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Petroleum Geoscience; October 2004; v. 10; no. 4; p. 343-352; DOI: 10.1144/1354-079303-617
© 2004 Geological Society of London
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Original Article

3D high-resolution digital models of outcrop analogue study sites to constrain reservoir model uncertainty: an example from Alport Castles, Derbyshire, UK

J. K. Pringle1, 2, A. R. Westerman1, J. D. Clark1, 3, N. J. Drinkwater4 and A. R. Gardiner1

1 Petroleum Engineering Institute, Heriot-Watt University, Edinburgh EH14 4AS, UK(e-mail: jamie.pringle@pet.hw.ac. uk)
2 School of Earth Sciences & Geography, Keele University, Staffs ST5 5BG, UK
3 Present address: ChevronTexaco, 6001 Bollinger Canyon Road, Building D-1180, San Ramon, CA94583, USA
4 ChevronTexaco Energy Technology Company, 4800 Fournace Place, Bellaire, TX 77401, USA

Advances in data capture and computer technology have made possible the collection of 3D high-resolution surface and subsurface digital geological data from outcrop analogues. This paper describes research to obtain the 3D distribution and internal sedimentary architecture of turbidite channels and associated sediments at a study site in the Peak District National Park, Derbyshire, UK. The 1D, 2D and 3D digital datasets included Total Station survey, terrestrial photogrammetry and remote sensing, sedimentary logs and a Ground Penetrating Radar (GPR) dataset. A grid of 2D GPR profiles was acquired behind a cliff outcrop; electromagnetic reflection events correlated with cliff face sedimentary horizons logged by Vertical Radar Profiling. All data were combined into a Digital Solid Model (DSM) dataset of the site within reservoir modelling software.

The DSM was analysed to extract 3D architectural geometries for petroleum reservoir models. A deterministic base model was created using all information, along with a suite of heterogeneous turbidite reservoir models, using 1D, 2D or 3D information. The model suite shows significant variation from the deterministic model. Models built from 2D information underestimated connectivity and the continuity of geobodies, but overestimated channel sinuosity. Advantages of using 3D digital outcrop analogue data for 3D reservoir models are detailed.

KEYWORDS: outcrop analogues, 3D digital model




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