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Geological Modeling of Naturally Fractured Reservoirs

Minniakhmetov, Ilnur *1; Pergament, Previous HitAnnaTop 2; Akhmetsafina, Alina 3
(1) Moscow Institute of Physics and Technology, Moscow, Russian Federation. (2) Keldysh Institute of Applied Mathematics, Moscow, Russian Federation. (3) ETH Zürich, Zürich, Switzerland.

Fracture existence in the reservoir-rock influences on reservoir porosity and permeability. In spite of low percentage of voids fractures provide high permeability and influence on permeability anisotropy. If fracture system is conductive it provides the main paths of fluid flows and one should use dual-porosity hydrodynamic model. In current work we assume both primary (lithogeneuos) fractures and secondary fractures of tectonic origin.

Based on the geological model of the reservoir we implement a particular algorithm of stochastic object modeling of fractures. In the next step we calculate related permeability and

absolute permeability, i.e. up-scaling. Unique feature of this work is the fact that we developed criterion of connectivity of fracture system.

 

AAPG Search and Discovery Article #90141©2012, GEO-2012, 10th Middle East Geosciences Conference and Exhibition, 4-7 March 2012, Manama, Bahrain