Abstract: Aiming at the present development status of Jinzhou 9-3 oilfield at high water-cut stage, reservoir engineering methods were applied to analyze the growth rate of total injection volume, water drive index, water storage rate and composite water cut through evaluating index system of development effect. Afterwards, development status was monitored in time to find out the chief problems and provided theoretical reference for the next comprehensive adjustment. The evaluation result indicated that measures of water controlling weren't taken in time when this field took lots of measures to enhance production. However, the development-adjustment measures after 2004 controlled water cut rising effectively. In the future, in order to improve the development effect, the water detection/plugging should be attached importance to while taking measures to enhance production.