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Abstract
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Chapter from: SG
42: Applications of 3-D 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.
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*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.
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CHAPTER
15
Chapter 15: 3-D
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
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Risch, D. L.,
B. E. Donaldson, and C. K. Taylor, Deep-water facies analysis using 3-D
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. |
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| ABSTRACT
For a stratigraphic sequence
in the Tertiary section of the North Sea Central Graben, seismic attributes
have enhanced the 3-D 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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