Ratio-based rock physics templates can be a valuable tool for evaluating existing deep reading acoustic and resistivity logging while drilling measurements; improving navigation, well placement and for identifying formation boundaries and fluid contacts.

A study of more than 30 wells from the Norwegian Continental Shelf integrating the deep reading resistivity, acoustic and seismic logging while drilling measurements has been completed to investigate and evaluate the resistivity and acoustic impedance behavior across reservoir-caprock boundaries and fluid contacts within the reservoir. Different lithologies from different stratigraphic levels have been incorporated in the study.

Resistivity ratio and acoustic impedance ratio based rock physics templates have been created with this data, across the reservoirs and caprocks, which honour all the resistivity and acoustic impedance-controlling factors.

Results show that there are useable trends regarding reservoir properties in these rock physics templates of acoustic impedance and resistivity in the caprocks and water-bearing parts of the reservoir templates.


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    [2005] Quantitative Seismic Interpretation - Applying RockPhysics Tools to Reduce Interpretation Risk. Cambridge University Press.
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