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
Download citation file:
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.
Figures & Tables
The success of Memoir 14 and the worldwide interest shown for data on giant fields prompted AAPG to schedule a symposium on giant fields at the end of each subsequent decade. The 1968-78 symposium was held in Houston, Texas, April 1-4, 1979, and the papers were published in AAPG Memoir 30, December 1980.
The Stavanger Conference "Giant Oil and Gas Fields of the Decade: 1978-1988" was held in Stavanger, Norway, September 9-12, 1990, and is a continuation of the Giants of the Decade series.
Scientific studies and projections of future world energy demand indicate that although alternative-energy fuel sources must be actively pursued and developed, there also must be adequate petroleum supplies to bridge the gap. For the international petroleum industry, the years covered by this conference, 1978-88, were complex. They were years of boom and bust. The world's energy consciousness was boosted sharply by the effects of the 1979 Iranian revolution and the resulting embargo, which sent world oil prices to record heights. Global petroleum exploration soon surged, leading to the industry's all-time drilling high in 1981. Then came the oil price collapse in 1985, and the following years were characterized by falling oil prices and drastic budget cuts for exploration and development.
Although exploration dropped sharply during the latter part of the decade, there was a steady flow of giant oil and gas field discoveries. Using the giant field designation criteria of 500 million bbl of oil recoverable for fields in Asiatic Russia, North Africa, and the Middle East,