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A Two Dimensional Basin and Petroleum System Modeling in Coastal Fars Area of South Zagros, Iran
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Saint Petersburg 2018, Apr 2018, Volume 2018, p.1 - 5
Abstract
This modelling study attempted to quantify the processes of hydrocarbon (HC) generation, expulsion and migration along a regional section (NW-SE) in the South Zagros Basin of Southern Iran. The studied area called “Coastal Fars” is one of the most prominent hydrocarbon areas in Iran but bears high exploration uncertainties caused by the complex structures, presence of multiple possible source layers and manifold migration pathways. Since 1970 increasing number of gas accumulations have been discovered in Permo-Triassic siliciclastic and carbonates in the Faraghan, Dalan, and Kangan formations in Iran coastal areas. Data gathered from five production wells were used for this study. Sarchahan Formation as a part of a widespread Paleozoic shelf system extending across northern Gondowana, is the main generating source rock in studied area which has been generated large amounts of oil and gas for various Paleozoic and Triassic stratigraphic units. Sarchahan reached maximum burial depth in Pleistocene which maximum burial depth is greater in eastern wells. Latest uplift in western portion of studied area started earlier than other parts. Greater burial depth caused greater volumes of hydrocarbon generation in eastern wells. Expulsion of Hydrocarbons happens almost simultaneously in all wells.