The miscible behaviors of C10H22(C7H17N)/C3H8 system: Insights from molecular dynamics simulations
The miscible behaviors of C10H22(C7H17N)/C3H8 system: Insights from molecular dynamics simulations
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DOI：
10.1016/j.fuel.2020.118445
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发表时间：
2020-11
期刊：
影响因子：
7.4
通讯作者：
Xiaofang Li;Sen Wang;Q. Feng;Q. Xue
中科院分区：
文献类型：
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作者：
Xiaofang Li;Sen Wang;Q. Feng;Q. Xue
烃类、天然气和原油的混相机理对深层油藏提高采收率具有重要作用。首次用分子动力学模拟方法研究了高温高压下C10H22(C7H17N)/C3H8体系在硅孔模型中的相容行为。模拟结果表明，VDW在油相和气相之间的相互作用是其混相过程的主要驱动力。值得注意的是，在一定温度下，C10H22/C3H8体系存在一个最佳混相压力。此外，我们的研究表明，与极性油相比，烃类气体驱对非极性原油更有效，这是因为硅胶表面与极性油之间的相互作用更强。该研究可加速烃类气驱在深层油藏中的应用。
The underlying miscible mechanism of hydrocarbon gas and crude oil acts a significant role for enhanced oil recovery in deep reservoirs. For the first time, molecular dynamics simulations are performed to characterize the miscible behaviors of C10H22(C7H17N)/C3H8system in silica pore model at high temperature and pressure. The simulation results show that vdW interactions between oil phase and gas phase are the main driving force for their miscible process. Notably, there exists an optimum miscibility pressure for C10H22/C3H8system under a certain temperature. Furthermore, our investigations indicate that hydrocarbon gas flooding is more effective for apolar crude oils compared with polar oil due to the stronger interactions between silica surface and polar oil. This investigation could accelerate the application of hydrocarbon gas flooding in deep reservoirs.