We present the methodology and results that allowed conditioning the geological model in Siwa Field in Malaysia's Sarawak Basin using seismic-derived properties. Synergic integration of advanced petrophysical techniques, rock physics analysis/modeling, and seismic inversion, combined with a detailed structural modeling and depth conversion, allowed us to successfully incorporate the seismic-driven petrophysical properties and achieve a more complete description of the reservoir than could be done through conventional statistical techniques based on wells and seismic maps. The high structural and stratigraphic complexity, lack of shear-wave velocity information, and high levels of noise in the data represented the biggest challenges to deriving seismic properties based on amplitude variation for conditioning the reservoir model.

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