Occurrence of organic matter-rich deposits (Middle Jurassic to Lower Cretaceous) from Qalikuh locality, Zagros Basin, South–West of Iran: A possible oil shale resource

Date

2015-4

Author

Rasouli, Ali
Shekarifard, Ali
Jalali Farahani, Farhang
Kök, Mustafa Verşan
Daryabandeh, Manouchehr
Rashidi, Mehrab

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Organic-rich deposits of Qalikuh locality, Zagros Basin, Southwest of Iran are unconventional hydrocarbon resources considered as an oil shale, which is hosted within a carbonate succession with the age range of Middle Jurassic to Lower Cretaceous. Leco carbon, Rock-Eval VI and modified Fischer Assay analysis were performed on some outcrop samples of these resources to investigate the occurrence of oil shale. In the studied samples, mean total organic carbon (TOC) is 17.3 wt.% and the average of petroleum genetic potential (S-1 + S-2) is 98 kg HC/t rock. Furthermore, TOC has direct relationship with petroleum genetic potential. Hydrogen index (HI)-T-max diagram indicates that the organic matter corresponds to Type II kerogen of probable marine origin with high quality of oil generation. According to Rock-Eval data, and bitumen reflectance (BRr), the samples are thermally early mature. Based on the studied samples, oil yield of the Qalikuh oil shales ranges from 6.1 to 7.9 wt.%. Mean oil-gas ratio is 2.7 and mean oil yield is 56.7 l/t rock. According to the observations, the production value of Qalikuh oil shale is more or less similar in the entire studied regions. Whereas the total production is below the expected values, the produced oil is considerably lighter (higher API) than that of most other known oil shales.

Subject Keywords

Rock-Eval VI, Bitumen reflectance (ERr), Modified fischer assay, Middle jurassic-lower cretaceous, Oil shale, İran

URI

https://hdl.handle.net/11511/28412

Journal

International Journal of Coal Geology

DOI

https://doi.org/10.1016/j.coal.2015.03.010

Collections

Department of Petroleum and Natural Gas Engineering, Article

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Citation Formats

A. Rasouli, A. Shekarifard, F. Jalali Farahani, M. V. Kök, M. Daryabandeh, and M. Rashidi, “Occurrence of organic matter-rich deposits (Middle Jurassic to Lower Cretaceous) from Qalikuh locality, Zagros Basin, South–West of Iran: A possible oil shale resource,” International Journal of Coal Geology, pp. 34–42, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/28412.