基于粘度法的凝胶反应动力学参数实验研究
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中国石油大港油田分公司采油工艺研究院

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TE357

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国家自然科学基金项目(面上项目,重点项目,重大项目),


Reaction kinetic parameters of gel measured by viscosity method
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    摘要:

    凝胶调驱数值模拟中通过化学反应平衡方程和反应动力学来描述凝胶的生成和降解过程,不同体系的反应动力学参数差别较大。针对高温交联聚合物凝胶耐温、抗盐、成胶强度和成胶时间调整范围宽的特性,基于粘度法基本理论,设计静态成胶实验,研究了聚合物和交联剂浓度分别对高温交联聚合物凝胶成胶过程和破胶过程的影响规律,并在实验结果的基础上,利用线性回归方法对反应速率常数和反应级数等表征高温交联聚合物凝胶体系成胶和破胶反应过程的关键参数进行了求解。结果表明,测得的反应速率常数和反应级数可准确反应凝胶的生成和降解机理,能够应用于矿场数值模拟中。

    Abstract:

    In most numerical simulators, chemical reaction equilibrium equation and reaction kinetics are used to describe the gelation and degradation of the gel. The reaction kinetic parameters of different systems are quite different. High temperature cross-linked polymer gel has the characteristics of temperature resistance, salt resistance, and wide adjustment range of gel forming strength and time. Based on its characteristics and the principle of viscosity method, static experiment on the influencing of polymer and cross-linker concentration on high temperature crosslinking polymer gel gelation and degradation was carried out respectively. Then, kinetic constant and reaction order to characterize the gelation and degradation of high temperature cross-linked polymer gel system were calculated with method of linear regression. The results show that the kinetic constant and reaction order can accurately reflect the gelation and degradation of gel, which can be applied to the field numerical simulation of gel treatment.

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  • 收稿日期:2020-10-19
  • 最后修改日期:2020-12-30
  • 录用日期:2021-03-29
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