Abstract: Based on two types of conventional log-log water drive characteristic curves, a new generalized water drive curve is built up, with its relation chart between water cut and reserves recovery percent corresponding to the characteristic curve. Integrated with actual production data, using cut and trial method to change n value, the simulated expression of such a curve is given, by which the recoverable reserves of a block in Xinjiang region are calculated, and compared with the calculated results by conventional I, II, II and IV types of water drive curves, presenting the expression of water cut vs. reserves recovery percent. The case study shows that it is feasible to predict the rising trend of water cut in this block using this new generalized water drive characteristic curve. When n=-0.051, the water cut prediction is the most accurate.

Key words: generalized water drive characteristic curve, water cut, recovery percent, oilfield development