TITLE:
Optimization of Injection Parameters for Profile Control and Flooding in an Oilfield during High Water Cut Period
AUTHORS:
Meinan Wang, Hui Cai, Xiaoqi Chen, Junting Zhang, Yue Xie
KEYWORDS:
High Water Cut Period, Profile Control, Injection Rate, Injection Timing, Injection Volume
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.11 No.11,
November
24,
2023
ABSTRACT: In order to improve the effect of water control and oil stabilization
during high water cut period, a mathematical model of five point method well
group was established with the high water cut well group of an Oilfield as the target area, the variation law of
water cut and recovery factor of different injection parameters was analyzed,
and the optimization research of injection parameters of polymer enhanced foam
flooding was carried out. The results show that the higher the injection rate,
the lower the water content curve, and the higher the oil recovery rate. As the
foam defoamed when encountering oil, when the injection time was earlier than
80% of water cut, the later the injection time was, the better the oil
displacement effect would be. When the injection time was later than 80% of
water cut, the later the injection time was, the worse the oil displacement
effect would be. The larger the injection volume, the lower the water content
curve and the higher the recovery rate. After the injection volume exceeded 0.2 PV, the amplitude of changes in water content and
recovery rate slowed down. The optimal injection parameters of profile control
agent for high water content well group in Oilfield A were: injection rate of
15 m3/d, injection timing of 80% water
content, and injection volume of 0.2 PV.