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Seismic reservoir description of the Barrosa Norte-El Triángulo fields, Argentina, using hybrid seismic inversionNormal access

Authors: M. Benabentos, J. Perdomo, S. Mallick, E. Sanchez, L. Pianelli and C. Saavedra2
Event name: Geophysics of the 21st Century - The Leap into the Future
Session: Seismic inversion and pattern analysis
Publication date: 01 September 2003
Organisations: SEG, EAGE
Language: English
Info: Extended abstract, PDF ( 847.56Kb )
Price: € 20

The gas-bearing sands in the Barrosa Norte-El Triángulo field, Argentina are characterized by highamplitude
bright-spots on the stacked seismic data, and these anomalies have traditionally been used to
locate drilling sites. Drilling through these bright-spots has resulted in some pay and many dry wells.
Because the seismic reflection amplitudes are dependent on thickness, lithology, and porosity besides fluid
content, using bright-spots alone is ambiguous in detecting hydrocarbon sands from stacked seismic data.
To resolve the ambiguity, we use a 3D hybrid seismic inversion. This inversion provided a detailed and
accurate estimate of elastic earth properties, which were then used to calculate porosity and water
saturation maps for the reservoir.

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