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Tectonic Controls on Development of the Zagros: Implications for Hydrocarbon Systems
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Third EAGE Workshop on Iraq, Nov 2015, Volume 2015, p.1 - 5
Abstract
The main tectonic controls on the development of structural traps and fractured reservoirs include: the oblique (transpressional) collision between Arabia and Eurasia; the mechanical stratigraphy of the Palaeozoic cover sequence; and the effects of structural inheritance. Partitioning of transpressional deformation has caused localisation of strike-slip (or oblique-slip) into complex fault zones oriented oblique to the Zagros trend. The alternating sequence of mechanically strong carbonates and weak evaporites and shales has a major effect on trap geometry and complexity. Structural inheritance is interpreted to have played a critical role during the right-lateral reactivation of basement faults to form many of the giant fields in southern Iraq.