Chapter 13: AVO Enigmas
Several case histories presented in this volume illustrate instances in which AVO has failed as a gas indicator. In the majority of cases, the drilling logs contain the evidence for the origin of the bright spot and/or AVO anomaly. The logs for the two case histories in this chapter contain no clue as to the origin of extremely attractive amplitude and AVO anomalies. We can only speculate as to the origin of the amplitude and AVO anomalies in these cases.