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GEOREF RECORD

Attribute illumination of basement faults, examples from Cuu Long Basin basement, Vietnam and the Midcontinent, USA

Ha T. Mai, Olubunmi O. Elebiju and Kurt J. Marfurt
Attribute illumination of basement faults, examples from Cuu Long Basin basement, Vietnam and the Midcontinent, USA (in Seismic attributes, Anonymous)
Interpretation (Tulsa) (2014) 2 (1): SA119-SA126

Abstract

Geometric attributes such as coherence and curvature have been very successful in delineating faults in sedimentary basins. Albeit not a common exploration objective, fractured and faulted basement forms important reservoirs in Southern California, Mexico, India, Yemen, and Vietnam. Basement faulting controls hydrothermally altered dolomite in the Appalachian Basin of the USA, and is suspected to play a role in diagenetic alteration of carbonates in the Fort Worth Basin of north Texas where copper has been found in some wells, as well as in Osage County, Oklahoma, not far from the classic Mississippi type lead-zinc deposits. Because of the absence of stratified, coherent reflectors, illumination of basement faults is more problematic than illumination of faults within the sedimentary column. To address these limitations, we make simple modifications to well-established vector attributes including structural dip, azimuth, and amplitude gradients, in combination with variance, and most positive and most negative principal curvature to provide greater interpreter interaction. Using these methods, we can better illuminate fracture "sweet spots" and estimate their intensity and orientation. We apply these methods to better characterize faults in the granite basement of the Cuu Long Basin, Vietnam, and the granite and rhyolite-metarhyolite basement of Osage County, Oklahoma, USA. Cuu Long forms an important unconventional reservoir. In Osage County, we suspect basement control of shallower fractures in the Mississippi chat deposits.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 2
Serial Issue: 1
Title: Attribute illumination of basement faults, examples from Cuu Long Basin basement, Vietnam and the Midcontinent, USA
Title: Seismic attributes
Author(s): Mai, Ha T.Elebiju, Olubunmi O.Marfurt, Kurt J.
Author(s): Anonymous
Affiliation: PetroVietnam Exploration Production, Vietnam
Pages: SA119-SA126
Published: 2014
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 9
Accession Number: 2014-105080
Categories: Structural geologyApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N36°10'00" - N37°00'00", W97°04'60" - W96°00'00"
Secondary Affiliation: BP America, USA, United StatesUniversity of Oklahoma, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201452
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