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.

Results Shine for New Technology  
By Bob Hardage / December 2008

China Case: Fracture Data Integrated  
By John Tinnin, James Hallin, Jim Granath, Peter Stewart / November 2008

China Study: Detecting Fractures  
By Peter Stewart, John Tinnin, James Hallin, Jim Branath / October 2008
This two-part series describes how Sinopec’s local operating company, Southwest Petroleum Branch (SWPB), utilized full-wave seismic data to improve production from a fractured tight-gas reservoir in XinChang Field, Sichuan Province, China. 
Options Exist for Surface Problems  
By Bob Hardage / September 2008
Last month in this space we showed that in areas where poor-quality seismic data are acquired across a high-velocity surface with surface-based geophones, good-quality reflection events are created at deep interfaces below this high-velocity surface layer. 
Getting Under Surface Challenges  
By Bob Hardage / August 2008
In general, the quality of conventional P-wave seismic data is poor when data are acquired across areas where high-velocity rocks (primarily carbonates and basalts) form the exposed, first-layer of the Earth.
Is the Future of Seismic Passive?  
By Bob Hardage / July 2008
Passive-seismic technology encompasses any procedure by which seismic data are recorded without the use of an active seismic source.
Questions? VSP May Have Answers  
By Bob Hardage / June 2008
Vertical seismic profiling (VSP) began to be popular among non-Soviet scientists in the late 1970s, about the time that my previous employer, Phillips Petroleum Company, and our partners were trying to determine development strategies for newly discovered fields in the Greater Ekofisk area of the Norwegian North Sea.
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Geophysical Corner

Geophysical Corner - Satinder Chopra
Satinder Chopra, chief geophysicist (reservoir), at Arcis Seismic Solutions, Calgary, Canada, began serving as the editor of the Geophysical Corner column in 2012.

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


Geophysical Corner

Geophysical Corner - Bob Hardage
Bob A. Hardage, senior research scientist at the Bureau of Economic Geology, the University of Texas at Austin served as editor of the Geophysical Corner from 2006 to 2011.

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