Sequence Stratigraphy of Kazhdumi Formation in the Azadegan Oil Field

Albian to Campanian sequences in the Zagros sedimentary basin is called the Bangenstan Group (as named after the Bangestan Mountain) and is composed of the Kazhdumi، Sarvak، Sorgah، and Ilam formations. Kazhdumi formation with the age of Albian is important due to having potential hydrocarbon generation in most of the Iranian oil fields. Based on facies variations and correlation with geophysical well log data، it is interpreted that the Kazhdumi formation in Azadegan oil field has been deposited in the carbonate ramp type in three sub-environments، including tidal flat، lagoon، and open marine. The sequence stratigraphic analysis of Kazhdumi formation shows that this interval consists of one depositional sequence. This depositional sequence contains three system tracts including LST، TST، and HST. Its lower and upper boundaries are erosional and gradational respectively.