Types and modeling of intercalation in alluvial fan reservoir - A case study of Guantao Formation in the Du 84 Block, Shu-1 area, Western Sag of Liaohe Depression

摘要

The Western Depression of the Liaohe Basin is the major exploration area of the Liaohe Oilfield, and the production formation of Guantao in Du84 block of the Shu-1 area contains extra heavy oil with a depth of 530-640m. Steam Assisted Gravity Drainage (SAGD) method had been applied to the development of heavy oil. The distribution of intercalations has great influence on the expansion of steam chamber during SAGD development, based on the cores, two types of intercalations (muddy intercalation and physical property intercalation) were identified, and in combination of well log suits, intercalation's log response templates were built. In order to ensure optimal hydrocarbon recovery and sustain production, cores, log curves and other relevant data were collected for building fine reservoir model, with the constraints of sedimentary microfacies, dense well log interpretation results, the model are suitable for characterizing the heterogeneity of the reservoir.