Microfacies and Sedimentary Environment of the Asmari Formation in Lali Oil Field (NW Masjed-e-Soleyman)

The Oligocene-Miocene Asmari Formation is a thick sequence of carbonate rocks in the Zagros basin. The Formation has been studied in Lali oilfield, which locates at 40 kilometers of south-west Masjed-e-Soleyman. It lacks the Lower Asmari but involves the Kalhur Member and Basal Anhydrite at that area. The study of the Asmari thin sections from available cores and cuttings at wells no. 20 and 22 of Lali oilfield, led to recognize 10 microfacies, related to six facies zone, including: supratidal, intertidal, shelf lagoon, barrier or shoal, shallow open marine and basin margin. The Asmari Formation represents sedimentation on a homoclinal carbonate ramp.