Based on lab data this paper summarizes differences of petrophysical parameters of sandstones in Daqing Oil Field which were not watered out before waterflooding and were watered out after waterflooding. Pore throat dimensions, relative permeability, and wettability change with prolonged waterflooding. Using internal waterflooding at an early stage is a method of maintaining the reservoir energy and achieving long — term high and stable production. Injecting a great quantity of water for a long time is an effective means of enhancing oil recovery of reservoirs for Daqing Sandstone Oil Field.

Keywords:
structural geology, variation, enhanced recovery, Fluid Dynamics, flow in porous media, Daqing Oil Field, Reservoir Characterization, Upstream Oil & Gas, Sandstone Reservoir, petrophysical parameter
Subjects:
Exploration, development, structural geology, Flow in porous media, Improved and Enhanced Recovery, Reservoir Characterization, Reservoir Fluid Dynamics
Copyright 1997, Society of Petroleum Engineers
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