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New Technique for Rock Physics Prediction Based on the Seismic Interpretation
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
This work presents an innovative method to predict rock properties within the seismic volume. The propagation of well log data is guided by a relative geological time model, resulting from a global seismic interpretation. Whereas most of the classical techniques are based on the propagation of the data along a few selected horizons with a vertical interpolation, the method proposes a global propagation directly inside the RGT model to reduce uncertainties in the prediction of the rock property. Among all the existing geostatistical methods, we have used inverse distance, kriging and cokriging for the interpolation. Since a volume is composed by various geologies characterized by the variability of the seismic facies, the parameters of the propagation have to be adjusted for each defined stratigraphic interval. Applied on a North Sea case study in the K05 area, this technique has shown successful results, where spatial and vertical heterogeneities of complex faulted deposits could be enhanced in the reservoir level. The method appears to be particularly efficient in strongly faulted areas where the interpretation is difficult. It can be used to generate velocity or synthetic model or, to some extent, the a priori model for the seismic inversion process.