低碳烃无水压裂液交联流变动力学研究

Crosslinking Rheo-Kinetics for Low Carbon Hydrocarbon-Based Fracturing Fluid Systems

侯向前 卢拥军 方波 邱晓惠 王进爽 翟 文

HOU Xiang-Qian LU Yong-Jun FANG Bo QIU Xiao-Hui WANG Jin-Shuang ZHAI Wen

本文以双烷基磷酸酯作为胶凝剂，络合铁作为交联剂，对煤油基压裂液和柴油基压裂液交联过程流变学进行了研究，并建立了交联过程流变动力学模型分别表征煤油基压裂液和柴油基压裂液的交联过程。结果表明，可分别用二级和三级交联流变动力学模型描述煤油基压裂液和柴油基压裂液的交联过程，模拟值与实验值吻合良好，模型参数具有明确的物理意义；模型的结构变化速率常数k随着胶凝剂浓度的提高而减小，最大弹性模量G′max随着胶凝剂浓度的提高而增大。图12表2参20

In this paper, the crosslinking process of kerosene-based and diesel-based fracturing fluids was studied with dialkyl phosphate ester as gelling agent and complex iron as crosslinking agent, and the rheological dynamics models, which were respectively suitable to describe the crosslinking process of kerosene-based and diesel-based fracturing fluids, were established. The results showed that the second-order and third-order rheological dynamics equations could be applied to describe the crosslinking process of kerosene-based and diesel-based fracturing fluids, respectively, the calculated values were in good agreement with the experimental data, and the meanings of the model parameters were reasonable. With the increase of the concentration of the gelling agent, the structure change rate constant (k) decreased and the maximal elastic modulus (G′max) increased.