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Successful Reconstruction of the Fluvial Conceptual Model on Gullfaks Sør with Object Modelling
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Petroleum Geostatistics 2019, Sep 2019, Volume 2019, p.1 - 5
Abstract
We show that object models are able to handle real world data complexity by applying a recently published object model to a North Sea reservoir. The reservoir used is the Statfjord formation of Gullfaks Sør, which has rich alluvial-fluvial sandstone deposits. For this reservoir, object modelling of channel objects and crevasse splays is preferred as it provides better geometric control of the channels and crevasses than indicator/data-driven models. However, earlier object models have had problems with conditioning to the amount of well data here. With this new approach, we can condition perfectly on well data, while also reducing the run time compared to previous models. The article addresses the improvements of the well conditioning which is central as it enhances the possibilities of doing automatic modelling of multiple realizations without any subjective modifications by the field geologists around wells. The improvements implicate that the necessary manual time for the geologists to create a good model can be reduced, which again implicates both cost-saving and a more robust automatable model. Our results demonstrate that object models have a vital role to play even in the current data-driven market of our industry.