逐年计算水驱油田可采储量方法

本文提出了两种水驱油田逐年计算油田可采储量的方法，即广义水驱特征曲线法和水驱理论曲线法。这两种方法认为，对某一具体水驱油田，其ａ值或ｎ值是一个定值，据此可对逐年可采储量进行计算。文中还提出了油田稳定生产和进行重大调整时的水驱计算可采储量方法，及选用不同水驱曲线公式的油田粘度界限，指出了判定水驱油田稳定生产的原则是累积产水量的对数－累积产油量关系与水油比的对数－累积产油量关系平行。提出在油田进行重大

METHODS FOR CALCULATING OIL RECOVERABLE RESERVES OF A WATER-DRIVE FIELD BY YEAR

Two methods for calculating recoverable reserves of water-drive field by year are proposed: (1)the generalized water drive curve method and (2) the water drive theoretic curve method, both considering that for a specific water drive field, its a or n values are constant, and based on this we can calculate the recoverable reserves by year. This paper proposes methods for calculating, with water drive curves, recoverable reserves under the conditions of stabilizing oil production without major development adjustment and of having major development adjustment, and the crude oil viscoisity limits for selecting different water drive curve formulas. The author considers that the principles for judging stable water drive should be the parallel relationships of logWp vs. Np and logF vs. Np. Methods for correcting the water drive curves to apply it to calculating the recoverable reserves under the condition of having major development adjustment are also given in the paper.