Features of Seismic Inversion for Reservoirs in the Siberian Craton: A Case Study of the Upper Chona Field
The conventional acoustic inversion of seismic data from the Siberian Craton fails to provide reliable reservoir evaluation. Several modifications have been applied to adapt the modelling to acoustically-contrasting thin-layered reservoirs. The background acoustic impedance model generated with the new approach provides information on the number and locations of reflectors. Three kinds of background AI models have been tested: a model with a higher frequency, a cell model, and one obtained by iteration. The cell model has shown the best results and improves significantly the inversion quality. Specifically, it has made possible for the first time to evaluate the reservoir storage capacity (dot product of porosity and net thickness).