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Abstract


 
Chapter from: SG 42:  Applications of Previous Hit3-DNext Hit Seismic Data to Exploration and Production

Edited by: 
Paul Weimer and Thomas L. David

Authors:
Catherine Lewis, Alan P. Laferriere, and Jon R. Schwalbach

Published 1996 as part of Studies in Geology 42
Copyright © 1996 The American Association of Petroleum Geologists.  All Rights Reserved.
 

*Editorial Note: Page numbers in this digital version (HTML and PDF) do not correspond to those of the hardcopy.
Otherwise, the two are the same.
 
 

CHAPTER 15

Chapter 15: Previous Hit3-DNext Hit Interpretation Using Seismic Attributes and Forward Modeling: Case Study of a Deep-Water Channel System in the North Sea

Catherine Lewis*, Alan P. LaferriereÝ, and Jon R. Schwalbachý
 

 

Risch, D. L., B. E. Donaldson, and C. K. Taylor, Deep-water facies analysis using Previous Hit3-DNext Hit seismic sequence stratigraphy and workstation techniques: an example from Plio-Pleistocene strata, Northern Gulf of Mexico, in P. Weimer and T. L. Davis, eds., AAPG Studies in Geology No. 42 and SEG Geophysical Developments Series No. 5, AAPG/SEG, Tulsa p. 143-148.
ABSTRACT


For a stratigraphic sequence in the Tertiary section of the North Sea Central Graben, seismic attributes have enhanced the Previous Hit3-DTop seismic interpretation by imaging a deep-water channel system. Although sands in the channels are seismically invisible, chalk debris flows within the channels appear as high-amplitude reflections, or "bright spots" in the attributes, that mark the axes of the system. Our interpretation of the depositional units initially suggested that the patchy but slightly dendritic pattern of bright spots was part of a distributary channel system. Forward modeling of the seismic attributes indicated that the bright spots do not indicate the presence of hydrocarbons and that individual oil sands cannot be located with the seismic data. Instead, the channels that are prone to sand are delineated by the chalk debris flows that are visible on the seismic attribute maps.

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