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Geophysical Corner

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.

Drill-Bit Seismic Still Has Teeth  
By Bob Hardage / March 2009

In concept, any type of mechanical vibration that is introduced into the Earth can be used as a seismic wavefield to illuminate and image subsurface geology. Seismic imaging does not always have to be done with controlled, sophisticated sources such as air gun arrays, vibrators or shot hole explosives.

Thinking Nano Is a Big Thing  
By Bob Hardage / February 2009
This month's Geophysical Corner covers the exciting science of nanotechnology which is being introduced into reservoir characterization and monitoring. 

Hey, Who Overturned These Strata?  
By Bob Hardage / January 2009

The methodology described here may benefit those who are confronted with the problem of interpreting complex structures from limited-quality 3-D seismic images.

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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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