Some Keys to Hydrocarbon Mass Balance at Basin Scale
J.L. Rudkiewicz, B. Carpentier, and M. Thibaut
Institut Français du Pétrole, 92852 Rueil-Malmaison Cedex France
Hydrocarbon migration modelling aims at reconstructing and whenever possible predicting the trapping of hydrocarbons. Therefore basin modelling can also be used for original oil or gas in place estimation at basin scale. This presentation will focus on this topic and will present its principles and illustrate those on real examples.
This global estimation of hydrocarbon in place goes through several steps, of course in 3D and through geological time. The steps will be illustrated in the paper:1 definition and estimation of the porosity of the main
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2 computation of the surface and pore volume of traps;
3 estimation of the mass of generated hydrocarbons in the various source rocks;
4 estimation of the nature of the expelled hydrocarbons, either oil, condensate or gas;
5 computation of accumulated HC volumes in the previously recognised traps;
6 computation of hydrocarbons lost through capillary leakage;
7 estimation of volumes of hydrocarbons in surface conditions.Traps are either structural or stratigraphic closures. Faults can be taken into account as being either laterally permeable or impermeable. Moreover, lateral fault transmissivity can vary with geological time or with fault azimuth. Lateral facies changes from
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AAPG Search and Discover Article #90066©2007 AAPG Hedberg Conference, The Hague, The Netherlands