油水界面倾角与储集层物性变化关系分析

Relationship between WOC Dipping and Varied Petrophysical Properties

每一个油藏的油水界面在一般情况下都存在一定程度的倾斜,油水界面的倾斜是因为储集层物性参数的变化所致。根据油藏工程和物理化学的有关理论,研究了油水界面倾角与储集层岩石物性参数之间的变化规律,并给出了倾角大小与参数变化的理论方程。使用该理论,对一个实际油藏进行了分析,成功地描述了该油藏渗透率的变化,为该油藏的开发设计提供了依据。

The water-oil contact of each reservoir is dipping to some extent in general, which is resulted from the variation of petrophysical properties in reservoir rocks. Based on the theories of reservoir engineering and physical chemistry, a study is conducted on the relationship between dipping angle of WOC and the variation of petrophysical properties, and a theoretical formula is proposed to calculate the relationship. A case study is presented. The creditable description of permeability variation of a reservoir supports the development scheme of this reservoir.