1887
24th International Geophysical Conference and Exhibition – Geophysics and Geology Together for Discovery
  • ISSN: 2202-0586
  • E-ISSN:

Abstract

Presence of oriented stresses and fractures in the subsurface can pose significant challenge when imaging wide-azimuth and multi-azimuth data using transverse isotropy as an approximation to describe the medium. We describe the key components of an orthorhombic model-building and updating workflow for depth imaging in areas affected by stress. We discuss several different options for deriving the initial parameters describing orthorhombic medium and their dependencies on the geometry of the available seismic data.

We demonstrate the effectiveness of the workflow on real data from the Gulf of Mexico.Compared to transversely isotropic imaging, the orthorhombic imaging flattens the common-image-point gathers in all azimuths and results in improvements of image focussing.

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/content/journals/10.1071/ASEG2015ab082
2015-12-01
2026-01-17
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References

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/content/journals/10.1071/ASEG2015ab082
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  • Article Type: Research Article
Keyword(s): Anisotropy; Depth Imaging; Geomechanical modelling; Orthorhombic; Transverse Isotropy
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