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Plug-in Attributes
Norway, EAR99
  • 2015 | 2014 | 2016
Plug-in Overview
Blueback ODiSI is a robust joint and simultaneous stochastic inversion method that produces high-quality images of reservoir properties, such as porosity, N/G, HPV and its associated uncertainties. It works using prior distribution models based on a rock physics model and a geologically realistic model that provide close control of the lithofacies proportions
  • No low frequency model required
  • No lateral/spatial constraints applied
  • Jointly inverts to both facies and rock properties (Porosity, NtG) at the same time
  • Simultaneously inverts up to 5 color inverted angle stacks
  • Provides probable values and uncertainty (mean and stdv)
  • Works by generating 1000’s of statistically correct (i.e. follows real-well facies distributions and rock properties) pseudo-wells, generates a synthetic to each and matches to the seismic data The best matching pseudo-wells are then selected to provide mean lithofacies and rock property values and their uncertainties
Produces high-quality images of reservoir properties and uncertanties. Process is strictly based on geological concepts. Modelling is done using Markov Chains for vertical statistic lithofacies followed by a RPM to assign petrophysical and elastic parameters. Pseudo-wells are tied locally to geological interpretation. The computing intensive algorithm is simple, robust and multi-threaded
Additional Information
Jointly developed with BP. For more detailed information, please kindly refer to "Stochastic Inversion by matching to large number of pseudo wells" (Geophysics Vol 81-2016) by Patrick Connolly and Mathew J. Hughes.