The Grain-size Characteristics of Sedimentary Reservoir in Tanan Depression

Based on the grain-size data of reservoir rock in Tanan depression, the decomposition maps of grain-size population model are derived from grain-size sub-population separate technical method, meanwhile "mixed population model classification as well as the model identification software system" are applied to set up the method of grain-size population characteristics and the standards of depositional grain-size environment mode. Based on all these research results, the grain-size indicators of reservoir depositional environment have been studied in Tanan depression, and depositional environment been identified from these mixed distribution models.