A new two-dimensional dynamic model was developed to simulate asphaltene precipitation, aggregation, and deposition at isothermal and non-isothermal conditions. The perturbed-chain statistical associating fluid theory equation of state was used to model the asphaltene precipitation. Also, novel kinetic models were used to account for the aggregation and deposition of asphaltene particles. The effect of the aggregate size on the rate of aggregation and deposition was studied, and it was concluded that the rate of asphaltene deposition increases, while the concentration of nanoaggregates increases in the well column. The tendency of smaller aggregates to deposit on the surface could be explained as a result of the increase in the diffusion coefficient of asphaltene aggregates. The results obtained from the new model for the rate and amount of asphaltene deposition were compared to the experimental data reported in the literature. It was shown that the results of the new simulation were in good agreement with the experimental data.

中文翻译：

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用于模拟井筒和管道中沥青质沉积的二维颗粒模型

开发了一个新的二维动力学模型来模拟沥青在等温和非等温条件下的沉淀，聚集和沉积。用扰动链统计缔合流体状态理论方程对沥青质的沉淀进行建模。同样，新的动力学模型被用来解释沥青质颗粒的聚集和沉积。研究了聚集体尺寸对聚集和沉积速率的影响，并得出结论，在井柱中，沥青质沉积速率增加，而纳米聚集体的浓度增加。由于沥青质骨料的扩散系数增加，可以解释较小的骨料沉积在表面上的趋势。从新模型中获得的沥青质沉积速率和数量的结果与文献中报道的实验数据进行了比较。结果表明，新的模拟结果与实验数据吻合良好。