Sequence Stratigraphy & Paleogeography of the Oligo - Miocene Asmari Formation in the Northeastern of Dezful Embayment & South of Lorestan Basin SW Iran

Abstract

The Asmari Formation is mainly consisted of a carbonate unit, dating Oligocene – Early Miocene in age. It is one of the most important hydrocarbon reservoirs in the Zagros Baisin. Facies changes of Asmari Formation, caused by eustatic sea level fluctuations & tectonic movement, could be a place of stratigraphical trap. The purpose of this study is recognizing of paleogeography of the Asmari Formation in northeastern of Dezful Embayment & south of Lorestan Baisin. For this purpose, cutting, sonic, electronical & gamma logs of three subsurfaces sections, Chenareh & Kaseh Mast were studied. Field & microscopic observation indicated that facies of Asmari Formation belongs to rimmed shelf & changed in to sedimentary carbonate ramp during Aquitanian. In this time, Kalhur Evaporate Member deposited during low sea level that suggesting of disconnection of Asmari basin from open marine.                      

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منابع
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