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| | Abstract | | Multipoint-geostatistics, providing a powerful function of the facies modeling to reconstruct spacial patterns of geological objects, was employed in reservoir modeling work of the McMurray Formation in Hangingstone field, Alberta, Canada. A sedimentary environment of the target formation considered to be tidally-influenced meandering fluvial system requested the facies models to reflect an image of the point-bar deposits, including a locally-varying feature of the facies distribution with some directional trends as well as a feature of the thin mudstone layers that can adversely impact to SAGD production performance. The multipoint-geostatistical technique succeeded in constructing facies models capturing the features of the point-bar deposits. Trials and errors in generating training images extended knowledge of the multipoint-geostatistics in terms of its practical usage. Integration of the soft probabilities associated with facies proportion derived from seismic data gives constraints to the models to control facies distribution without collapsing the image of the point-bar deposits. Multipoint seismic inversion, a newly-proposed application of the multipoint-geostatistics giving a constraint to the facies distribution from the view point of similarity between synthetic and field seismograms, was also tested in regard to applicability to the real data obtained from the target area. |
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