B-41 ROCK PHYSICS DIAGNOSTIC IN SAND/SHALE SEQUENCE Abstract 1 The rock physics diagnostic is a procedure of establishing a rational effective-medium-based transform between the elastic and bulk properties of the sediment. A typical example of such transform is a porosity-impedance relation. Often the rock physics diagnostic allows the geoscientist to relate the elastic properties not only to the sediment bulk properties but also to its conditions such as effective pressure and saturation. The main purpose of the rock physics diagnostic is to derive reservoir properties and conditions from seismic data by e.g. directly applying a rock physics transform to an


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