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GSH Technical Breakfast

Wednesday 8-Feb-2012 7:00 AM to 8:30 AM CST

Fugro Building

6100 Hillcroft Ste 100
Houston TX 77081
Google Maps | Hotels Near | Yahoo! Maps | Weather Forecast

Speaker Jennifer Lewis

Position: Geophysical Coordinator
Company: Chevron

Event Description

 
 
A method for reducing phase uncertainty for improved prospecting in frontier basins
 
Earth scientists are familiar with the Earth’s absorptive effects on seismic energy, which is often represented by the Quality Factor, Q.  Interpreters understand that attenuation causes amplitude and frequency degradation with travel time, and processors apply phase-only Q compensation in time processing to address dispersion effects.  Still, background Q, much less a spatially variant field, is notoriously difficult to characterize, and most seismic products retain amplitude and phase errors that may be unrecognized, ignored, or attributed to the black box that is seismic.  This translates into increased uncertainty in interpretation of events, relative amplitudes, AVO classification, and depthing, to name a few.
 
Well data, in particular VSP waveforms, can help to describe and correct for Q locally.  Seismic processing companies are recognizing the value of amplitude and phase Q compensation, deriving Q fields tomographically and applying the compensation through 3D prestack depth migration.  However, in frontier areas with little or no well control, the first well locations are often selected off of speculative time migrated products, and uncertainties in attributes such as phase are difficult to quantify.  A workflow is shown here that utilizes the AVO model from offset wells to better understand errors in phase for improved prospecting.
 
 
 

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Please RSVP to Liz Ivie at: livie@fugro.com
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Liz Ivie Liz Ivie
(713) 369-5863 (713) 369-5863
(713) 369-5860 FAX FAX (713) 369-5860 FAX FAX
   

GSH Technical Breakfast

Wednesday 8-Feb-2012 7:00 AM to 8:30 AM CST

Speaker Jennifer Lewis

Position: Geophysical Coordinator
Company: Chevron

Biography

 
    
                   Jennifer Lewis is currently the Geophysical Coordinator of Chevron’s      Liberia Exploration Business Unit. She originally studied earthquake seismology and regional tectonics of southern California at San Diego State University and graduated in 2000 with an M.S. in Geological Sciences. She immediately began her career in oil with Chevron in New Orleans working Deepwater Gulf of Mexico shallow hazards and pore pressure, and analysis and modeling for prestack depth migration and VSP design. In Houston she worked as the Jack/St. Malo Geophysicist, as Team Leader for the PSDM Velocity Modeling Services, and as the Geophysicist in Brazil Exploration. Jennifer has presented and published many papers on the practical applications of geophysics, and was the Guest Editor for the SEG’s The Leading Edge May 2010 issue on “Geophysical Uncertainty Characterization”.

GSH Technical Breakfast

Wednesday 8-Feb-2012 7:00 AM to 8:30 AM CST

Fugro Building

6100 Hillcroft Ste 100
Houston TX 77081
Google Maps | Hotels Near | Yahoo! Maps | Weather Forecast

GSH Technical Breakfast

Wednesday 8-Feb-2012 7:00 AM to 8:30 AM CST

 
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