1887

Abstract

Summary

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.

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/content/papers/10.3997/2214-4609.20141209
2014-06-16
2020-05-28
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