响应面法优化中高温低浓度香豆胶压裂液体系

发布时间：2018-05-30 06:17

  本文选题：响应面法 + 中心复合设计　； 参考：《油田化学》2017年01期

【摘要】：为减小压裂液对储层的伤害,降低压裂液体系中香豆胶的浓度,避免传统方法(多因素排列组合实验方法)工作强度大,精确度低的问题,采用中心复合设计(CCD),以香豆胶浓度、有机硼交联剂浓度、温度为考察指标,对实验获得的数据进行多元线性回归,同时用建立的回归模型优化压裂液配方,选取较低浓度的香豆胶压裂液体系并通过高温下的黏度测试进行验证。结果表明,通过构建的拟合方程可以预测给定香豆胶压裂液体系低浓度配方下的冻胶黏度;拟合方程中3种因素对冻胶黏度的影响显著性顺序为:香豆胶浓度温度交联剂浓度;基于CCD方法得出80~120℃下的优化配方,香豆胶加量为0.175%~0.35%、交联剂加量为0.37%~0.73%时,经1000 s~(-1)高速剪切2 min和170 s~(-1)剪切95 min后的冻胶黏度约为52~154 mPa·s。该方法预测性良好,优化出的低浓度香豆胶体系具有良好的耐温耐剪切性能。
[Abstract]:In order to reduce the damage of fracturing fluid to reservoir, reduce the concentration of coumarin in fracturing fluid system, and avoid the problems of large working intensity and low precision in traditional method (multi-factor arrangement and combination experiment method), the central composite design was used to design CCDT and the concentration of coumarin was used. The concentration and temperature of organic boron crosslinking agent were used as the index of investigation, and the data obtained from the experiment were regressed by multivariate linear regression, and the formula of fracturing fluid was optimized by using the established regression model. The fracturing fluid system with lower concentration was selected and verified by viscosity test at high temperature. The results show that the gel viscosity can be predicted by the established fitting equation, and the influence of three factors on gel viscosity is in the order of temperature crosslinking agent concentration. Based on the CCD method, the optimized formula was obtained at 80 鈩，

本文编号：1954247