1887

Abstract

Summary

Observations of seismic anisotropy in field seismic data are often used to infer fracture properties in the subsurface. To understand if anisotropic elastic parameters can be measured following extensive seismic processing and migration we created a field scale elastic finite difference model simulating a 4-component ocean bottom seismic dataset. The model was built with realistic geological sequences in the overburden and HTI reservoir compartments. Each HTI compartment had different fracture properties (e.g. fracture azimuth and density). Following industry standard methods for denoise and migration we ran post-migration azimuthal velocity and AVOA analysis. Our results find that azimuthal velocities are robust to seismic processing and we appear to be able to measure the input elastic model HTI δ parameter along with the fracture azimuth direction with a reasonable degree of accuracy. Measurements of AVOA are less successful in comparison. Phi azimuth angles compare fairly well with the input model, however the azimuthal anisotropic gradient term shows a poor correlation with the input model.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201801061
2018-06-11
2024-03-29
Loading full text...

Full text loading...

References

  1. Etgen, J. and L’Heureux, E.
    [2013]. Numerical construction of detailed stratigraphic model for seismic modeling. 75th EAGE Conference and Exhibition, Extended Abstracts.
    [Google Scholar]
  2. Grechka, V., Tsvankin, I. and Cohen, J.K.
    [1999]. Generalized Dix equation and analytic treatment of normal-moveout velocity for anisotropic media. Geophysical Prospecting, 47 (2), 117–148.
    [Google Scholar]
  3. Jenner, E.
    [2002]. Azimuthal AVO: Methodology and data examples. The Leading Edge, 21 (8), 782–786.
    [Google Scholar]
  4. L’Heureux, E. and Etgen, J.
    [2013]. Building better models for seismic simulations with stochastic stratigraphy. 83rd SEG Annual Conference, Expanded Abstracts, 3320–3323.
    [Google Scholar]
  5. Rüger, A.
    [1997]. P-wave reflection coefficients for transversely isotropic models with vertical and horizontal axis of symmetry. Geophysics, 62 (3), 713–722.
    [Google Scholar]
  6. Rüger, A. and Tsvankin, I.
    [1997]. Using AVO for fracture detection: Analytic basis and practical solutions. The Leading Edge, 16 (10), 1429–1434.
    [Google Scholar]
  7. Tsvankin, I.
    [1997]. Reflection moveout and parameter estimation for horizontal transverse isotropy. Geophysics, 62 (2), 614–629.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801061
Loading
/content/papers/10.3997/2214-4609.201801061
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error