Abstract: During the matching of water-drive type curves, a new type curve is found, and this is a modification of N. V. Sipaqiev’s curve following transformation. After theoretical derivation, the calculation formulas in term of the new water-drive type curve are presented for prediction of the oil recovery rate and technical recoverable reserves in different water cuts. The recoverable reserves are calculated based on the actual data and the result from this curve is compared with ones from other five conventional type curves. The results show that the predicted value from this curve can give higher accuracy.

Key words: water-drive type curve, cumulative production rate, recoverable reserves, water cut