Abstract

In this study, the geological model used for amplitude versus offset (AVO) analysis, was created by synthetic well logs. The geological model is comprised of shale, gassy-sand, clay and sand layers. The synthetic seismic records including 230 shooting and 60 folds were constructed over the model. The data processing has been applied to the synthetic records. After the data processing, AVO analysis has been applied to synthetic data. Class III AVO anomaly has been obtained from the common depth point gathers. Also intercept, gradient, intercept* gradient and cross-plot attributes had been calculated. Analysis has shown that the amplitude increases with increasing offset. The gassy sand anomalies were also obtained by the AVO attributes. In addition, the advantages and disadvantages of AVO analysis were discussed in this study.

Key words: Geological model, reflection amplitude, reflection angle, hydrocarbon rock physics, amplitude versus offset attributes.