Abstract: The water drive performance curves of the first and second types can be drawn after the natural or artificial water drive mechanism prevails in an oil field. The time when the straight line starts, the tortuosity and correlativity for the straight line are different tor various fields. The straight line and its changes, as well as type curves, can be used to consider the accuracy of geological reserves in place estimated with volumetrical method and some important performance terms, can be used to identify the state of water drive and the result of treatment, and to predict the ultimate re-ccneiy. They can aLso be used to guide the development for the same type of fie Ids.
A computer program of the Tong's analysis method of water drive performance curve was written on a TX microcom puter soft ware. The required wnter drive curves and the resultnni performance indices can be obtained with the orogram when the relevant data are input into the computer. In this paper water drive curve analyses were performed for the L-5 field in Caidamu Basin, Karamay field anJ some large oil iieids in L'SSR. The result were compaicd and discussed in detail.