Rock properties of unconventional gas shales such as porosity, pore shape distribution, and lithology are important for the interpretation of seismic data amplitude variations. The study presented here estimated these rock properties at the seismic scale by applying rock-physics modelling, grid searching, and prestack seismic inversion, using the Haynesville Shale as a case study. This seismic reservoir characterization procedure accounted for the complex composition, pore shape distribution, and anisotropy. All the above rock properties affected the seismic velocities, and the combined effects of these rock properties on the seismic amplitude were investigated simultaneously. The P-impedance depended primarily on porosity, whereas the Vp/Vs correlated with the pore shape distribution and lithology, particularly the clay content. The estimated rock properties at the seismic scale were validated further through the comparisons between the elastic properties derived from the estimated rock properties and the ones inverted from the prestack seismic data.


Article metrics loading...

Loading full text...

Full text loading...


  1. Berryman, J.
    [1980] Long-wavelength propagation in composite elastic media I. Spherical inclusions. Journal of the Acoustical Society of America, 68, 1809–1819.
    [Google Scholar]
  2. Chapman, M.
    [2003] Frequency-dependent anisotropy due to meso-scale fractures in the presence of equant porosity. Geophysical Prospecting, 51, 369–379.
    [Google Scholar]
  3. Hammes, U., Hamlin, H. S. and Thomas, E. E.
    [2011] Geologic analysis of the Upper Jurassic Haynesville Shale in east Texas and west Louisiana. AAPG Bulletin, 95, 1643–1666.
    [Google Scholar]
  4. Jiang, M. and Spikes, K. T.
    [2013a] Estimation of reservoir properties of the Haynesville Shale by using rock physics modelling and grid searching. Geophysical Journal International, 195, 315–329.
    [Google Scholar]
  5. [2013b] Correlation between rock properties and spatial variations in seismic attributes for unconventional gas shales – a case study on the Haynesville Shale. SEG Technical Program Expanded Abstracts, http://dx.doi.org/10.1190/segam2013-0187.1.
    [Google Scholar]
  6. O’Connell, R. and Budiansky, B.
    [1974] Seismic velocities in dry and saturated crack solids. Journal of Geophysical Research, 79, 5412–5426.
    [Google Scholar]
  7. Wang, F. P. and Hammes, U.
    [2010] Effects of reservoir factors on Haynesville fluid flow and production. World Oil, 231, D3–D6.
    [Google Scholar]

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