Monoclinic AVAz inversion

Edan Gofer*, Scott Leaney

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


Amplitude variation with azimuth (AVAz) inversion of wide-azimuth surface seismic data is essential for characterizing fractured reservoirs that cover large areas. It estimates the elastic properties of the in-situ rock and can be used to derive fracture properties and stress anisotropy, both important for considerations related to field development and production. A fractured reservoir may have multiple vertical fracture sets and, as a result, the rock's elastic symmetry may be monoclinic. Thus, AVAz inversions based on reflectivity equations associated with higher symmetries will not be valid. Herein, we introduce monoclinic AVAz inversion and demonstrate it on a synthetic example based on the SEG advanced modeling program Phase II model.

Original languageEnglish
Pages (from-to)275-279
Number of pages5
JournalSEG Technical Program Expanded Abstracts
StatePublished - 2020
Externally publishedYes
EventSociety of Exploration Geophysicists International Exhibition and 90th Annual Meeting, SEG 2020 - Virtual, Online
Duration: 11 Oct 202016 Oct 2020


  • Anisotropy
  • Fractures
  • Reservoir characterization


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