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Geological Society, London, Special Publications; 2008; v. 309; p. 123-134;
DOI: 10.1144/SP309.9
© 2008 Geological Society of London

Articles

Multiscale geological reservoir modelling in practice

Philip S. Ringrose, Allard W. Martinius & Jostein Alvestad

Statoil Research Centre, N-7005 Trondheim, Norway (e-mail: phiri{at}statoilhydro.com)

Geological systems exhibit variability and structure at a wide range of scales. Geological modelling of subsurface petroleum reservoirs has generally focused on the larger scales, driven by the types of measurement available and by computation limitations. Implementation of explicitly multiscale models of petroleum reservoirs is now realistically achievable and has proven value. This paper reviews the main approaches involved and discusses current limitations and challenges for routine implementation of multiscale modelling of petroleum-bearing rock systems. The main questions addressed are: (a) how many scales to model and upscale; (b) which scales to focus on; (c) how to best construct model grids; and (d) which heterogeneities matter most? The main future challenges identified are the need for improved handling of variance and more automated construction of geological and simulation grids.