Articles

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September 1994

Ricker, Ormsby, Klander, Butterworth – A Choice of Wavelets

Harold Ryan

Commercially available software used to generate synthetic seismograms gives the geophysicist a choice of up to four types of standardized wavelets as well as the option of a user-defined wavelet. This review article will summarize the characteristics of these wavelets, illustrate the shape of the wavelets and their frequency spectrum…

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June 1994

The Future Role of the Seismic Method in Petroleum Exploration

S. Rutt Bridges

Experts from a variety of fields have predicted a revolution in computational power within the next five years. It is now apparent that we will soon have desktop Cray Y-MP equivalents and parallel machines readily available as network compute servers with teraflop performance. In addition, we will have the capability…

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June 1994

Sudhir Jain

Barbara Young

A cornerstone in the geophysical research and development field in Calgary for the last 20 years, Sudhir Jain, will be closing his company, Commonwealth Geophysical, at the end of June and moving on to other things. Sudhir's contribution to the geophysical community, not only in new software and techniques for…

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June 1994

C.S.E.G. Annual Meeting & Awards Luncheon

CSEG Executive Committee

The CSEG Annual Meeting was held March 15th, 1994 at the Westin Hotel. A Very Successful lunch time Awards Presentation and Business Meeting as well as a presentation on Earthquakes near Fort St. John. B.C.. was enjoyed by all in attendance. Several Societies within our industry were represented. 

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June 1994

C.S.E.G. Geophysical Workstation SEGY Standards

Doug Bath

With the proliferation of geophysical workstations in the industry it was felt by several members that the standards for SEGY stack data should be re-examined and if necessary brought up-to-date. Accordingly a committee was formed to discuss standards for geophysical workstation SEGY data formats. The following is a summary of…

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May 1994

Workshop on Problems with Phase

Stewart Trickett

On the afternoon of May 6, 1993, the final day of the annual convention of the Canadian Society of Exploration Geophysicists, a workshop entitled "Problems with Phase" was held at the Calgary Convention Centre. It produced a fascinating look at a subject which, despite its longevity, continues to present major…

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April 1994

Optimization Methods for Prestack and Poststack Migration (Migration without Migraines)

Larry Lines, Andrew Burton and Han-xing Lu

Increased efficiency of finding and developing hydrocarbon resources while reducing the environmental impact through geophysical technology is critical to the future of the petroleum industry. This technology must remotely determine rock-fluid property characteristics, their geometry, and changes over time. In reviewing advancements in exploration seismology, three component 3-D seismology stands…

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April 1994

The APEGGA Registration Process

John Peirce

The CSEG/CSPG/APEGGA Liaison Committee has been considering issues that commonly arise in discussions with geologists and geophysicists when the subject of APEGGA is raised. The goal of the committee is to try to facilitate change from within the system in order to demonstrate that APEGGA can be sensitive and can…

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April 1994

Ground Penetrating Radar Investigation of the Canada Creosote Site, Calgary

Don Lawton and Harry Jol

The application of geophysical methods for near-surface studies related to environmental monitoring has increased significantly over the past few years. Knowledge of an industrial site is now required prior to plant construction, as well as for site remediation when industrial plants are dismantled. In particular, the presence of contaminants in…

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April 1994

University Profile University of Waterloo

John P. Greenhouse

The Earth Sciences Department at the University of Waterloo was founded in 1965, an offshoot of Civil Engineering. Today it is one of the largest geoscience departments in Canada, with 31 faculty, 26 Adjunct faculty, and a staff of 48. Our undergraduate population is currently 197, 116 in Science and…

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March 1994

Earthquakes and Hydrocarbon Production Near Fort St. John, B.C.

R.B. Horner, J.E. Barclay and J.M. MacRae

Beginning in 1984, a number of earthquakes have occurred in a region of oil and gas production just north of Fort St. John, B.C. Through 1993, 24 events have been detected ranging in magnitude (M) from about M 2.5 to M 4.1. The activity over the past two years has…

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March 1994

Recent Advances in Gravity Acquisition and Instrumentation – Part II

Dr. Erwin Ebner

Very high quality gravity surveys have been carried out for nearly half a century now. I have personally seen small gravity survey results from the late 1940's which rival present day quality. The main reason for this lies in the care with which these surveys were acquired. It took considerable…

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February 1994

An Evaluation of Ground Penetrating Radar for Imaging the Near Surface Examples from Contaminant Map

Don C. Lawton and Harry M. Jol

Ground penetrating radar (GPR) is becoming established as a new geophysical technique for imaging the near-surface. In this presentation, we assess GPR in terms of its application in the petroleum industry, and evaluate its capabilities for mapping a contaminated site near downtown Calgary and for delineating the internal geometry of…

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February 1994

3-D Survey Design by Computer

Mike Galbraith

3-D Acquisition requires careful planning. Laying out lines of receivers and lines of shots must be done with an eye to the expected results. Computer programs are now available to assist the geophysicist in this task.

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January 1994

3-D Survey Design by Computer

Mike Galbraith

oday's 3-D surveys can be large or small, laid in straight lines across deserts or tundra or along winding roads through forest and jungles. Because 3-D acquisition requires careful planning it is essential to analyze the complexities which naturally arise. Computer programs are now available to assist the explorationist with…

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January 1994

Pole Shooting

Rupert Goodhart

Surface shooting and other portable techniques were introduced to Canada to eliminate the impact of "dozing" wide seismic lines in beautiful and fragile terrain. The Foothills are not only a petroleum province with hydrocarbon resources in the many billions of dollars, but an area of scenic beauty without compare which…

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December 1993

1993 SEG Summer Workshop

Michael Enachescu

This year's SEG summer research workshop took place August 1-6, 1993, in Rancho Mirage, an exclusive golf and country resort situated in the southern California desert area. The day most of the participants arrived, the Palm Springs airport was shut down at 5 pm due to over-heating of the tarmac.

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December 1993

CSEG/CSPG/APEGGA Liaison Committee

John W. Peirce

The CSEG/CSPG/APEGGA Liaison Committee has been focussing on issues of concern which have been raised by geologists and geophysicists who have complained about certain APEGGA policies. Our goal is to try to facilitate change from within the system in order to demonstrate that APEGGA can be sensitive to members' needs…

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December 1993

Trends in Seismic Data Acquisition – A Perspective

Kevin Williams

Many of the technical changes taking place in the oil industry are evident in the office of the explorationist. Desk top processing, workstation based 3D interpretation and visualization packages are familiar tools to the "state of the art" geophysicist.

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November 1993

Limitations on the performance of field arrays and FK filters: models, case histories and remedies

John L. Varsek and Rod Morris

Not generally appreciated at first glance, but nonetheless crucial to understanding the recording and imaging of reflections, is the linkage between acquisition arrays and fk filters. 

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