Barbara Field, Adriatic Sea, Offshore Italy: A Giant Gas Field Masked by Seismic Velocity Anomaly-A Subtle Trap
A. Ianniello, W. Bolelli, L. Di Scala, 1992. "Barbara Field, Adriatic Sea, Offshore Italy: A Giant Gas Field Masked by Seismic Velocity Anomaly-A Subtle Trap", Giant Oil and Gas Fields of the Decade 1978-1988, Michel T. Halbouty
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Barbara gas field, discovered in 1971, is located in the northern sector of the Adriatic offshore. It is a gentle anticline, involving Quaternary clastic sediments, shaped by carbonate Mesozoic morphology.
The presence of shallow gas pockets at the crest of the structure distorts the seismic signal to such an extent that structural reconstruction is not immediate.
Seismic attribute analysis provides, however, a key to the understanding of the seismic anomalies and is a valuable tool for the reconstruction of the real structural configuration of the field.
The appraisal history of the field illustrates how the progressive understanding of the above-mentioned complications helped upgrade the reserves from an initial value of 10 billion m3 of gas to 40 billion m3, making Barbara the most important Italian gas field of the decade.