Articles

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December 1995

1996 Election of Officers Candidates

Overview of the 1996 CSEG Executive election candidates.

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December 1995

Effective Geophysical Writing and Presentation

Robert R. Stewart, R. James Brown and Don C. Lawton

James Michener (1992) wrote, "The writer who sits at his or her desk with an empty piece of paper staring back is like the explorer who stands at the edge of a new continent, uncertain of how to proceed" – an exciting but perhaps difficult position. The goal of this…

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December 1995

The Doodlebugs

Sharon Stevens

A doodlebugger? What is a doodlebug and where did that name come from? A definitive answer was what I was searching for. But a variety of responses is what I found...

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November 1995

Depth Imaging of Seismic Data from Structurally Complex Areas

Larry Lines, Wen-ling Wu, Han-Xing Lu, Andrew Burton, and Jinming Zhu

Recent geophysical research has made widespread use of depth migration and velocity analysis in our efforts to improve seismic images in structurally complex areas. Such structural exploration problems include the imaging of salt intrusions and faulted structures from offshore Newfoundland, and the delineation of thrust faulted structures from the Alberta…

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November 1995

From Horses to Helicopters: Bill Sydorko's 45-year Career in Seismic Field Work Mirrors an Industry's Coming-of-age

Samantha-jane Mugridge

Bill Sydorko has progressed from working on geophysical crews of four or five men in 1950 to supervising crews of up to 30 men during the 1980s and 90s. Where 16 or 24 traces per seismic record were once standard, now he routinely deals with a minimum of 144 per…

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October 1995

3-D Prestack Time Migration of Canadian Plains Data: When and Why It is Needed

Mike Perz and Peter Cary

Today's generation of superscalar workstations and high performance supercomputers allows full prestack time migration of 3-D data volumes within a time frame that is manageable from the explorationist's viewpoint. Most geophysicists are aware that performing prestack time migration on structured data sets offers certain advantages, particularly from the viewpoint of…

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October 1995

Applied AVO Analysis: Use and Abuse of Amplitude Variation with Offset

John P. Castagna

The great promise of amplitude-versus-offset (AVO) analysis lies in the dependence of the offset-dependent-reflectivity of reflected compressional waves on the elastic properties of the subsurface. As different lithologies may exhibit distinct Poisson's ratios, and gas bearing strata usually exhibit anomalously low Poisson's ratios, AVO has been recognized as a potential…