ABSTRACT Oil wells contain two-phase liquid and gas mixtures driven upwards due to a pressure gradient. In this paper, we study a two-fluid model for vertical upwelling flow and explicitly account for the exsolution of the dissolved gas as the pressure decreases along the well. We find that the application of Henry's law for the dissolved gas concentration predicts a rapid transition to a foam, which runs counter to intuition. In order to study ways in which this rapid transition could be avoided, we examine rate limiting non-equilibrium dynamics by incorporating nucleation and bubble growth dynamics in the two-phase model.

中文翻译：

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解决油井中的两相流

摘要油井包含由于压力梯度向上驱动的两相液体和气体混合物。在本文中，我们研究了垂直上升流的双流体模型，并明确说明了随着压力沿井下降时溶解气体的出溶。我们发现，对溶解气体浓度应用亨利定律预测了向泡沫的快速转变，这与直觉背道而驰。为了研究可以避免这种快速转变的方法，我们通过在两相模型中结合成核和气泡生长动力学来检查限速非平衡动力学。