Articles

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February 1996

Making the CSEG’s Equity Further the Goals of the Society

Susan R. Eaton

The following brief presents my ideas on making the CSEG equity work toward furthering the goals of the Society and toward making the CSEG a more vibrant organization in the future. I hope my suggestions and examples will generate a spirited discussion amongst CSEG members, and will serve as a…

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January 1996

Complex Deformation Models from the Debolt Gas Fields of the N.E. British Columbia Foothills, as seen on 2D and 3D Seismic

Andrew C. Newson

The interpretation of seismic data in the foothills is typically model driven in areas where the quality of this seismic data is moderate to poor in quality. The deformation model used by the interpreter will have a major impact on locating wells on the structures and calculating in-place reserves.

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January 1996

Good Computer Contouring/Modelling Can Help the Geophysical Interpreter

Richard Banks and J. Brian Henry

This is the first in a series of articles on contouring, or modelling, to use the more appropriate term. The purpose of this series is to develop the principles and role of contouring in present day exploration. The first of the four articles discusses basic gridding and triangulation techniques. The…

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January 1996

The C.A.G.C. Needs You!

Rolf Wenzel

In a blatant attempt to expand membership to achieve its secret goal of planetary domination through geophysical prospecting, the Canadian Association of Geophysical Contractors has submitted a spontaneous interview with its President, Mr. William The Hammer Kammermayer to explain the purpose and functions of the C.A.G.C.

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December 1995

Alberta Labour’s Provincial Seismic Program

Jim Shaffer

Alberta Labour has identified six specialized program areas in its Business Plan for 1995. The specialized program areas include Seismic, Residential Construction, Forestry, Steel and Iron Foundries, Mining and Trenching.

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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…

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September 1995

Why Perform 3-D Prestack Time migration on the Prairies?

Mike Perz

Hardware platforms have now achieved a level of sophistication which permits the use of full 3-D prestack time migration as a production-style processing tool. While most geophysicists are aware that performing 3-D prestack time migration on structured data sets offers certain advantages, particularly from the viewpoint of velocity analysis, many…

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September 1995

Interpretation of Aeromagnetic Data

Erwin Ebner, John Peirce and Nathalie Marchand

The previous three articles of this series on Potential Field (PF) Geophysics dealt with recent technical improvements in magnetics and gravity instrumentation as well as with critical components concerning data acquisition and PF project management. This article focuses on processing and interpretation of aeromagnetic data. Key aspects of each of…

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September 1995

The CSEG Internet Services

Howard G. Hepburn

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June 1995

Project Planning and Management for Magnetic Gravity Surveys

Erwin Ebner

The first two articles of this series on potential field (PF) geophysics dealt with recent technological improvements in gravity and magnetics survey systems. This article addresses issues from a project management perspective where questions such as Why are we doing this? What are we going to get out of it?…

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June 1995

Using Geostatistics to Aid in Reservoir Characterization

Sheldon B. Gorell

Proper characterization of reservoir heterogeneities is a well recognized requirement to predict reservoir performance accurately. Given the large investment requirements, long development schedules, and the often uncertain economic outlook, sound decision making requires reasonable estimates of how much, and when, oil will be produced. It is no longer sufficient to…