摘要
在注气提高采收率过程中,针对沥青沉降的问题,对原油进行多次接触实验,在混相压力和非混相压力下分别注入CO2,连续接触15～20次,以原油性质不再明显变化为准。观察是否有抽提现象,检测平衡油相组的变化,得到多次接触后平衡油相和平衡气相的变化规律,为CO2驱出现沥青质沉积提供依据。
During EOR by gas injection, with consideration of the asphalt deposition problems, the paper carries on multi-contact experiment of gas injection, and injects CO2 in miscibility pressure and non-miscibility pressure, contact continuously 15-20 times, taking the crude oil proportion no longer obvious change as the standard. Observe whether it has extraction, detect balance oil phase composition changes, and obtain evolution of balance oil phase and balance gas phase when contacting many times. It shall provide basis for the asphalt deposition in CO2 flooding.
出处
《重庆科技学院学报（自然科学版）》
CAS
2011年第3期58-60,共3页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
国家科技重大专项(2008ZX05013-02-02)
关键词
注气
多级接触
沥青沉积
混相压力
非混相压力
gas injection
multi-contact
asphalt deposition
miscibility pressure
non-miscibility pressure
