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Chapter 10: Integration of Chimney, Waveform Segmentation, AVO, and Absorption Attributes for Evaluation of Deep and Shallow Gas: A Southeastern Louisiana Case History*

By
Andy Clifford
Andy Clifford
Saratoga Resources, Houston, Texas, U.S.A. E-mail: aclifford@saratogaresources.net.
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Fred Aminzadeh
Fred Aminzadeh
University of Southern California, Los Angeles, California, U.S.A.
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David Connolly
David Connolly
dGB Earth Sciences, Houston, Texas, U.S.A.
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Published:
January 01, 2013

Abstract

Gas-chimney analysis is a useful tool for evaluating shallow and deep hydrocarbon prospects by showing likely migration routes for deeply sourced thermogenic hydrocarbons as well as shallower biogenic hydrocarbons. Specialized seismic processing conditions the 3D data set so that only meaningful gas chimneys are analyzed. Once the data have been so conditioned, the interpreter can differentiate between faults that show evidence of leakage and those that do not show evidence of leakage and may be sealing faults. Many of the shallower chimneys can be tied directly to active surface seeps as well as shallow gas prospects and known hydrocarbon deposits. When this type of chimney analysis is coupled with techniques such as waveform segmentation, amplitude variation with offset, and absorption attribute analysis, the result is a very powerful 3D data volume that can be used to derisk shallow and deep gas prospects.

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Contents

Geophysical Developments Series

Hydrocarbon Seepage: From Source to Surface

Fred Aminzadeh
Fred Aminzadeh
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Timothy B. Berge
Timothy B. Berge
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David L. Connolly
David L. Connolly
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Society of Exploration Geophysicists
Volume
16
ISBN electronic:
9781560803119
Publication date:
January 01, 2013

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