摘要
目前气体-原油分子扩散系数的研究对象多为单组分气体-原油体系,而且多在低温或者低压下在PVT筒中进行实验,与实际的注气过程相差较大。在这种情况下,研究了多孔介质中高温高压下多组分气体-原油的扩散系数,测试了全直径岩心中多组分气体-凝析油、多组分气体-重质原油在60℃,20MPa条件下的扩散系数。研究结果表明:原油组分对扩散有一定影响,但对于最终扩散程度影响不大;气体在凝析油中的扩散系数高于其在重质原油中的扩散系数;扩散系数以幂函数形式逐渐增加,最终逐渐趋于平缓。
The study of molecular diffusion coefficient for gas-oil system focuses mostly on the single gas-oil system,and the diffusion coefficient is measured in the PVT tube under low pressure or low temperature.Under the circumstances,this paper tested the effective diffusion coefficient between the gas injected and oil in porous media under high temperature and pressure,and also tested the diffusion coefficient of gas-condensate oil system and gas-heavy crude oil system in the full diameter core under 60 ℃ and 20 MPa respectively.The results show that the components of crude oil have a little influence on the diffusion coefficient.The gas diffusion coefficient in condensate oil is higher than that in heavy oil.The diffusion coefficient follows a power function and increases with the increasing of time,and the curve flattens gradually finally.
出处
《岩性油气藏》
CSCD
2012年第5期111-115,共5页
Lithologic Reservoirs
基金
国家自然科学基金项目"多孔介质中CO2-多组分原油非平衡扩散理论研究"(编号:21143011)
高校博士点基金项目"高温高压多组分凝析气非平衡相态理论模型研究"(编号:20115121110002)联合资助
关键词
高温高压
多孔介质
扩散系数
凝析油
重质原油
high temperature and high pressure
porous media
diffusion coefficient
condensate oil
heavy crude oil
作者简介
叶安平（1984-），男，西南石油大学在读博士研究生，研究方向为油气渗流理论。地址：（610500）四川省成都市新都区西南石油大学石油T程学院。E—mail：156830216@qq.com
