Journal of Petroleum Science and Technology

Journal of Petroleum Science and Technology

The Effect of Permeability Contrast in Percolation Reservoir Models on the Breakthrough Time Distribution

Document Type : Research Paper

Authors
Sara Shokrollahzadeh Behbahani
Mohsen Masihi
Mohammad Hossein Ghazanfari
Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
10.22078/jpst.2022.4830.1807
Abstract
In waterflooding process, the time for breakthrough of injecting fluid into a production well is of great importance. Predicting this time helps in designing reservoir development plan. Due to uncertainties in reservoir characterization, estimating the breakthrough is not easy, so alternative methods to estimate quickly the breakthrough time is useful. The percolation method uses limited available reservoir data to predict the breakthrough time distribution, and it may be used for engineering applications. However, implementation of this to real reservoirs requires some adjustments. The aim of this study is to show how percolation approach can be used to real problems. In particular, the effects of permeability contrast between the reservoir and non-reservoir parts in the model are investigated. In order to use the breakthrough scaling function to more realistic reservoir models, a dimensionless breakthrough time was used. The analysis of the breakthrough time of models with zero permeability background (tk=0) and such time for the case of non-zero permeability background (tk=αk) shows a linear dependency which can be used to find breakthrough time distribution. Hence, this correction extends the applicability of the percolation method for predicting breakthrough time when permeability of the system background is not zero.
Keywords
Porous Medium
Percolation Theory
Breakthrough Time
Non Zero Permeability
Permeability Contrast
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