Abstract
The Amu Darya Basin is a highly productive petroleum province in Turkmenistan and Uzbekistan, extending southward to Iran and Afghanistan. The Eastern KopetDagh region considered as an important hydrocarbon province seated in NE of Iran and southern part of the Amu-Darya Basin. The Late Triassic-Jurassic extensional tectonic produced a domino-type half-graben/tilted-block system, with more than 9 km thickness of the syn to post-rift sediments (Late Triassic- Present Day), as measured in the giant Gonbadly-Khangiran gas fields. The Gonbadly and Khangiran structures were formed by Paleocene-Present Day oblique inversions of the Jurassic half grabens above the Mid Jurassic Kashafrud Formation, which is the main detachment in this region. The sequence stratigraphy of the Mid-Jurassic Kashafrud Formation, derived from the marginal fault scarps, depends on the balance between uplift and erosion rates in the basin margins. The attribute study and unsupervised sequence stratigraphy represent Northeastward channel-lobe systems in Low Stand System Tracts, associated levees and overbank areas on the slope to the basin floor fans. The result of this research leads to explore a sort of complex (structural and stratigraphic) traps in the syn-rift sediments as a new potential hydrocarbon system in KopetDagh basin.
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