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Direct Geostatistical Simulation on Unstructured Grids I: Recent Improvements for Additive Variables
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Petroleum Geostatistics 2019, Sep 2019, Volume 2019, p.1 - 5
Abstract
This paper presents an upgraded workflow to address direct geostatistical simulations on unstructured grids. Comparing to previous approaches, this algorithm is based on a recently proposed spectral decomposition applicable to a wide class of variograms and allowing for non-stationarity. The method is encapsulated in a workflow dedicated to unstructured grids including facies modeling and hydrocarbon in place computations. The proposed methodology is able to treat any kind of grid; it takes into account the support effect and it decreases drastically the computation time compared to previous approaches based on Sequential Gaussian Simulations. The method is illustrated on a synthetic example and some results on a true case study are also provided.