Abstract
The presence of non-interactive porosities of spherical or near-spherical type along with microporosity changes the effective elastic properties of the rock frame making pore geometries an important parameter, that must be taken in to account for estimating elastic moduli by any theoretical effective medium models. Differential effective medium (DEM) model is one such theoretical model which accounts for changes in elastic moduli due to changing pore geometries and facilitates inclusion of two or more than two pore shapes. If bulk porosity and water-saturated P-wave velocities are available, one can estimate the average aspect ratio of the different pore shapes and their relative volume fraction in the rock. These two parameters when used in DEM will predict dry rock moduli and shear velocities. An example on 52 measured carbonate rock samples is shown, in the end.
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