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Geophysical Corner

Volumetric Fault Enhancement Applications  
By Satinder Chopra, Kurt Marfurt / August 2016

Coherence is an iconic attribute available on most interpretation workstations and it helps with the characterization of small and large-scale faults, large structures, fault truncations, buried channels, reef edges and unconformities. There are various algorithms available for coherence computation, each having its advantages and limitations in terms of the quality of coherence imaging of the features of interest and run times associated with them.

Structure-preserving 6-D Interpolation  
By Mark Ng, Dan Negut / July 2016

Interpolation of seismic data is an important application in exploration seismic signal processing. The need for interpolation on incomplete data may be due to acquisition limitations, economic constraints or regularizing of merged data with a variety of shooting parameters from different vintages.

Extracting Large-Scale Fracture Networks  
By Ayon Kumar Dey / June 2016

This work demonstrates a modern workflow that directly extracts high-resolution, large-scale fracture networks from seismic inversion-based structural attributes. The workflow is successfully applied to a thrust-belt controlled, lower Triassic, siltstone reservoir in the Montney Formation of the Farrell Creek area in northeast British Columbia to extract a 3-D fracture network orthogonal to the primary stress direction.

Spectral Decomposition For a More Accurate Image  
By Rongfeng Zhang / May 2016

When seismic data is decomposed into individual frequency components, as is done in spectral decomposition, some subsurface features, such as channels, can be distinguished at certain frequency components.

Synthetic Seismograms for PS Seismic Data  
By Satinder Chopra, Ritesh Sharma / April 2016

Over the last few years, several articles on multicomponent seismic data have appeared in Geophysical Corner describing various aspects of processing and interpretation of such data. In this article, we address an important question about correlation of synthetic seismograms with converted wave PS seismic data.

Enhancement of Multicomponent Seismic Data  
By Satinder Chopra, Ritesh Sharma / March 2016

Our seismic industry has witnessed many revolutions, starting from refraction to reflection imaging (1919), analog to digital recording (1963), the introduction of the common depth point (CDP) technique (1952) and the transition from 2-D to 3-D P-wave seismic data in the 1980s.

Poisson Impedance Application to Shale Resource Characterization  
By Ritesh Sharma, Satinder Chopra / February 2016

The main goal for shale resource characterization is usually the identification of sweet spots, which represent the most favorable drilling targets. Such sweet spots can be identified as those pockets in the target formation that exhibit high total organic carbon (TOC) content, as well as high brittleness. As there is no direct way of computing TOC using seismic data, we adopt indirect ways for doing so.

Preconditioning of Seismic Data Prior to Impedance Inversion  
By Satinder Chopra, Ritesh Sharma / January 2016
The calibration of seismic data with the available well control is an important step that provides the link between seismic reflections, their stratigraphic interpretation and subsequent prediction of reservoir and fluid properties.
Using Volumetric Calculators For Better Accuracy  
By Kurt Marfurt, Lennon Infante Paez / December 2015

We present a simple workflow that allows an interpreter to more accurately extract such attributes using the volumetric calculators available in most commercial interpretation software packages.

Additional Data Helps Investment Decisions  
By Daniel Zweidler, Daniel Baltar, Neville Barker / November 2015

The often-volatile outcome of exploration investment decisions is tightly linked to the level of uncertainty in the geological interpretation and associated value assessment. In order to evaluate subsurface opportunities, information is needed.

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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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