oa Regional Unconformities in the Cenomanian and Turonian Limestone of Southwest Iran (Sarvak Formation) - Sub-aerial Exposures, Diagenetic Patterns & Impact on Reservoir Properties

The Cenomanian/Turonian shallow water deposits of the Sarvak Formation constitute one of the main reservoirs in SW Iran. Heterogeneities in these reservoirs are controlled by lateral facies changes, caused by intrashelf basin to platform transitions, and by diagenetic overprint related to three (regional) exposure surfaces that subdivide the succession in third order depositional sequences. This diagenetic imprint has been studied in superb exposures of this formation in the outcrops of coastal Fars, which are considered as good outcrop analogues for the nearby oilfields.