Stochastic evaluation of fluvial to marginal marine sealing facies |
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| Authors: | SA Barboza R Alway T Akpulat WL Esch PJ Hicks Jr ML Gerdes |
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| Institution: | 1. ExxonMobil Upstream Research Company, P.O. Box 2189, Houston, TX 77252, USA;2. ExxonMobil Exploration Company, 13401 North Freeway, Houston, TX 77060, USA |
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| Abstract: | Hydrocarbon top seal analyses are particularly difficult in fluvial and marginal marine settings. Although these settings often contain beds comprised of a low-permeability, clay-rich lithology associated with high quality seals, their presence does not guarantee an effective seal because individual beds within the stratal unit may be laterally discontinuous. Lateral facies changes, truncation of fine-grained beds, or the presence of crevasse splays may provide cross-stratal migration pathways, reducing the effective sealing capacity to a magnitude less than the closure height. |
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| Keywords: | Seal Seal capacity Cap-rock Capillary pressure Geologic modeling Migration modeling Uncertainty analysis |
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