Abstract

In this study, the viscosity method to determine the phase inversion point of the emulsion was optimized, so as to obtain a simpler and more convenient method to determine the phase inversion point with the same accuracy as the viscosity method. Firstly, emulsification experiments were carried out on seven types of crude and the corresponding formation water using the stirring method, and the viscosity of emulsion was measured. Then, the new method proposed in this work and two models proposed by predecessors for predicting phase inversion point were compared with the viscosity method. The results show that the phase inversion point obtained by the new method was consistent with the measurement result of the viscosity method, and the calculation results of the other two models have some errors with the viscosity method. Therefore, the advantage of the optimization method is not only the predictions are same as the viscosity method, but more importantly, it omits the complicated steps of measuring the viscosity of emulsions as well as avoids the trouble of inaccurate measurement when the emulsion’s viscosity is too large or too small, and improves the judgment accuracy of the phase inversion point of emulsion to a certain extent.

摘要

在这项研究中，优化了用于确定乳液相变点的粘度方法，从而获得了一种更简单，更方便的方法来确定相变点，其准确度与粘度法相同。首先，采用搅拌法对七种原油及相应的地层水进行了乳化实验，并测定了乳化液的粘度。然后，将本文提出的新方法和前人提出的两个预测相变点的模型与粘度方法进行了比较。结果表明，新方法得到的相变点与粘度法的测量结果一致，另外两种模型的计算结果与粘度法有一定误差。因此，