有效渗透率与绝对渗透率的差异性分析

Difference Analysis Between Effective Permeability and Absolute Permeability

压力数据试井解释不仅能得到井筒参数,还能得到平均地层压力与渗透率等。对多相流体的压力数据,现场往往采用单相渗流进行试井解释,所得到的渗透率是有效渗透率。有效渗透率与绝对渗透率有很大的差异。通过对有效渗透率的分析,揭示有效渗透率与绝对渗透率间的关系,有效渗透率要小于绝对渗透率,二者的差距主要由饱和度与相对渗透率决定。由此可获得油田开发状况如饱和度分布等的有用信息。

Well test interpretation results include well storage,well skin,average oil field pressure and permeability.Analytical well test is always used to analyze the pressure data of the multiphase and the resulting permeability is effective permeability,which is different from absolute permeability.Based on the analysis of the effective permeability,the relationship of the effective permeability and absolute permeability is obtained and their difference is mainly decided by the saturation and relative permeability.