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Stochastic Inversion by Trace Matching for Carbonate Reservoir Property Prediction: A Mishrif Reservoir Case Study
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
“BP has developed a one-dimensional stochastic inversion method (ODiSI) for jointly estimating reservoir properties and facies, and also, importantly, the associated uncertainties. ODiSI generates a large number of pseudo-wells consistent with the input prior information (well data and seismic horizons) at each trace location. It then generates a synthetic seismic trace for each pseudo-well, compares these traces to one or more colour-inverted seismic angle stacks and selects the ones that give the best match. These best match pseudo-wells are then analysed to provide estimates of the reservoir properties and associated uncertainty. No low-frequency model is required, and no lateral constraints imposed.
This paper will discuss briefly how the pseudo-wells are constructed and how the matching process is implemented. We will look at the results of the first application of ODiSI to a carbonate reservoir — the Mishrif interval of the Rumaila field, Iraq — and compare the ODiSI outputs to measured porosity logs.”