pISSN 0705-3797 eISSN 2586-1298
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Episodes 2023; 46(3): 361-374

Published online September 1, 2023


Copyright © International Union of Geological Sciences.

Investigating for hydrocarbon potential in the Sarvak and Ilam Formations using Fuzzy logic in the Fars Region, Iran

Mehdi Hosseinpour1, Mehran Arian1*, Zahra Maleki1, Manochehr Qorashi2

1Department of Earth Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
2Research Institute for Earth Sciences, Geological Survey of Iran, Tehran, Iran

Correspondence to:*E-mail: mehranarian@yahoo.com

Received: May 24, 2022; Revised: September 8, 2022; Accepted: September 8, 2022

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


The Sarvak and Ilam Formations in the Zagros sedimentary basin are known as reservoir ROCKs. Over 50 hydrocarbon fields are in the Zagros basin at the Sarvak and Ilam hydrocarbon Formations, and the Fars region is about 5%. This research identifies areas with hydrocarbon potential of the Formation of Sarvak and Ilam at Fars area parameters such as Formations outcrop, main faults, isopach maps, and volume of upper Formations sediments extracted from geology map of the area. With fuzzification of the layers and overlapping them with each other, the areas with high hydrocarbon potential were identified in the Ilam and Sarvak Formations. Regarding exploration potential in the Sarvak and Ilam Formations, the Fars region was identified as an area with poor hydrocarbon potential. Somehow 75.25% of the Fars area has inferior hydrocarbon potential, 18.5% has standard hydrocarbon potential, and only 6.25% has high hydrocarbons potential for exploration at the Sarvak and Ilam Formations. While considering to fault effect and their outcrops, the percent of areas with high hydrocarbon potential decreased to 3.6%. Also, Fuzzy logic as a multi-value logic from masters knowledge and designed inference network could identify all fields with hydrocarbons potential in the Sarvak and Ilam Formations in the Fars area and recognize those areas as a high hydrocarbons potential.