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Geophysical Corner

Vertical Wave Testing: Part 2   
By Bob Hardage / January 2010

Vertical wave testing is done by deploying seismic receivers downhole and recording the downgoing wavelet generated by each energy source being considered for surface seismic data acquisition across the area local to the receiver well.

Horizontal Wave Testing Helps   
By Bob Hardage / December 2009

This month’s column is the first of a two-part series dealing with seismic wave tests – horizontal wave testing.

Seismic Aids Heterogeneity Hunt   
By Bob Hardage / November 2009

This month’s column deals with determining reservoir heterogeneity in Athabasca oil sands from surface seismic data. 

Tuning Effects’ Impact on Seismic   
By Bob Hardage / October 2009

Seismic reflection amplitude can be related to net pay and can provide information about the presence or absence of hydrocarbons in a reservoir interval.

Looking Low Aids Data Interpretation   
By Bob Hardage / September 2009

Numerous examples have circulated among the geophysical community that illustrate how some geologic targets can be better seen by constraining the reflected seismic wavefield to a particular narrow range of frequencies.

Welding Geology to Seismic Images   
By Bob Hardage / August 2009

Vertical seismic profiling (VSP) is a measurement procedure in which a seismic sensor is lowered to a sequence of selected depths in a well by wireline, and at each of the downhole receiver stations that sensor then records the downgoing and upgoing seismic wavefields produced by a surface-positioned source.

Thin Is In: Here’s a Helpful Attribute   
By Bob Hardage / July 2009

Here we illustrate another application of that 2008 reflectivity calculation that aids in quantifying numerous geological features – with the emphasis here being on thin beds.

A Powerful Tool for Mapping Faults  
By Alexandra Kirshner, Bruce Hart / June 2009

In this month's Geophysical Corner the authors illustrate the use of a technique known as corendering to assist fault interpretations in a structurally complex area.

Seismic Steps Aid Sequestration   
By Bob Hardage, Diana Sava / May 2009

Sequestration of CO2 in sealed brine reservoirs is an important issue in industrialized countries that are concerned about the impact of excessive atmospheric CO2 on the environment.

Bit by Bit: A Good Seismic Strategy   
By Bob Hardage / April 2009

Last month we looked at the concept of utilizing the axial impacts of the rotating teeth of a rotary-cone drill bit as a downhole seismic source, which allows seismic data to be acquired by surfacepositioned sensors as a well is being drilled.

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Geophysical Corner

Geophysical Corner - Satinder Chopra
Satinder Chopra, award-winning chief geophysicist (reservoir), at Arcis Seismic Solutions, Calgary, Canada, and a past AAPG-SEG Joint Distinguished Lecturer began serving as the editor of the Geophysical Corner column in 2012.

Geophysical Corner

The Geophysical Corner is a regular column in the EXPLORER that features geophysical case studies, techniques and application to the petroleum industry.


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