Journal article

Upscaling two-phase flow in naturally fractured reservoirs

Stephan K Matthai, Hamidreza M Nick



Simulation grid blocks of naturally fractured reservoirs contain thousands of fractures with variable flow properties, dimensions, and orientations. This complexity precludes direct incorporation into field-scale models. Macroscopic laws capturing their integral effects on multiphase flow are required. Numerical discrete fracture and matrix simulations show that ensemble relative permeability as a function of water saturation (kri[Sw]), water breakthrough, and cut depend on the fraction of the cross-sectional flux that occurs through the fractures. This fracture-matrix flux ratio [q fqm] can be quantified by steady-state computation. Here we present a new semianalytical model that uses qfqm ..

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University of Melbourne Researchers


Awarded by Engineering and Physical Sciences Research Council

Funding Acknowledgements

This work was generously supported by the sponsors of the United Kingdom Industry Technology Facilitator and the Technology Strategy Board consortium "Improved Simulation of Fractured and Faulted Reservoirs," Phase 2. We thank O. Gosselin and an anonymous reviewer for their constructive comments, which helped improve the original manuscript.The AAPG Editor thanks the following reviewers for their work on this paper: Olivier R. Gosselin and an anonymous reviewer.