The gelation of emulsions is a notorious problem during the transportation of crude oil. In this study, the impact of dispersed water on the paraffin crystallization behavior in waxy crude oil was investigated using the mesoscopic dissipative particle dynamic method. The results indicated that water cuts affect the nucleation of wax crystals. The homogeneous nucleation of waxy crystals is important in systems when the water cuts are lower than the critical value (47.75 mol% of the studied systems), whereas heterogeneous nucleation becomes dominant when the water cuts are larger than the critical value. In addition, the water accelerates the nucleation and build-up of the crystal structure. Furthermore, the wax appearance temperature of the system experiences a steady increase when the water cut is lower than the critical value. The wax appearance temperature increases abruptly when the water cuts are larger than the critical value. This indicates that the injection of water further deteriorates the low-temperature rheological behavior of the emulsions. The critical water cut also impacts the competitive capture relationship between the water molecules and paraffin molecules.

乳液的凝胶化是原油运输过程中的一个臭名昭著的问题。本研究采用细观耗散粒子动力学方法研究了分散水对含蜡原油中石蜡结晶行为的影响。结果表明，含水量影响蜡晶体的成核。当含水率低于临界值（研究系统的 47.75 mol%）时，蜡状晶体的均匀成核在系统中很重要，而当含水率大于临界值时，非均相成核占主导地位。此外，水加速了晶体结构的成核和建立。此外，当含水率低于临界值时，系统的蜡出现温度会稳步上升。当含水量大于临界值时，蜡出现温度突然升高。这表明水的注入进一步恶化了乳液的低温流变行为。临界含水量也会影响水分子和石蜡分子之间的竞争捕获关系。