Effect of anisotropy on water invasion in edge-water drive reservoirs

Document Type

Conference Proceeding

Publication Date

1-1-2006

Abstract

This paper presents the results of a numerical simulation study aimed at evaluating the effect of rock anisotropy on water invasion and oil bypassing in edge-water-drive reservoirs. A complete set of dimensionless groups for 3D immiscible displacement of oil by water in an anisotropic reservoir is selected using inspectional analysis. The dimensionless groups are validated using numerical simulation. Numerical simulation and statistical analysis are also used to evaluate the effect of each group on water invasion. The results show that the end-point mobility ratio (i.e., mobility contrast for oil and water) has the strongest effect on water invasion, followed by the aspect ratios, the dip angle group and the buoyancy number. Also, it has been found out that rock anisotropy controls the geometry of displacement, resulting in water underruning or overriding the oil, which in some cases may lead to substantial bypassing of the oil reserves.

Publication Source (Journal or Book title)

Canadian International Petroleum Conference 2006, CIPC 2006

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