非凝析气在原油及其孔隙中溶解的分子模拟  

Molecular Simulation of Dissolution of Non-condensate Gas in Oil and Oil Pores

作　　者：何海峰 贺文媛 盖平原 梁伟[2,3] 郭省学 顾泽凯[4] 巩亮 HE Haifeng;HE Wenyuan;GAI Pingyaun;LIANG Wei;GUO Shengxue;GU Zekai;GONG Liang(Gudong Oil Production Plant,Sinopec Shengli Oilfield Company,Dongying 257000,China;Research Institute of Petroleum Engineering and Technology,Sinopec Shengli Oilfield Company,Dongying 257000,China;Shandong Key Laboratory of Heavy Oil Production Technology,Dongying 257000,China;College of New Energy,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石化胜利油田孤东采油厂,东营257000 [2]中国石化胜利油田石油工程技术研究院,东营257000 [3]山东省稠油开采技术重点实验室,东营257000 [4]中国石油大学(华东)新能源学院,青岛266580

出　　处：《工程热物理学报》2024年第8期2414-2422,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金联合基金项目(No.U20B6003)。

摘　　要：随着石油的不断开采,轻质原油储量不断减少,分子量及黏度较大的原油逐渐成为开采的主要对象。本文构建了不同原油孔隙(C6、原油),采用分子动力学方法,探究了非凝析气体(N_(2)、CO_(2)及混合气体)在原油及其孔隙中的溶解微观过程,揭示了非凝析气体在不同原油及其孔隙中的溶解机理,并探究了温度压力的影响。结果表明,大分子沥青质、胶质对气体的溶解具有明显抑制,CO_(2)和N_(2)气体对稠油中轻组分存在萃取作用。同时CO_(2)在原油孔隙中的溶解能力、对壁面处原油的剥离能力强于N_(2),N_(2)易在孔隙中部形成气体通道。另外,提升温度和压力均能提升气体对原油溶胀及孔隙中原油推动效果。With the continuous exploitation of oil,the reserves of light crude oil are decreasing,and the crude oil with high molecular weight and viscosity has become the main object of exploitation.In this paper,different crude oil,such as C6 and mixed heavy oil,are constructed,and the molecular dynamics method is used to explore the microscopic process of dissolution of non-condensable gases(N_(2),CO_(2) and mixed gas)in crude oil pores.The dissolution mechanism of non-condensate gases in different crude oil and nanoscale pores is revealed,and the effect of temperature and pressure is explored.The results demonstrate that with the addition of macromolecular asphaltene and resin,the dissolution process of gas is inhibited,and the light components of heavy oil could be extracted by gas.The solubility of CO_(2) in crude oil and the peeling ability of crude oil on the wall are stronger than that of N_(2).And N_(2) forms a gas channel in the middle of the pore.In addition,increasing temperature and pressure can improve the effect of gas on crude oil swelling and crude oil propulsion in pores.

关 键 词：非凝析气 原油孔隙 分子动力学模拟 溶解 

分 类 号：TK121[动力工程及工程热物理—工程热物理]