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Quantitative Integration of Geology and Geophysics for Reservoir Modelling – A Case Study
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010, Jun 2010, cp-161-00159
- ISBN: 978-90-73781-86-3
Abstract
Geology, rock physics and geophysics are combined quantitatively in a geostatistical inversion to produce reservoir models of a tidally influenced shoreline to deltaic environment. The geological input is in the nature of structural elements, stratigraphic elements, depositional environment and prior facies probability volumes. The rock physics is introduced through depth trends, stratigraphic trends and relationships between the petrophysical and elastic rock properties. The geostatistical inversion combines this quantitative information with angle dependent seismic and well log data to produce models that are consistent with all a priori knowledge. The impact of the geological facies probability volumes versus the seismic influence on the results can be estimated by comparing models with those produced using probabilities alone and with those using seismic inversion alone. The geological facies probability volumes ensure that the resultant models are consistent with the depositional environment and the seismic data constrain the lateral variations in facies and property distribution. This modelling is applied to a case study from Vietnam where the results are used to mitigate risk in field development.