Estimation of permeability of sedimentary rocks by applying water-expulsion porosimetry to Katz and Thompson model
Estimation of permeability of sedimentary rocks by applying water-expulsion porosimetry to Katz and Thompson model
复制标题
DOI：
10.1016/j.enggeo.2014.05.016
复制
发表时间：
2014-07
影响因子：
7.4
通讯作者：
N. Nishiyama;T. Yokoyama
中科院分区：
文献类型：
--
作者：
N. Nishiyama;T. Yokoyama
岩石的孔径分布是控制渗透率的重要因素之一。Katz和Thompson模型（KT模型）可以仅使用孔径分布和孔隙度来预测渗透率。以前的研究通常使用压汞法测量的开孔。然而，开孔通常包括不能用于流动的孔，例如死端和凹痕。相比之下，水驱孔隙度法（WEP）产生的信息直接作为流动路径的传输孔隙。用WEP测量了12种沉积岩的输导孔隙的尺寸分布和孔隙度，并将KT模型计算的渗透率与气体渗透仪测量的渗透率进行了比较。渗透率被证明是更好地计算通过使用传输孔隙度，而不是通过开放的孔隙度。讨论了WEP、KT模型和相对渗透率模型在渗透率-饱和度关系估计中的应用。
The pore-size distribution of a rock is one of the important factors controlling permeability. The Katz and Thompson model (KT model) can predict permeability using only pore-size distribution and porosity. Previous studies have conventionally used those of open pores measured by mercury intrusion porosimetry. However, open pores usually include pores unavailable for flow such as dead ends and dents. In contrast, water-expulsion porosimetry (WEP) yields information of transport pores directly serving as flow paths. The size distributions and porosities of transport pores of twelve sedimentary rocks were measured by WEP, and the permeabilities calculated by the KT model were compared with those measured using a gas permeameter. Permeabilities are shown to be better calculated by using transport porosity rather than by open porosity. Application to estimating the permeability–saturation degree relation by combining WEP, the KT model, and a relative permeability model is also discussed.