Simultaneous AI-SI Inversion and N/G Computation
The AI-SI templates and their benefits in prestack inversion of sand/shale sequences are exemplified in Chapter 5. Marked mismatches in frequency content between seismic data and log data result in large differences in vertical resolution and lead to the argument that limitations exist in our ability to directly invert for certain reservoir properties (e.g., porosity and permeability) in highly heterogeneous sand and sandstone reservoirs. However, another valuable reservoir parameter — the net-to-gross thickness ratio — lends itself to fairly accurate estimations from seismic inversion in many cases.
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Seismic Petrophysics in Quantitative Interpretation
Seismic Petrophysics in Quantitative Interpretation is written for oil and gas industry professionals and academicians who are concerned with the use of seismic data in petroleum exploration and production. In addition, it should prove useful toward thoughtful applications of those data by geotechnical engineers. Seismic interpretation can be made simple and robust by integrating rock-physics principles with the seismic and petrophysical attributes that bear on the properties of conventional reservoirs (thickness, net/gross, lithology, porosity, permeability, and satu-ration) and of unconventional reservoirs (thickness, lithology, organic richness, and thermal maturity). Practical solutions can be used to address existing interpretation problems in rock-physics-based AVO analysis and prestack seismic inversion in order to streamline the workflows in subsurface characterization.