元二次回归方程,拟合聚合离子缓凝剂合成条件与响应值之间的函数关系,对聚合离子缓凝剂的合成条件进行优化。模型计算结果与实验数据吻合较好。由方差分析可知,一次项A(阳离子加量)、B(单体浓度)、C(引发剂加量)和D(反应温度)对响应值具有显著作用,二次项BC、A2、B2、C2、D2的影响也较为显著。获得的聚合离子缓凝剂的最佳合成工艺条件为:阳离子加量10%,单体加量31%,引发剂加量1.2%,反应温度66℃,稠化时间约为310min,为长封固段固井高温缓凝剂的广泛应用打下了良好的基础。

In order to solve the contradiction of different cement curing time of cement slurry at long ce-menting section up and down,special polymer retarder with large temperature difference should be designed.Response surface design and analysis method is used to establish multiple quadratic regression equation for fitting the functional relationship between synthesis conditions and response values of the polymeric ion re-tarder and optimizing the synthesis conditions of the polymeric ion retarder.The calculated results of the mod-el tally well with the experimental data.The analysis of variance shows that the primary term A(cationic addition),B(monomer concentration),C(initiator addition)and D(reaction temperature)have significant effects on the response value,and the secondary term BC,A2,B2,C2,D2 also have significant effects.The optimum synthetic conditions of the polymer ion retarder obtained by response surface analysis are:cationic addition is10%,monomer addition is 31%,initiator addition is 1.2%,reaction temperature is 66℃and thickening time is about 310 min,which lays a good foundation for wide application of high temperature retarderat long cementing section.