Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Kinematic Analysis of Reservoir Horizons in the Oil Fields of Dezful Embayment

Document Type : Original Research Paper

Authors
Anita Torabi 1
Mohammad Reza Ghassemi 2
1 Exploration Management of Oil Continental Shelf Co., Tehran, Iran
2 Geological Survey of Iran, Tehran, Iran
Abstract
Dezful embayment located in southwest Iran is bounded to Bala-Rud flexure towards northwest,  Dezful  embayment   fault towards northeast, Mountain front fault towards north, and Zagros foredeep fault towards southwest. The embayment consists of thick sedimentary sequences of Mesozoic and Cenozoic time. The whole region is charecterised by intense structural depression. Structural analysis of five anticline reservoirs in Dezful embayment based on interpretation of seismic reflection profiles, and depth sections indicates: Based on dip isogons analysis, and relative competence of the layers, the  (competent) reservoir horizons such as Asmari, Sarvak, and Dariyan are of class 1B, while source and cap rock (incompetent) layers such as Pabdeh, Gurpi, and Garu are of class 1A and 1C. Regarding fault-fold relationship, there are fault-propagation  folds and fault-bend folds. The Haftkel structure is interpreted as antiformal stack; the Naft sefid structure is fault-bend fold;  the Parsi field is fault-propagation fold, and Mamatain and Karanj structures are possibly detachment folds.
Keywords
Dezful embayment
Bala-Rud fault
Zagros foreland
Competent
Antiformal stack
Detachment folds

Subjects

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Scientific Quarterly Journal of Geosciences
Volume 13, 51-52
Spring & Summer 2004, Vol. 13, No. 51-52
Summer 2004
Pages 2-11