Abstract: The theoretical study of the recovery percent vs. water cut of thin and bottom water reservoir in Luliang oilfield is based on developing its geologic and flow models, obtaining oil-thickness ratio, oil-water viscosity ratio, relative permeability curve parameter and chart of effect of bottom water coning, etc., on water-yielding pattern of the reservoir. The comprehensive research of typical wells in water-yield pattern shows that the theoretical curves are accordant with actual situation, indicating this method is applicable to analysis and prediction of water-yielding pattern in such a reservoir.

Key words: Junggar basin, bottom water reservoir, recovery percent, water cut, bottom water coning