An Introduction to Sequence Stratigraphy of AsmariFormation in Ramin Oil Field

Category Sedimentology
Group GSI.IR
Location 21th symposium on geosciences
Holding Date 24 May 2008

Abstract:
      The Oligo-Miocene Asmari Formation is a carbonate dominated succession deposited in the southern margin of NeotethysOcean (Zagros area).This study is part of a wider project that investigates the sequence stratigraphy and depositional environment of the Asmari Formation in Ramin Oil Field. Data from cores, cuttings and wireline logs are used for such a purpose. Using petrographic methods, five major microfacies (open marine, shoal/barrier, shelf lagoon, tidal flat and supratidal),four siliciclastic petrofacies, two mixed carbonate siliciclastic and one evaporate lithofacies are recognized. Due to vital role of stratal surfaces in sequence stratigraphy analysis, major charactristics for discrimination of MFS and SB are dicussed here.Using such charactristic,2 major sequence boundary, 3 minor types and 2 MFS are distinguished.On this basis, 3 sequences are determined within this formation which reflect a shallowing upward charactristics.

General:
     The Oligo-Miocene Asmari Formation is a carbonate dominated succession in the southern margin of NeotethysOcean (Zagros area). This study is part of a wider project that investigates the sequence stratigraphy and depositional environment of the Asmari Formation in Ramin Oil Field. Data from cores, cuttings and wireline logs are used for such a purpose. Using petrographic methods, five major microfacies (open marine, shoal/barrier, shelf lagoon, tidal flat and supratidal), four siliciclastic petrofacies, two mixed carbonate siliciclastic and one evaporate lithofacies are recognized. Due to vital role of stratal surfaces in sequence stratigraphy analysis, major charactristics for discrimination of MES and SB are dicussed here. Using such characteristic, 2 major sequence boundary, 3 minor types and 2 MES are distinguished. On this basis, 3 sequences determined within this formation which reflect a shallowing upward charactristics

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