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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 62 (1978)

Issue: 12. (December)

First Page: 2481

Last Page: 2488

Title: VAMPs--Possible Hydrocarbon-Bearing Structures in Bering Sea Basin: GEOLOGIC NOTES

Author(s): David W. Scholl, Alan K. Cooper (2)

Abstract:

Narrow (1 to 2 km) subsurface columns of concave reflection horizons are common time-base seismic profiles collected in the Bering Sea basin. The columns of recorded downflexures are thought to be velocity pulldowns and commonly are associated with one or more arched or gently domed high-amplitude reflection horizons about 100 m higher in the section. Inferred from this association is that subsurface deposits characterized by anomalously low acoustic velocity are present.

We refer to the velocity-anomaly and reflection-amplitude association as a velocity-amplitude feature, or VAMP, and speculate that VAMPs are deep-seated "bright spots" underlain by a strong velocity pulldown possibly caused by gas-charged deposits.

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