历史拟合法计算油水相对渗透率曲线综述

Review of History Matching Method for Calculating Oil-Water Relative Permeability Curves

油水相对渗透率曲线是油藏工程设计的基础数据,直接影响油藏储量评估和最终采收率。目前实验室获得油水相对渗透率曲线的方法主要有稳态法、非稳态法和历史拟合法。然而,稳态法耗时多,通常需要数周的时间才能完成实验;非稳态法假设条件较多,尤其在计算低渗透岩心的油水相对渗透率曲线时显得更加复杂。随着低渗透油藏所占比重的逐年增加,最近十多年历史拟合法成为相对渗透率曲线研究的热点,引起了国内外学者的关注。在大量调研国内外文献的基础上,阐明了历史拟合法的研究现状,总结了发展过程中存在的问题,提出了相应的解决方案,并指出了未来可能的发展方向。

Relative permeability is one of the most important and critical properties which controls the recovery of fluid from reservoir rock. Relative permeability can be obtained through the methods of steadystate,unsteady-state and history matching. However,steady-state method is time consuming and often takes about a few weeks to complete an experiment; unsteady-state method is constrained by some assumption conditions and complicated in data processing,especially for low-permeability cores. The interest of researchers rises in history matching for the last decades as the proportion of low-permeability reservoirs increase year by year. This paper clarifies the research status of history matching method,summarizes the existing problems,and proposes the corresponding suggestions. Furthermore,the future potential development directions of history matching are also included in this paper.