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Abstract
Chapter from: SG
42: Applications of  3-D Seismic Data to Exploration and Production
Edited by:
Paul Weimer and Thomas L. David Author:
Darran J. Edwards
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 20
Chapter 20: Using
3-D Seismic Data to Investigate Tectonic Controls on Middle Devonian Reef
Development, North-Central Alberta, Canada Darran J. Edwards*
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Edwards, D. J.,
Using 3-D seismic data to investigate tectonic controls on Middle Devonian
reef development, north-central Alberta, Canada 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. 189-196. |
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ABSTRACT
3-D seismic data are used
to unravel the tectonic history of productive Middle Devonian (Givetian)
patch reef dolomites of the Keg River Formation in the eastern Peace River
Arch area of north-central Alberta. Here, subtle reactivations of an orthogonal
network of Precambrian normal faults has directly influenced reef initiation
and development. A patch reef trend consisting of irregular, low-relief
buildups, together with smaller, neighboring bodies, is clearly identified
to be rooted on raised Precambrian structures. On-structure amplitude dimming
of the normally strong near-Keg River event marks the location of buildups.
3-D mapping allows faults imaged adjacent to Precambrian on-structure dimmed
zones to be traced beneath reefs. Such structures constitute important
fluid migration conduits, often controlling later dolomitization and hydrocarbon
potential of Keg River Formation reefs. |
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