Based on sedimentary characterizations of the fluvial-deltaic reservoirs in Daqing oil field, the rules of oil and water movement in various sedimentary facies were analyzed in the process of waterflooding programs, then remaing oil distribution in such reservoirs was presented. Mechanisms to leave current remaining oil patterns were investigated in light of areal and vertical characteristics, indicating potentials of improved waterflooding of the remained oil in the reservoirs.

Keywords:
delta front sheet sand, channel sand, structural geology, reservoir, heterogeneity, upstream oil & gas, oil distribution, high water cut stage, society of petroleum engineers, waterflooding
Subjects:
Reservoir Characterization, Reservoir Fluid Dynamics, Improved and Enhanced Recovery, Exploration, development, structural geology, Flow in porous media, Waterflooding, Conformance improvement
Copyright 2003, Society of Petroleum Engineers
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