TITLE:
Analysis of Factors Influencing Shut in Pressure Cone in Offshore Strong Bottom Water Reservoir
AUTHORS:
Jie Tan, Enhui Sun, Dongdong Yang, Wentong Zhang, Songru Mou
KEYWORDS:
Offshore, Strong Bottom Water Reservoir, Shut in Pressure Cone, Precipitation to Increase Oil Production, Fuzzy Mathematics
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.9 No.4,
April
26,
2021
ABSTRACT: X
oilfield is an offshore strong bottom water reservoir with water cut up to 96%
at present, and liquid extraction has become one of the main ways to increase
oil production. However, the current liquid production of the oilfield reaches
60,000 m3/d due to the limitation of offshore platform, well trough
and equipment, the oilfield is unable to continue liquid extraction. In order
to maximize the oil production of the oilfield, it is necessary to study the
strategy of shut in and cone pressure. Through numerical simulation, this paper
analyzes the influence of different factors, such as crude oil density,
viscosity, reservoir thickness, interlayer, permeability and so on, on the drop
height of water cone and the effect of precipitation and oil increase after
well shut in. At the same time, the weight of each factor is analyzed by
combining the actual dynamic data with the fuzzy mathematics method, and the
strategy of well shut in and cone pressure is formulated for the offshore
strong bottom water reservoir. It provides the basis and guidance for the
reasonable use of shut in pressure cone when the reservoir with strong bottom
water meets the bottleneck of liquid volume.