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GEOREF RECORD

In-context interpretation; avoiding pitfalls in misidentification of igneous bodies in seismic data

Lennon Infante-Paez and Kurt J. Marfurt
In-context interpretation; avoiding pitfalls in misidentification of igneous bodies in seismic data
Interpretation (Tulsa) (November 2018) 6 (4): SL29-SL42

Abstract

In the past few decades, many exploration wells have been drilled into igneous rocks because of their similar seismic expressions to common exploration targets, such as carbonate mounds, sheet sands, and sand-prone sinuous channels. In cases in which interpreters cannot clearly delineate sedimentary features such as channels or fans, the interpretation may be driven primarily by bright spot anomalies, in which a poor understanding of the wavelet polarity may lead to an erroneous interpretation. Although many wells drilled into igneous rocks are based on the interpretation of 2D seismic data, misinterpretation still occurs today using high-quality 3D seismic data. To address this challenge, we analyze the seismic expression of andesitic volcanoes in the Taranaki Basin, New Zealand and use it to help understand misinterpreted igneous bodies in different parts of the world. Then, we develop an in-context interpretation workflow in which the seismic interpreter looks for key clues above, below, and around the target of interest that may alert the interpreter to the presence of igneous rocks.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 6
Serial Issue: 4
Title: In-context interpretation; avoiding pitfalls in misidentification of igneous bodies in seismic data
Affiliation: University of Oklahoma, School of Geology and Geophysics, Norman, OK, United States
Pages: SL29-SL42
Published: 201811
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 47
Accession Number: 2019-007372
Categories: Applied geophysicsEconomic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Special section; Interpretation pitfalls
Illustration Description: illus. incl. sects., geol. sketch maps
S39°47'30" - S39°47'30", E151°41'60" - E151°41'60"
S39°17'60" - S39°17'60", E175°35'60" - E175°35'60"
S39°17'60" - S39°17'60", E174°04'00" - E174°04'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 2019
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