Abstract: Described herein are embodiments of a method for generating a refined depofacies classification corresponding to a subsurface reservoir. The method includes analyzing a plurality of rock cores obtained from a plurality of wells drilled in the reservoir or field, analyzing a plurality of well logs comprising a plurality of different well log types obtained from the plurality of wells, and determining an initial depofacies classification for at least portions of the oil or gas reservoir or field. It is then determined whether at least one diagenetic, heavy, light or anomalous mineral is present in some of the analyzed rock cores, and if so, whether at least one well log type from among the plurality of different well log types is capable of substantially accurately identifying the presence of the mineral present. The initial depofacies classification is re-analyzed and reclassified to produce a refined depofacies classification.