We propose a new attribute known as Anisotropic Extended Elastic Impedance (AEEI). AEEI, can be calculated in various azimuths, but the most significant azimuths for calculation, are across fractures (AEEI, for = 0 Deg. in example model) and parallel to fractures (EEI for = 90 Deg. in the example model). The Factor A has the seismic anisotropy information, which modifies the Extended Elastic Impedance (EEI), for anisotropic reservoirs such as fractured plays. AEEI, parallel to fractures reduce to EEI. The attribute can be easily inverted and be used for Fracture characterization. We demonstrate this with Horizontal Transverse Isotropy (HTI) models, simulating fractured reservoirs with fluid fill in the cracks. The separation of anisotropic Factor A and EEI terms in the AEEI, where AEEI is a product of those two terms, allows us to input Factor A, extracted from azimuthal seismic data or use modelling to calculate A. The other term EEI, can be inverted from regular full fold seismic data. Therefore, AEEI allows to analyze the reservoir, in situations where either there is no azimuthal seismic data or is noisy, has low azimuthal fold and not suitable for azimuthal amplitude analysis.


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  1. Avseth, P., Mukerji, T., Mavko, G.
    , 2005. Quantitative Seismic Interpretation, Cambridge University Press, 248–251.
    [Google Scholar]
  2. Connolly, P.
    , 1999. Elastic Impedance, The Leading Edge, April, 1999, 438–452.
    [Google Scholar]
  3. Hudson, J. A.
    , 1980. Overall properties of a cracked solid. Math. Proc. Camb. Phil. Soc., 88, 371–384.
    [Google Scholar]
  4. , 1981. Wave speeds and attenuation of elastic waves in material containing cracks, Geophys. J. R. Astron. Soc.64, 133–150.
    [Google Scholar]
  5. Martins, J.L.
    , 2006. Elastic Impedance in weakly anisotropic media, Geophysics, 71, D73–D83.
    [Google Scholar]
  6. Ruger, A.
    , 1998. Variation of P-wave reflectivity with offset and azimuth in anisotropic media, Geophysics, 63, 935–947.
    [Google Scholar]
  7. Whitcombe, D.N., Connolly, P., Reagan, R.L., Redshaw, T. C.
    , 2002. Extended Elastic Impedance for lithology and fluid prediction, Geophysics, 67, 63–67.
    [Google Scholar]

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