TITLE:
Numerical Simulation of Residual Oil Displacement in Offshore Strong Bottom Water Reservoir
AUTHORS:
Jie Tan, Chunyan Liu, Songru Mou, Bowei Liu, Wentong Zhang
KEYWORDS:
Offshore Sandstone Reservoir, Nitrogen Foam, Different Viscosity, Displacement Experiment
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.5,
May
24,
2022
ABSTRACT: C oilfield is located in Bohai Bay Basin, a typical strong bottom water
reservoir. There is a large amount of remaining oil in the plane and vertical
direction, which cannot be used. Therefore, it is urgent to explore the
feasibility of changing the development mode of typical sand bodies and displacement
mining. In this study, the residual distribution of the bottom water reservoir
is studied through numerical simulation. According to the distribution of
remaining oil in the middle of the two sand bodies and the local structure of
the sand body, it is divided into top remaining oil, edge remaining oil, and
inter well-remaining oil. The effects of different angular permeability laws
and differential and injected medium on the development effect are simulated
and analyzed. It is found that the effect of gas injection is affected by a
high mobility ratio, which is easy to break through early, and the effect of
gas channeling is limited. Using active water and air-water alternate (ammonia
foam) can achieve relatively good results. This experimental study guides
tapping the remaining oil potential in the offshore strong bottom water
reservoir.