Отправлено: 24.10.12 06:42. Заголовок: Анизотропия

Vertical-Horizontal Permeability Relationships for Sandstone Reservoirs
Authors
Philip C. Iheanacho, SPE, African University of Science and Technology; Djebbar Tiab, SPE, University of Oklahoma; and Alpheus O. Igbokoyi, SPE, African University of Science and Technology
Source
Nigeria Annual International Conference and Exhibition, 6-8 August 2012, Lagos, Nigeria
ISBN 978-1-61399-210-4
Copyright
2012. Society of Petroleum Engineers


Abstract
One of the important petrophysical parameter in reservoir description is the permeability distribution in a given reservoir. It is well known that most reservoir are heterogeneous in nature and homogeneous ones being the few exceptions. Therefore, most reservoirs exist with different degree of permeability anisotropy and reservoir heterogeneity.

This work investigates the relationship between vertical and horizontal permeability in sandstone reservoirs. Various petrophysical properties were estimated from core and log data obtained from a Niger-Delta sandstone reservoir. New and improved correlations between vertical permeability, horizontal permeability, effective porosity and shale fraction were developed for the zones that were analyzed.

These correlations show that there is a strong relationship between vertical permeability, horizontal permeability, effective porosity, and shale fraction for the different zones that were analyzed and that these correlations are affected by the number of flow units in each zone.