ABSTRACT
An Oilfield in Bohai Sea is a typical medium-light crude, high-porosity, and high-permeability oil reservoir, which is a narrow channel deposit, having entered the medium-high water-cut stage. Due to the small number of phase permeability curves, large morphological differences, and strong heterogeneity, the difficulty in the prediction of the law of water-cut rise is great, which affects the potential of the oilfield in the later stage. By studying the permeability characteristics of medium and light oil reservoirs and the water displacement efficiency of different displacement multiples, this paper understands the water-cut rise law and the influence of the degree of water driving recovery of medium and light oil reservoirs from the mechanism, to guide for the later development and adjustment of medium and light oil reservoirs.
