KOPEH DAGH BLOCKS
E&P BLOCKS OF IRAN
The Kopeh Dagh Ranges which extends along the border area between Iran and Turkmenistan forms a linear mountain range separating the stable Turan Block in north and Central Iran in the South. NIOC is offering 3 blocks in this area.
Sarakhs and Dousti Blocks are situated in the foothills of the Kopeh Dagh ranges as a part of the Amu Darya Basin. The Kopeh Dagh and Amu-Darya basins in the south of Turkmenistan formed during a post- collisional rifting event with the progressive and unconformable deposition of Middle Jurassic rocks over the basement. The main inversion of the Kopeh Dagh occurred at Late Eocene time, when the far field deformation developed in Eurasia as a consequence of the locking of the Neo-Tethys subduction.
Raz Block is situated in the Kopeh Dagh Ranges dominated by large – medium size anticlines which exposed in the surface and can be defined by surface geology.
|The Middle Jurassic Kashafrud (Eastern Kopeh Dagh & Shemshak Formations (Western Kopeh Dagh) consisting of shale, siltstone and sandstone) is considered as the main source rocks in Kopeh Dagh Basin. The Upper Jurassic carbonates of Mozduran Formation and Lower Cretaceous clastics of Shurijeh Formation are the main reservoirs of Kopeh Dagh Basin. The evaporite intercalations of Shurijeh Formation (Berriasian) as well as siltstone and marly beds of Sarcheshmeh Formation (Baremian – Aptian) serve as the seal role for the reservoirs.Towards the Western Kopeh Dagh, the Shurijeh Formation is replaced by marls and sandstones of Zard Formation
Totally ten structural traps have been identified in Kopeh Dagh Blocks. Moreover, stratigraphic traps also would be expected in Sarakhs Plain. Giant Khangiran and Gonbadli producing gas fields are situated adjacent to Sarakhs and Dousti blocks.
AVAILABLE GEOPHYSICAL DATA