Role of effective permeability distribution in estimating overpressure using basin modelling |
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Authors: | Knut Bjørlykke Jens Jahren Per Aagaard Quentin Fisher |
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Institution: | 1. Department of Geosciences, University of Oslo, Oslo 0316, Norway;2. Centre for Integrated Petroleum Engineering and Geoscience, School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK |
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Abstract: | Overpressure generation is a function of the rates of sedimentation, compaction, fluid generation from kerogen and dehydration of minerals, and most importantly the lateral distribution of permeability within a basin as this controls lateral drainage. Sedimentary basins, however, are typically highly heterogeneous with respect to primary sedimentary facies, diagenesis and tectonic development. While fluid flow models based on idealised homogeneous basins may further our understanding of the processes that influence overpressure development, the results are very sensitive to the distribution of rock properties, particularly permeability. The absolute permeability of sedimentary rocks varies from more than 1 Darcy to less than 0.01 nanodarcy (nD) (10−11 Darcy). |
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Keywords: | Overpressue Permeability Sedimentary basins Fluid flow |
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