TITLE:
Study on Remaining Oil at High Water Cut Stage of the Offshore Strong Bottom Water Reservoir
AUTHORS:
Jie Tan, Zhang Zhang, Tingli Li, Jingmin Guo, Mo Zhang
KEYWORDS:
Bohai Oilfield, Heavy Oil Reservoir, Flooding Law, Remaining Oil
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.11 No.6,
June
20,
2023
ABSTRACT: C oilfield is a heavy oil field developed by horizontal wells and
single sand body in Bohai oilfield. The edge and bottom water of the reservoir
is active and the natural energy development mode is adopted. The comprehensive
water cut of the oilfield was 95.3%, which had entered the stage of high water
cut oil production. Some reservoirs were limited by crude oil viscosity and oil
column height. Under the condition of existing development well pattern, some
reserves were not produced or the degree of production was low, and the degree
of well control was not high, so there is room for tapping the potential of
remaining oil. This paper studied the rising law of water ridge of horizontal
wells in bottom water reservoir by reservoir engineering method, and guided the
infilling limit of horizontal wells in bottom water reservoir. At the same
time, combined with the research results of fine reservoir description, the
geological model was established, the numerical simulation was carried out, and
the distribution law of remaining oil was analyzed. Through this study, we
could understand the law of water flooding and remaining oil in the high water
cut period of bottom water heavy oil reservoir, so as to provide guidance for
the development strategy of this type of reservoir in the high water cut
period.