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Fracture control of P-wave azimuthal anisotropy in a Laramide basement-cored anticline at Casper Arch, Wyoming; insights from correlations with surface analogs and curvature analyses
Duke Cooley and Eric Erslev
Fracture control of P-wave azimuthal anisotropy in a Laramide basement-cored anticline at Casper Arch, Wyoming; insights from correlations with surface analogs and curvature analyses (in Application of structural methods to Rocky Mountain hydrocarbon exploration and development, Constance N. Knight (editor), Jerome J. Cuzella (editor) and Leland D. Cress (editor))
AAPG Studies in Geology (2013) 65: 119-138
Fracture control of P-wave azimuthal anisotropy in a Laramide basement-cored anticline at Casper Arch, Wyoming; insights from correlations with surface analogs and curvature analyses (in Application of structural methods to Rocky Mountain hydrocarbon exploration and development, Constance N. Knight (editor), Jerome J. Cuzella (editor) and Leland D. Cress (editor))
AAPG Studies in Geology (2013) 65: 119-138
Index Terms/Descriptors
- anisotropy
- anticlines
- basement
- body waves
- Carboniferous
- Casper Formation
- Cloverly Formation
- Cretaceous
- elastic waves
- folds
- fractures
- Frontier Formation
- geophysical methods
- joints
- Laramide Orogeny
- Laramie Mountains
- Lower Cretaceous
- Madison Group
- measurement
- Mesaverde Group
- Mesozoic
- Mississippian
- Mowry Shale
- North America
- P-waves
- Paleozoic
- Parkman Sandstone
- reflection
- Rocky Mountains
- seismic attributes
- seismic methods
- seismic waves
- structural controls
- style
- tectonics
- U. S. Rocky Mountains
- United States
- Upper Cretaceous
- velocity
- well-logging
- Wyoming
- Casper Arch
Latitude & Longitude
Abstract
In sedimetary basins not currently undergoing primary compaction (e.g., Rocky Mountain Basins), p-wave velocities noticeably vary with azimuth, yet the mechanism(s) controlling the anisotropy remain uncertain. Possible geologic causes for azimuthal anisotropy include but are not limited to sedimentary fabrics, steep bedding, changes in local in-situ or residual stress, and open or mineralized fractures. To test these hypotheses, P-wave velocity azimuths (Vfast) from a proprietary seismic survey of a NNW-trending Laramide Anticline on Casper Arch in central Wyoming were compared to image log data from the seismic coverage area and fracture orientations from nearby analog structures.
ISSN: 0271-8510
Coden: ASGED3
Serial Title: AAPG Studies in Geology
Serial Volume: 65
Title: Fracture control of P-wave azimuthal anisotropy in a Laramide basement-cored anticline at Casper Arch, Wyoming; insights from correlations with surface analogs and curvature analyses
Title: Application of structural methods to Rocky Mountain hydrocarbon exploration and development
Author(s): Cooley, DukeErslev, Eric
Author(s): Knight, Constance N.editor
Author(s): Cuzella, Jerome J.editor
Author(s): Cress, Leland D.editor
Affiliation: Ursa Resources Group II,
Denver, CO,
United States
Pages: 119-138
Published: 2013
Text Language: English
Publisher: American Association of Petroleum Geologists,
Tulsa, OK,
United States
ISBN: 9781629812632
References: 34
Accession Number: 2021-005429
Categories: Applied geophysicsStructural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., geol. sketch maps
N40°40'00" - N42°43'60", W106°34'00" - W105°47'60"
Secondary Affiliation: University of Wyoming,
USA,
United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute.
Update Code: 202105
