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Article

Comprehensive Petrophysical Assessment of Carbonate Reservoirs in the Shanul Gas Field (SW Iran): A Case Study with Implications for Hydrocarbon Exploration and Production

by
Pariya Zendehdel
1,
Amir Karimian Torghabeh
1,2,3,*,
Hossein Jowkar
4 and
Nuno Pimentel
5,*
1
Department of Earth Sciences, Faculty of Sciences, Shiraz University, Shiraz 84334-71946, Iran
2
Fossil Energy Technologies Development Research Center, Shiraz University, Shiraz 84334-71946, Iran
3
Geology Group, Faculty of Science, Ferdowsi University of Mashhad, Mashhad 91779-48974, Iran
4
South Zagros Oil and Gas Company, Shiraz 71357-13113, Iran
5
Instituto Dom Luiz (IDL), Faculty of Sciences, Lisbon University, 1749-016 Lisboa, Portugal
*
Authors to whom correspondence should be addressed.
Fuels 2025, 6(4), 77; https://doi.org/10.3390/fuels6040077
Submission received: 8 May 2025 / Revised: 7 July 2025 / Accepted: 15 September 2025 / Published: 6 October 2025
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Abstract

This study presents an integrated petrophysical workflow for the comprehensive characterization of the Upper Dalan and Kangan carbonate gas reservoirs in the Shanul Field, southwest Iran. By combining advanced cross-plot techniques (including M-N, MID, and RHOma-Uma plots) with probabilistic porosity modeling calibrated to core data, this work achieves a higher-resolution discrimination of lithology and more robust estimation of fluid properties compared to conventional single-log approaches. The results reveal significant heterogeneity within both formations but demonstrate the superior reservoir quality of the Upper Dalan, particularly within the UD2 subzone, and in the Ka-2a subzone of the Kangan. The improved workflow enables more accurate zonation and identification of high-quality, productive intervals, supporting optimized field development strategies. These findings provide methodological advances for challenging and heterogeneous carbonate systems, offering a reference framework for similar reservoirs in the Zagros Basin and beyond.
Keywords: Kangan formation; Upper Dalan formation; permeability; porosity; shale volume; water saturation; pay summary Kangan formation; Upper Dalan formation; permeability; porosity; shale volume; water saturation; pay summary

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MDPI and ACS Style

Zendehdel, P.; Karimian Torghabeh, A.; Jowkar, H.; Pimentel, N. Comprehensive Petrophysical Assessment of Carbonate Reservoirs in the Shanul Gas Field (SW Iran): A Case Study with Implications for Hydrocarbon Exploration and Production. Fuels 2025, 6, 77. https://doi.org/10.3390/fuels6040077

AMA Style

Zendehdel P, Karimian Torghabeh A, Jowkar H, Pimentel N. Comprehensive Petrophysical Assessment of Carbonate Reservoirs in the Shanul Gas Field (SW Iran): A Case Study with Implications for Hydrocarbon Exploration and Production. Fuels. 2025; 6(4):77. https://doi.org/10.3390/fuels6040077

Chicago/Turabian Style

Zendehdel, Pariya, Amir Karimian Torghabeh, Hossein Jowkar, and Nuno Pimentel. 2025. "Comprehensive Petrophysical Assessment of Carbonate Reservoirs in the Shanul Gas Field (SW Iran): A Case Study with Implications for Hydrocarbon Exploration and Production" Fuels 6, no. 4: 77. https://doi.org/10.3390/fuels6040077

APA Style

Zendehdel, P., Karimian Torghabeh, A., Jowkar, H., & Pimentel, N. (2025). Comprehensive Petrophysical Assessment of Carbonate Reservoirs in the Shanul Gas Field (SW Iran): A Case Study with Implications for Hydrocarbon Exploration and Production. Fuels, 6(4), 77. https://doi.org/10.3390/fuels6040077

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