Somayeh Pakparvar - Ph.D. Student of sedimentology, Islamic Azad University of Tehran North branch
Masood Lot pour - Head of geological study, Tehran Energy Consultant (TEC)
Artabaz Adhamian - Petroleum Engineering and Development Company

Sarvak Formation (Albian - Thoronian) as main reservoir in the field is one of the carbonate units of Bangestan Group in Zagros Basin with average thickness of 640m. This Formation conformably overlay Kakhdumi Formation while the upper boundary is erosional with IlamFormation. There is significant lateral and vertical heterogeneity in the reservoir layers causes main challenge in reservoir characterization. In this paper, reservoir properties evaluation and construction of depositional model have been done based on lithotype study, sedimentaryenvironment classification, petrophysical interpretations and seisworks. 5 facies types (lithotypes) in the Sarvak formation with particular rock properties are identified in 8 wells and 200 thin sections. The main facies association elements and relevant depositional settings havebeen interpreted by extracted Paleolog, facies and fossil association data, which are related to depositional setting variations

lithotype, heterogeneity, Paleolog, Depositional System