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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
AAPG Bulletin, V.
2004. The American Association of Petroleum Geologists. All rights reserved.
High-frequency
sequence
stratigraphy from seismic sedimentology: Applied to Miocene, Vermilion Block 50, Tiger Shoal area, offshore Louisiana
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Hongliu Zeng,1 Tucker F. Hentz2
1Bureau of Economic Geology, John A. and Katherine G. Jackson School of Geosciences, The University of Texas at Austin, University Station, Box X, Austin, Texas 78713-8924; [email protected]
2Bureau of Economic Geology, John A. and Katherine G. Jackson School of Geosciences, The University of Texas at Austin, University Station, Box X, Austin, Texas 78713-8924; [email protected]
AUTHORS
Hongliu Zeng has been a research scientist for the Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, since 1997. His research interests include seismic sedimentology, seismic stratigraphy, and special seismic processing, as applied to petroleum prospecting. He earned his B.S. (1982) and M.S (1985) degrees in geology from the Petroleum University of China and his Ph.D. (1994) in geophysics from the University of Texas at Austin.
Tucker F. Hentz is a research associate at the Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, which he joined in 1982. He graduated cum laude with a B.A. degree in geology from Franklin Marshall College in 1977 and received his M.S. degree in geology from the University of Kansas in 1982. His research interests include the regional
sequence
stratigraphy of gas-bearing successions in the Anadarko basin, Rio Grande Embayment, and Gulf Coast Basin.
ACKNOWLEDGMENTS
We acknowledge the significant research contributions to this study made by our colleagues: L. J. Wood, M. V. DeAngelo, L. F. Brown, Jr., A. C. Badescu, C. O. Kili, and Y. Hu. Reviews by L. J. Wood, S. P. Dutton, R. Loucks, and Bulletin reviewers M. M. Backus, R. M. Mitchum, and J. A. Pacht have improved the presentation and are greatly appreciated. Figures were prepared by P. Beard under the direction of J. L. Lardon. L. Dieterich completed copyediting prior to submission of the draft.
This article was prepared with the support of the U.S. Department of Energy (DOE), under Cooperative Agreement No. DE-FC26-98FT40136. Any opinions, findings, conclusions, or recommendations expressed herein, however, are those of the authors and do not necessarily reflect the views of the DOE. As an industry partner, ChevronTexaco contributed the well
-
log
, production, and 3-D seismic data. Landmark Graphics Corporation provided software for display of
well
-
log
correlations and interpretation of seismic data via the Landmark University Grant Program. Published with the permission of the director, Bureau of Economic Geology, John A. and Katherine G. Jackson School of Geosciences, University of Texas at Austin.
ABSTRACT
We introduce a seismic-sedimentological approach for mapping high-frequency (fourth-order) sequences and systems tracts using well
and three-dimensional seismic data. Key techniques include (1) conditioning seismic data to
log
lithology by 90
phasing for better
well
-
log
integration and (2) imaging and interpreting the sequential, planoform geomorphology of the depositional systems. We recommend a new interpretation procedure that shifts the emphasis of high-frequency
sequence
-stratigraphic studies from interpreting vertical seismic sections to analyzing more horizontal, high-resolution, seismic-geomorphologic information.
This case study shows that stratal slicing in lithology-conditioned seismic data provides sequential seismic imagery of generally contemporaneous depositional systems. This imagery, in turn, serves as a basis for recognizing and mapping high-frequency systems tracts, sequence
boundaries, and sequences in a geologic-time domain. In Miocene strata of offshore Louisiana, fourth-order sequences or
sequence
sets from
well
data can be seismically mapped at a resolution equivalent to 30 ft (10 m) in thickness from a 30-Hz dominant-frequency seismic data set. The resolution is sufficient for an accurate reconstruction of the high-frequency
sequence
-stratigraphic framework in the region of seismic coverage outside
well
control.
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