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Wipeout Zones – Blame the Rocks  
By Bob Hardage / April 2012

A hydrocarbon exploration application that has caused multicomponent seismic data to be acquired across several offshore areas is the ability of S-wave modes to image geology inside broad, thick intervals of gas-charged sediment where P-P seismic data show no usable reflections.

When All Data Are Not Created Equally  
By Bob Hardage / March 2012

Tidewater areas can be difficult places to acquire consistent-quality seismic data, because different sources have to be used across exposed land surfaces than what are used across shallow-water areas.

Multicomponent Seismic Proves Its Value  
By Satinder Chopra / February 2012

A fundamental thesis of elastic wavefield seismic stratigraphy (or multicomponent seismic stratigraphy) is that S-wave seismic data have equal value to P-wave data for geological interpretation.

The Final Touch: Attributes Prove Their Worth  
By Satinder Chopra / January 2012

Seismic stratigraphy requires interpreters to analyze the geometrical configurations and termination patterns of seismic reflection events.

Euler Curvature Can Be a Calculated Success   
By Bob Hardage / December 2011

Several (12, we think) types of seismic-based curvature attributes have been introduced the last few years – and of these, the most-positive and the most-negative curvatures described in last month’s article are the most popular.

Curvature Computations Enhance Exploration   
By Satinder Chopra, Kurt Marfurt / November 2011

This month's Geophysical Corner deals with a comparison of structural and amplitude curvatures.

Blended Data Renders Visual Value   
By Bob Hardage / October 2011

To co-render seismic attributes means to blend two or more seismic attributes into a single, unified data display.

Deep Thinking: 4C Proves Value on Seafloor   
By Bob Hardage / September 2011

Marine 4C seismic technology was developed to assist hydrocarbon exploration and development – but 4C data have important marine engineering applications that have not been exploited.

For Fractures, P + S = Maximum Efficiency   
By Bob Hardage / August 2011

In areas where fracture-producing stress fields have been oriented at different azimuths over geologic time, there can be fracture sets of varying intensities and different orientations across a stratigraphic interval.

Measuring Fractures – Quality and Quantity   
By Bob Hardage / July 2011

As has been emphasized in the three preceding articles of this series, when a shear (S) wave propagates through a rock unit that has aligned vertical fractures, it splits into two S waves – a fast-S (S1) mode and a slow-S (S2) mode.

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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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