Applied Sedimentology

Applied Sedimentology

Integration of facies, diagenetic, and sequence stratigraphic studies in reconstructing the stratigraphic architecture of the Bangestan reservoir in the Hengam Field, eastern Persian Gulf

Author
Assist. Prof., Dept., of Petroleum Exploration, School of Mining Engineering, University of Tehran, Tehran, Iran
Abstract
The Sarvak and Ilam formations constitute the main reservoir rocks of the Hengam Field at the easternmost part of the Persian Gulf. In this field, the Sarvak Formation exhibits variable thickness and comprises the Mauddud, Ahmadi, and Mishrif members. Facies analysis from one of the cored wells indicates that the Late Albian Mauddud Member was deposited in a carbonate platform different from the Mishrif member. The Ilam Formation consists of three facies, which were deposited in a shoal-lagoon complex. Petrographic studies reveal that the identified facies underwent post-depositional diagenetic processes, including marine, meteoric, and burial diagenesis. The impact and intensity of meteoric diagenesis played a significant role in porosity development and distribution in the upper part of the Mauddud and Mishrif members, and the Ilam Formation. Sequence stratigraphic analysis led to the identification of four third-order depositional sequences within this reservoir. The first depositional sequence corresponds to the Mauddud Member, while the second and third depositional sequences align with the Ahmadi and Mishrif members. The third depositional sequence is identified only in the central wells of the field, while it is absent in the northern and southern wells. The study results suggest that during the compressional regime of the mid-Cretaceous and the uplift of fault blocks, the entire third depositional sequence and part of the second depositional sequence were removed due to subaerial exposure and erosion following the post-Cenomanian to post-Turonian events in the northern and southern wells, whereas they were preserved in the central wells.
Keywords

Adabi, M. H., Mehmandosti, E. A (2008) Microfacies and geochemistry of the Ilam Formation in the Tang-E Rashid area, Izeh, S.W. Iran. Journal of Asian Earth Sciences. 33(3): 267-277. https://doi.org/https://doi.org/10.1016/j.jseaes.2008.01.002.
 
Alavi, M (2004) Regional stratigraphy of the Zagros fold-thrust belt of Iran and its proforeland evolution. American Journal of Science. 304: 1-20.
Ali, M. Y., Watts, A. B. and Farid, A (2014) Gravity anomalies of the United Arab Emirates: Implications for basement structures and infra-Cambrian salt distribution. GeoArabia. 19(1): 85-112.
Alsharhan, A. S (1989) Petroleum geology of the United Arab Emirates. Journal of Petroleum Geology. 12: 253-288.
Alsharhan, A. S. and Nairn, A. E. M (1997) Sedimentary basins and petroleum geology of the Middle East. Elsevier. Amsterdam. 878 p.
Alsharhan, A. S (2014) Petroleum Systems in the Middle East. In: Rollinson, H. R., Searle, M. P., Abbasi, A. I., Al-Lazki, A. I. and Al Kindi, M. H., Eds., Tectonic Evolution of the Oman Mountains. Geological Society. London. Special Publications, 392: 361-408. https://doi.org/10.1144/sp392.19.
Aqrawi, A. A. M., Thehni, G. A., Sherwani, G. H., Kareem, B. M. A (1998) Mid-Cretaceous rudist-bearing carbonates of the Mishrif Formation: an important reservoir sequence in the Mesopotamian Basin, Iraq. Journal of Petroleum Geology, 21: 57–82
Assadi, A., Honarmand, J., Moallemi, S. A (2016) Depositional environments and sequence stratigraphy of the Sarvak Formation in an oil field in the Abadan Plain, SW Iran. Facies 62: 26. https://doi.org/10.1007/s10347-016-0477-5
Assadi, A., Honarmand, J., Moallemi, S. A (2022) Impacts of Depositional Facies and Diagenesis on Reservoir Quality: A Case Study from the Rudist-bearing Sarvak Formation, Abadan Plain, SW Iran. Acta Geologica Sinica - English Edition, 97: 190-206. https://doi.org/10.1111/1755-6724.14984.
Bordenave, M. L., Hegre, J. A (2010) Current distribution of oil and gas fields in the Zagros Fold Belt of Iran and contiguous offshore as the result of the petroleum systems. Journal of Petroleum Geology, 330: 291-353. https://doi.org/10.1144/SP330.14
Burchette, T. P., and Britton, S. R (1985) Carbonate facies analysis in the exploration for hydrocarbons" A case study from the Cretaceous of the Middle East, in Brenchley, P. J., and Williams, B. P. J., eds., Sedimentology recent developments and applied aspects. Blackwell Scientific Publications, Geological Society. London, 311-338.
Esfandyari, M., Mohseni, H., Heidari, M (2023) Facies analysis, depositional sequences and platform evolution of the Sarvak Formation (late Albian-Turonian) in the Zagros Basin, West of Iran. Journal of African Earth Sciences. 198: 104811.
Esrafili-Dizaji, B., Rahimpour-Bonab, H., Mehrabi, H., Afshin, S., Kiani Harchegani, F. and Shahverdi, N (2015) Characterization of rudist-dominated units as potential reservoirs in the middle Cretaceous Sarvak Formation, SW Iran. Facies, 61: 14. https://doi.org/10.1007/s10347-015-0442-8.
Flügel, E (2004) Microfacies of carbonate rocks. Springer. Berlin Heidelberg. New York. 976 p.
Ghabeishavi, A., Vaziri-Moghaddam, H., Taheri, A., Taati, F (2010). Microfacies and depositional environment of the Cenomanian of the Bangestan anticline, SW Iran. Journal of Asian Earth Sciences, 37 (3): 275-285. https://doi.org/https://doi.org/10.1016/j.jseaes.2009.08.014.
Gholami Zadeh, P., Adabi, M. H., Sadeghi, A (2019) Microfacies, geochemistry and sequence stratigraphy of the Sarvak Formation (Mid Cretaceous) in the Kuh-e Siah and Kuh-e Mond, Fars area, southern Iran. Journal of African Earth Sciences, 160: 103634.
Ghazban, F (2007) Petroleum geology of the Persian Gulf. Tehran University. 717p.
Hajikazemi, E., Al-Aasm, I. S., Coniglio, M (2010) Subaerial exposure and meteoric diagenesis of the Cenomanian-Turonian Upper Sarvak Formation, southwestern Iran. Journal of Petroleum Geology, 330: 253-272. https://doi.org/10.1144/SP330.12.
Hajikazemi, E., Al-Aasm, I. S., Coniglio, M (2017) Diagenetic history and reservoir properties of the Cenomanian-Turonian carbonates in southwestern Iran and the Persian Gulf. Marine and Petroleum Geology, 88: 845-857.
James, G. A. and Wynd, J. G (1965) Stratigraphic Nomenclature of the Iranian oil consortium agreement Area. AAPG, 49: 2182-2245
Kalanat, B., Vaziri-Moghaddam, H. Bijani, S (2021) Depositional history of the uppermost Albian–Turonian Sarvak Formation in the Izeh Zone (SW Iran). International Journal of Earth Science, 110: 305–330.
Lenoir, L., Blaise, T., Somogyi, A., Brigaud, B., Barbarand, J., Boukari, C., Nouet, J., Brézard-Oudot, A., & Pagel, M (2021) Uranium incorporation in fluorite and exploration of U–Pb dating. Geochronology, 3(1): 199-227. https://doi.org/10.5194/gchron-3-199-2021.
Mehrabi, H., Rahimpour-Bonab, H., Enayati-Bidgoli, A. H (2014) Depositional environment and sequence stratigraphy of the Upper Cretaceous Ilam Formation in central and southern parts of the Dezful Embayment, SW Iran. Carbonates Evaporites, 29: 263–278. https://doi.org/10.1007/s13146-013-0168-z.
Mehrabi, H., Navidtalab, A., Enayati, A., Bagherpour, B (2022) Age, duration, and geochemical signatures of paleo-exposure events in Cenomanian–Santonian sequences (Sarvak and Ilam formations) in SW Iran: Insights from carbon and strontium isotopes chemostratigraphy. Sedimentary Geology, 434: 106136.
Mehrabi, H (2023) Deposition, Diagenesis, and Geochemistry of Upper Cretaceous Carbonates (Sarvak Formation) in the Zagros Basin and the Persian Gulf, Iran. Minerals. 13(8): 1078. https://doi.org/10.3390/min13081078.
Mehrabi, H., Yahyaei, E., Navidtalab, A., Rahimpour-Bonab, H., Abbasi, R., Omidvar, M., Assadi, A., Honarmand, J (2023) Depositional and diagenetic controls on reservoir properties along the shallow-marine carbonates of the Sarvak Formation, Zagros Basin: Petrographic, petrophysical, and geochemical evidence. Sedimentary Geology, 454: 106457.
Mohseni, H., Zeybaram Javanmard, R (2020) New data on sequence stratigraphy of the Sarvak Formation in Malekshahi city, (Ilam province) Zagros basin, Iran. Marine and Petroleum Geology, 112: 104035. https://doi.org/https://doi.org/10.1016/j.marpetgeo.2019.104035.
Motiei, H (1993) Stratigraphy of Zagros. In: Hushmandzadeh, A. (Ed.), Treatise on the Geology of Iran. Geological Survey of Iran. (In Persian)
Orang, K., Motamedi, H., Azadikhah, A., Royatvand, M (2018) Structural framework and tectono-stratigraphic evolution of the eastern Persian Gulf, offshore Iran, Marine and Petroleum Geology, 91: 89-107.
Perotti, C. R., Carruba S., Rinaldi, M., Bertozzi, G., Feltre, L., and Rahimi, M (2011) The Qatar–South Fars Arch Development (Arabian Platform, Persian Gulf): Insights from Seismic Interpretation and Analogue Modelling. New Frontiers in Tectonic Research - At the Midst of Plate Convergence, 325-352. https://doi.org/10.5772/20299.
Pirouz, M., Avouac, J. P., Gualandi, A., Hassanzadeh, L., Sternai, P (2017) Flexural bending of the Zagros foreland basin. Geophysical Journal International, 210: 1659–1680. https://doi.org/10.1093/gji/ggx252.
Pomar, L (2001) Types of carbonate platforms: a genetic approach. Basin Research, 13: 313–334.
Rahimpour‐Bonab, H., Mehrabi, H., Navidtalab, A., Omidvar, M., Enayati‐Bidgoli, A. H., Sonei, R., Sajjadi, F., Amiri‐Bakhtyar, H., Arzani, N., Izadi‐Mazidi, E (2013) Palaeo‐exposure surfaces in Cenomanian–santonian carbonate reservoirs in the Dezful embayment, SW Iran. Journal of Petroleum Geology, 36 (4): 335-362. https://doi.org/10.1111/jpg.12560.
Ricateau, R., Riche, P. H (1980) Geology of the Musandam Peninsula (Sultanate of Oman) and its surroundings. Journal of Petroleum Geology, 3:139-152. https://doi.org/10.1111/j.1747-5457.1980.tb00979.x.
Sadooni, F. N., Alsharhan, A. S (2003) Stratigraphy, microfacies, and petroleum potential of the Mauddud Formation (Albian–Cenomanian) in the Arabian Gulf basin. AAPG Bulletin, 87 (10): 1653–1680.
Searle, M. P., Cherry, A. G., Ali, M.Y., Cooper, D. J. W (2014) Tectonics of the Musandam Peninsula and northern Oman Mountains: From ophiolite obduction to continental collision. GeoArabia, 19: 135–174.
Searle, M. P. Ali, M. Y (2009) Structural and tectonic evolution of the Jabal Sumeini-Al Ain-Buraimi region, northern Oman and eastern United Arab Emirates. GeoArabia, 14 (1): 115-142. https://doi.org/10.2113/geoarabia1401115.
Sharland, P. R., Archer, R., Casey, D. M., Davies, R. B., Hall, S. H., Heward, A. P., Horbury, A. D. Simmons, M. D (2001) Arabian plate sequence stratigraphy. Gulf PetroLink. Bahrain, 371 p.
Van Buchem, F. S. P., Gaumet, F., Védrenne, V., Vincent, B (2006) Middle East Cretaceous sequence stratigraphy study, unpablished report, NIOC – IFP, 167 p.
Van Buchem, F. S. P., Baghbani, D., Bulot, L. G., Caron, M., Gaumet, F., Hosseini, S. A., Keyvani, F., Schroeder, R., Swennen, R., Vedrenne, V., Vincent, B (2010) Barremian - Lower Albian sequence-stratigraphy of southwest Iran (Gadvan, Dariyan and Kazhdumi formations) and its comparison with Oman, Qatar and the United Arab Emirates, GeoArabia Special Publication, 4(2): 503-548.
Van Buchem, F. S. P., Al-Husseini, M. I., Maurer, F., Droste, H. J (2010) Barremian − Aptian stratigraphy and hydrocarbon habitat of the eastern Arabian Plate. GeoArabia Special Publicatio. Gulf PetroLink. Bahrain, 1: 49-96.
Van Buchem, F. S. P., Simmons, M. D., Droste, H. J. and Davies, R. B (2011) Late Aptian to Turonian Stratigraphy of the Eastern Arabian Plate Depositional Sequences and Lithostratigraphic Nomenclature. Petroleum Geoscience, 17: 211-222.
Vincent, B., van Buchem, F. S. P., Bulot, L. G., Jalali, M., Swennen, R., Hosseini, A. S., Baghbani, D (2015) Depositional sequences, diagenesis and structural control of the Albian to Turonian carbonate platform systems in coastal Fars (SW Iran). Marine and Petroleum Geology, 63: 46-67.
Wilson, B. R (1975) Carbonate Facies in Geological History. Springer. Berlin, 471 p.
Volume 13, Issue 26 - Serial Number 26
December 2025
Pages 139-162

  • Receive Date 05 March 2025
  • Revise Date 20 October 2025
  • Accept Date 22 October 2025