Establishment of a Geological Fracture Model for Dual Porosity Simulations on the Ekofisk Field
In order to construct a geologic fracture model for use in dual porosity simulation of the Ekofisk Field, all cored wells on the field were examined, and both lithological and fracture data were assembled. Fracture density distribution in the reservoir was mapped on the basis of estimated tectonic matrix block dimensions in the cored walls. Observed relationships between fracture density, lithology and structural positions formed the basis for statistical evaluation of logs in non-cored wells to assess the fracture density in areas outside the control of cored wells. Different logfacies types, defined by cluster analysis on log data, were quantified with respect to fracture density, and the tectonic fracture densities were predicted and mapped per reservoir layer. Equations for calculating fracture porosity and permeability were subsequently established, and the results contoured.
KeywordsDebris Flow Fracture Network Matrix Block Fracture Permeability Fracture Porosity
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