INVERSE ROCK PHYSICS: RESERVOIR CHARACTERIZATION OF THE TYUMEN FORMATION
We performed deterministic reservoir prediction based on inverse rock physics modeling for two oilfields in the West Siberia, Russia. The target zone is Tyumen formation. It consists of a thinly laminated sand-shale-coal sequences. The idea of the proposed method is to calibrate the rock physics model and then apply it in reverse direction for reservoir properties evaluation. In this case, the input data are elastic attributes, the output will be reservoir properties. We applied Bayesian approach for rock physics inversion. As a result, we transformed seismic scale elastic attributes P-impedance and S-impedance into reservoir parameters: volume of sand, volume of clay, volume of coal and porosity.