Quantitative Time-Lapse AVO - Initial Application to the Oseberg Field

A-19 QUANTITATIVE TIME-LAPSE AVO - INITIAL APPLICATION TO THE OSEBERG FIELD Summary 1 Time-lapse (TL) seismic monitoring has become an increasingly successful tool for reservoir management. Currently we are investigating the possibilities for extracting quantitative information from the time-lapse AVO signature. In general this should allow more precise interpretation of time-lapse observations which is necessary for the future step of direct inversion of time-lapse changes to update reservoir parameters (Rowbotham et al 2001). In this study we show the harmful effect on quantitative TL analysis of substantial acquisition differences between the two seismic vintages used and of strong velocity anomalies