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Abstract

DOI:10.1306/13311436H43471

A New Efficient Scheme to Model Hydrocarbon Migration at Basin Scale: A Pressure-Saturation Splitting

Sylvie Wolf,1 Isabelle Faille,2 Sylvie Pegaz-Fiornet,3 Franccediloise Willien,4 Bernard Carpentier5

1IFP Energies Nouvelles 92852 Rueil-Malmaison Cedex, France
2IFP Energies Nouvelles 92852 Rueil-Malmaison Cedex, France
3IFP Energies Nouvelles 92852 Rueil-Malmaison Cedex, France
4IFP Energies Nouvelles 92852 Rueil-Malmaison Cedex, France
5IFP Energies Nouvelles 92852 Rueil-Malmaison Cedex, France

ACKNOWLEDGMENTS

We thank Theresa Burke, Ken Peters, and an anonymous reviewer for their invaluable advice and relevant questions. We also thank Quang Huy Tran for his help in correcting the manuscript.

ABSTRACT

Oil modeling in sedimentary basins commonly involves a great variety of complex physics, which leads to a fully coupled nonlinear set of partial differential Previous HitequationsTop. The most classical sequential time stepping is the fully implicit method, which computes pressure and oil saturation simultaneously. Although this method provides accurate solutions, it turns out to be computationally expensive. The aim of this chapter is to propose a new time-stepping strategy that allows computational cost to be minimized while preserving the accuracy of the numerical solution. The new approach is based on separating pressure from oil saturation and using a local time-step technique to calculate the oil saturation. An effective reduction of the central processing unit time is reached and is illustrated through several case studies.

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