摘要
水驱曲线法是上市储量评估中已开发时间较长的水驱油田比较重要的一种动态评估方法。为了准确快速地获取上市储量评估中水驱曲线的分年产量,避免曲线相交法求解分年产量需要迭代计算带来的麻烦,在研究了水油比与累积产水的线性关系基础上,提出了一种水油比递推计算分年产量的方法。实例计算表明,该方法可以考虑未来开井数即未来产液量的变化;与曲线相交法迭代计算相比计算结果的累计误差在0. 6以内,满足上市储量评估中水驱曲线法分年产量预测的精度要求,提高了上市储量评估中水驱曲线法获取分年产量的工作效率。
The water drive curve is an important dynamic evaluation method for long-developed waterflood oil fields in listed reserves evaluation. In order to accurately and quickly obtain the annual oil production by water drive curve method in listed reserves evaluation,and avoid iterative calculation to solve the annual oil production by the curve intersection method,the linear relationship between WOR and cumulative water production is studied and proved. A recursion formula of WOR for calculating the annual oil production is proposed. The calculation results show that this method can take into account the variation of the number of wells to be opened in the future,i. e.,the future total production variation,and the cumulative error of the calculated results is within 0. 6 compared with the iterative calculation by the curve intersection method. It can meet the precision requirement of the water drive curve method in listed reserves evaluation,and improves the efficiency of obtaining the annual oil production by the water drive curve method in listed reserves evaluation.
引文
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