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Abstract
Pegaz-Fiornet, S., B. Carpentier, A. Michel, and S. Wolf,
DOI:10.1306/13311438H43472
2012 by The American Association of Petroleum Geologists.
Comparison between the Different Approaches of Secondary and Tertiary Hydrocarbon Migration Modeling in Basin Simulators
Sylvie Pegaz-Fiornet,1 Bernard Carpentier,2 Anthony Michel,3 Sylvie Wolf4
1IFP Energies Nouvelles, Rueil-Malmaison Cedex, France
2IFP Energies Nouvelles, Rueil-Malmaison Cedex, France
3IFP Energies Nouvelles, Rueil-Malmaison Cedex, France
4IFP Energies Nouvelles, Rueil-Malmaison Cedex, France
ACKNOWLEDGMENTS
We thank Scott Barboza, Kenneth Peters, and an anonymous reviewer for their useful remarks and their relevant comments. We also thank Quang Huy Tran for his help in correcting the manuscript and Thierry Gallouet who encouraged us to submit this work for publication.
ABSTRACT
Two major techniques are commonly used to model secondary and tertiary hydrocarbon migration: Darcy flow and invasion percolation. These approaches differ from each other in many ways, most notably in the physical modeling, the methods of resolution, and the type of results obtained. The Darcy approach involves not only buoyancy, capillary pressures, and pressure gradient, but also transient physics, thanks to the viscous terms. Although it can be numerically difficult and therefore time consuming, it is appropriate for slow hydrocarbon movement and it is able to provide a good description of cap-rock leakage. The invasion percolation approach, at least in the context of the implementation used in our examples, does not consider either viscosity or permeability; only buoyancy and capillary pressures drive the hydrocarbon migration. This method is relatively quick and especially useful to simulate secondary migration. Nevertheless, the viscous terms cannot be universally neglected as they can impact the timing of trap filling.
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