The miscible behaviors and mechanism of CO2/CH4/C3H8/N2and crude oil in nanoslits: A molecular dynamics simulation study
The miscible behaviors and mechanism of CO2/CH4/C3H8/N2and crude oil in nanoslits: A molecular dynamics simulation study
复制标题
CO2/CH4/C3H8/N2与原油在纳米狭缝中的混溶行为及机理：分子动力学模拟研究
DOI：
10.1016/j.fuel.2021.121461
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发表时间：
2021
期刊：
影响因子：
7.4
通讯作者：
Xue Qingzhong
中科院分区：
文献类型：
--
作者：
Wang Ping;Li Xiaofang;Tao Zhengwu;Wang Sen;Fan Jiawei;Feng Qihong;Xue Qingzhong
采用分子动力学模拟方法，研究了不同气体（CO2、N2、CH4、C3H8）和不同原油在413 K和60 MPa条件下在纳米狭缝中的混相行为。研究了气相类型、极性和原油链长对气原油混相过程的影响。模拟结果表明，由于极性原油与二氧化硅表面的相互作用更强，CO2、CH4、c3h8和n2与极性原油的混相性比极性原油强。值得注意的是，极性原油在co2相中的溶解度高于在烃气相和n2相中的溶解度。此外，还发现原油链长会影响原油在烃类气体和氮气中的溶解。相反，它对原油与CO2的混相的影响可以忽略不计。模拟结果可为深部及超深部油藏开发提高采收率提供有价值的指导。
Using molecular dynamics simulations, we have investigated the miscible behaviors of different gas (CO2, N2, CH4, C3H8) and different crude oils in nanoslits at 413 K and 60 MPa. In this study, the effect of gas type, the polarity and the chain length of crude oil on the miscible process of gas and crude oil is explored. The simulation results show that CO2, CH4, C3H8and N2are more miscible with apolar crude oil than polar crude oil due to the stronger interaction between polar crude oil and silica surface. It is worth noting that the solubility of polar crude oil in CO2phase is higher than that in hydrocarbon gas phase and N2phase. In addition, it is found that the chain length of crude oil could affect the dissolution of crude oil in hydrocarbon gas and N2. In contrast, it has a negligible effect on the miscibility of crude oil and CO2. The simulation results could provide valuable guidance for enhancing oil recovery in the development of deep and ultra-deep reservoirs.