广适水驱曲线求解新方法及应用

Solution and application of eurytopic water drive curve

 许家峰 2 张金庆 2 安桂荣 2 耿站立 2 王守磊 2 张鹏 2

中海油研究总院规划研究院，北京 100028 海洋石油高效开发国家重点实验室，北京 100028）

Planning Research Department, CNOOC Research Institute, Beijing 100028, China State Key Laboratory of Offshore Oil Exploitation, Beijing 100028, China)

 广适水驱曲线解决了常规水驱曲线含水率及原油黏度适应范围较窄的问题，但目前广适水驱曲线3个待定常数需采用试凑法求解，结果存在不确定性。文中利用广适水驱曲线水驱动用储量NR与甲型水驱曲线斜率B值关系，结合历史含水率上升规律的误差分析，建立了广适水驱曲线的求解新方法，该方法避免了由于系数q值的变化导致NR值的不稳定性，提高了水驱曲线在产量及含水率上升规律预测中的精度。改进算法后的广适曲线，可应用于水驱油田产液结构调整评价、油井措施前后水驱动用储量评价等。

 The application of normal water drive curve is very limited, while eurytopic water drive curve dissolves this problem. There are three constants, which needs to be solved by test. The result is uncertain with the method. Based on the relationship between gradient B of A type curve and recoverable reserves NR of eurytopic water drive curve, combined with error analysis in water flooding, a new method of solution for eurytopic water drive curve is built. And the instability of NR is prevented because of the change of q. The forecast accuracies of oil or liquid productions and rising law of water cut are enhanced. Also eurytopic water drive curve can be used in liquid production optimization and the recoverable reserves evaluation for oil well improvement.

10.6056/dkyqt201701010