气体在原油中扩散系数影响因素研究进展

Proceedings of Influencing Factors of Gas Diffusion Coefficient in Crude Oil

王志兴 侯吉瑞 李 妍 李 卉 朱贵良

WANG Zhixing HOU Jirui LI Yan LI Hui ZHU Guiliang

气体扩散系数是分析注气提高采收率机理的重要参数之一。为明确常见注入气在原油中扩散系数的主要 影响参数及相关作用机理，调研了近年常规注气介质（CO2、N2及轻烃）在地层原油中扩散系数研究的最新进展。 通过分析不同实验方法测量的注入气-地层原油的扩散系数数据，总结了气体类型、原油组成、温度、压力等因素 对注入气体扩散系数的影响规律；结合不同因素对扩散系数的影响规律，阐述了高温高压油藏条件下原油对注 入气体介质扩散系数影响因素的作用机理；指出了注入气在复杂油藏条件下扩散系数的研究方向。图2表3参46

Diffusion coefficient was one of the prime parameters to study the gas EOR mechanism. In order to understand the influencing factors and the corresponding mechanism of gas diffusion coefficient in crude oil，the recent researches about diffusion coefficient of conventional gas such as CO2，N2 and light hydrocarbons in crude oil were summarized. Through different reports on experimental methods for determining the gas diffusion coefficient in crude oil，the influences of gas type，oil composition，and diffusion conditions like temperature，pressure and other factors on gas diffusion coefficient were discussed. Subsequently，primary influence rules of these factors were described，and relevant functioning mechanisms of these factors on gas diffusion in crude oil under high temperature and high pressure conditions were briefly presented. The research directions of gas diffusion coefficient on complicated reservoir conditions were proposed

10.19346/j.cnki.1000-4092.2019.03.032