Document Type : Original Research Paper


1 Department of Geology, Faculty of Science, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Department of Geology, Faculty of Earth Sciences, University of Damghan, Damghan, Iran


Identification of key sequence stratigraphic surfaces is a crucial task in geological characterization of hydrocarbon reservoirs. The uppermost Jurassic–lower Cretaceous carbonate successions of the Manifa member and Fahliyan Formation are as an important oil reservoir of Northwestern Persian Gulf. This study addresses the application of GR D-INPEFA curve to discriminate and correlate key stratigraphic surfaces and sequences of the studied carbonates in five wells a giant oil field of the Persian Gulf. To achieve this goal, identified key stratigraphic surfaces of core and thin sections were compared with interpretation of GR D-INPEFA curve. From sequence stratigraphic point of view and based on the results from geological studies, the Late Tithonian-Neocomian sequence has been discriminated into four third-order sequences which are described and interpreted. The top sequence boundary of the Manifa carbonate corresponds to a significant discontinuity that associated with evidence of karstification and distinct facies variation above and below this key surfaces. Based on the applied D-INPEFA curve, the identified sequence can be effectively discriminated and correlated in the field scale.


Main Subjects

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