Abstract: Water drive type curve method is a common method to predict recovery factor and recoverable reserves. The recoverable reserves calculated from various water drive type curves are significantly different from each other. The curves of water cut vs. recovery percent of recoverable reserves predicted by A, B, C and D water drive type curves are mapped, which is further matched with the water cut rising charts corresponding to each water drive type curves. The result with the highest matching precision is chosen as the final result of the water drive type curve method. The actual applications of the method in Ninghai oilfield, Sha-1 member of Pucheng oilfield and Pu I formation in District Nan-2 and Nan-3 prove that good effects can be gained by using the simple and easy method.