The Impact of Paleoclimate on Dolomite Reservoir Development in the Zagros and Persian Gulf Regions

Document Type : Research Paper


Department of Petroleum Exploration at University of Tehran, Tehran, Iran


Dolomite reservoirs flourished during arid climatic periods in the Middle East, primarily in the Permo- Triassic, Upper Jurassic, and Oligo-Miocene formations. These dolomitized reservoirs are frequently linked to evaporites, exhibit isotopically enriched signatures, and tend to occur predominantly in the more restricted regions of carbonate platforms. These observations strongly support their origin through sabkha and evaporative reflux processes. Consequently, dolomite formation and distribution are primarily influenced by early diagenetic processes and climatic conditions during arid periods. Dolomitization has exerted a significant influence on reservoir properties within the studied carbonate
platforms. Porosity distribution and variation are jointly controlled by several factors, including dolomite content, texture, crystal size, anhydrite abundance, dolomite cementation, and the extent of burial compaction. While dolomite textures can vary from fabric-preserving to fabric-destroying, the overall reservoir properties exhibit an ascending pattern from intertidal to shoal facies. This trend is primarily determined by the proximity to the source of dolomitizing brines. The downward percolation of brines, coupled with decreasing dolomitizing potential, leads to an increase in dolomite crystal size within depositional cycles as one moves further away from the anhydrite facies. Proximal areas, characterized by fine-grained intertidal and lagoonal facies, are more susceptible to anhydrite cementation and overdolomitization, resulting in significant porosity reduction. Conversely, in more distal regions, reservoir quality substantially improves, particularly in areas dominated by sucrosic dolomite or grain-rich facies. While this trend may be altered by compaction during burial, it
underscores the crucial role of dolomitization in preserving porosity, especially in deeply buried carbonate reservoirs


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Article Title [Persian]


Adams, J.E., Rhodes, M.L., 1960. Dolomitization by seepage refluxion. AAPG Bulletin, 44: 1912-1920.
Al-Husseini, M.I., 1997. Jurassic sequence stratigraphy of the western and southern Arabian Gulf. GeoArabia, 2: 361-382.
Al-Husseini, M.I., 2000. Origin of the Arabian plate structures: Amar Collision and Najd Rift. GeoArabia, 5: 527-542.
Al-Husseini, M.I., 2007. Iran's crude oil reserves and production. GeoArabia, 12: 69-94.
Alavi, M., 2004. Regional stratigraphy of the Zagros fold-thrust belt of Iran and its proforeland evolution. American Journal of Science, 304: 1-20.
Alsharhan, A.S., 2014. Petroleum systems in the Middle East. In: H. R. Rollinson, M.P.S., I. A. Abbasi, A. Al-Lazki, M. H. Al Kindi, (Ed), Tectonic Evolution of the Oman Mountains. Geological Society, Geological Society, 361-408.
Alsharhan, A.S. and Nairn, A.E.M., 1997. Sedimentary basins and petroleum geology of the Middle East. Elsevier, 843, 99.
Aqrawi, A.A.M., Keramati, M., Ehrenberg, S.N., Pickard, N., Moallemi, A., Svånå, T., Darke, G., Dickson, J.A.D. Oxtoby, N.H., 2006. The origin of dolomite in the Asmari Formation (oligocenelower miocene), dezful embayment, SW Iran. Journal of Petroleum Geology, 29: 381-402.
Berra, F., Angiolini, L., 2014. The evolution of the Tethys region throughout the Phanerozoic: A brief tectonic reconstruction. In: Marlow, L., Kendall, C. and Yose, L. (Eds), Petroleum systems of the Tethyan region. AAPG, 1-27.
Beydoun, Z.R., 1998. Arabian plate oil and gas: Why so rich and so prolific? Episodes, 21: 74-81.
Beydoun, Z.R., Clarke, M.W.H., Stoneley, R., 1992. Petroleum in the Zagros Basin: a late Tertiary foreland basin overprinted onto the outer edge of a vast hydrocarbon-rich Paleozoic- Mesozoic passive-margin shelf. Foreland basins and fold belts, 309-339.
Bordenave, M.L., 2014. Petroleum Systems and Distribution of the Oil and Gas Fields in the Iranian Part of the Tethyan Region. In: Marlow, L., Kendall, C.C.G. and Yose, L.A. (Eds), Petroleum Systems of the Tethyan Region. AAPG, 505–540.
Braithwaite, C.J.R., Rizzi, G. Darke, G., 2004. The Geometry and Petrogenesis of Dolomite Hydrocarbon Reservoirs. Geological Society of London, Geological Society of London.
Budd, D.A., 2001. Permeability loss with depth in the Cenozoic carbonate platform of west-central Florida. AAPG Bulletin, 85: 1253-1272.
Cantrell, D.L., 2006. Cortical fabrics of Upper Jurassic ooids, Arab Formation, Saudi Arabia: Implications for original carbonate mineralogy. Sedimentary Geology, 186, 157-170.
Chafetz, H.S., Rush, P.F., 1994. Diagenetically altered sabkha-type Pleistocene dolomite from the Arabian Gulf. Sedimentology, 41: 409-421.
Csoma, É., Goldstein, R.H., 2012. Diagenetic Salinity Cycles: A link between carbonate diagenesis and Geopersia 2024, 14(1): 113-143 141
sequence stratigraphy. In: Ketzer, J.M. and Morad, S. (Eds), Linking Diagenesis to Sequence Stratigraphy. Int. Assoc. Sedimentol. , Int. Assoc. Sedimentol, 407-444.
Daraei, M., Rahimpour-Bonab, H., Fathi, N., 2014. Factors shaping reservoir architecture in the Jurassic Arab carbonates: A case from the Persian Gulf. Journal of Petroleum Science and Engineering, 122: 187-207.
Ehrenberg, S.N., Eberli, G.P., Keramati, M. and Moallemi, S.A., 2006. Porosity-permeability relationships in interlayered limestone-dolostone reservoirs. AAPG Bulletin, 90: 91-114.
Ehrenberg, S.N., Nadeau, P.H., Agrawi, A.A.M., 2007a. A comparison of Khuff and Arab reservoir potential throughout the Middle East. AAPG Bulletin, 91: 275-286.
Ehrenberg, S.N., Pickard, N.A.H., Laursen, G.V., Monibi, S., Mossadegh, Z.K., Svånå, T.A., Aqrawi, A.A.M., McArthur, J.M. and Thirlwall, M.F., 2007b. Strontium isotope stratigraphy of the asmari formation (Oligocene - Lower miocene), SW Iran. Journal of Petroleum Geology, 30, 107-128.
Esrafili-Dizaji, B., Dalvand, M., 2018. Early–Middle Triassic Dashtak Formation in the Zagros Domain, Iran: controls of eustasy, tectonic, and palaeoclimate. In: Pöppelreiter, M.C. (Ed), Lower Triassic to Middle Jurassic Sequence of the Arabian Plate, 163-178.
Esrafili-Dizaji, B., Rahimpour-Bonab, H., 2013. A review of permo-triassic reservoir rocks in the zagros area, sw iran: Influence of the qatar-fars arch. Journal of Petroleum Geology, 36: 257-279.
Esrafili-Dizaji, B., Rahimpour-Bonab, H., 2014. Generation and evolution of oolitic shoal reservoirs in the Permo-Triassic carbonates, the South Pars Field, Iran. Facies, 60: 921-940.
Faqira, M., Rademakers, M., Afifi, A.M., 2009. New insights into the hercynian orogeny, and their implications for the paleozoic hydrocarbon system in the arabian plate. GeoArabia, 14: 199-228.
Fischer, A.G., 1982. Long term climatic oscillations recorded in stratigraphy. In: Berger, W.H. and Crowell, J.C. (Eds), Climate and Earth History. National Academy Press, National Academy Press, 77–82.
Ghazban, F., 2007. Petroleum geology of the Persian Gulf. Tehran University, Tehran University, 717 p.
Glennie, K.W., 1992. Plate tectonics and the Oman Mountains. Tribulus, 2: 11-21.
Haq, B.U., Hardenbol, J., Vail, P.R., 1987. Chronology of fluctuating sea levels since the Triassic. Science, 235: 1156-1167.
Heydari, E., 2008. Tectonics versus eustatic control on supersequences of the Zagros Mountains of Iran. Tectonophysics, 451: 56-70.
Homke, S., Vergés, J., Serra-Kiel, J., Bernaola, G., Sharp, I., Garcés, M., Montero-Verdú, I., Karpuz,
R., Goodarzi, M.H., 2009. Late Cretaceous-Paleocene formation of the proto-Zagros foreland basin, Lurestan Province, SW Iran. Bulletin of the Geological Society of America, 121: 963-978.
Insalaco, E., Virgone, A., Courme, B., Gaillot, J., Kamali, M.R., Moallemi, A., Lotfpour, M., Monibi, S., 2006. Upper Dalan Member and Kangan Formation between the Zagros Mountains and offshore Fars, Iran: Depositional system, biostratigraphy and stratigraphic architecture. GeoArabia, 11: 75-176.
James, G., Wynd, J., 1965. Stratigraphic nomenclature of Iranian oil consortium agreement area. AAPG Bulletin, 49:2182-2245.
Konert, G., Afifi, A.M., Al-Hajri, S.A., Droste, H.J., 2001. Paleozoic stratigraphy and hydrocarbon habitat of the Arabian plate. GeoArabia, 6: 407-442.
Koop, W.J., Stoneley, R., 1982. Subsidence history of the Middle East Zagros Basin, Permian to Recent. Philosophical Transactions of the Royal Society of London, 305: 149-168.
Lacombe, O., Lavé, J., Roure, F.M. and Verges, J., 2007. Thrust Belts and Foreland Basins: From Fold Kinematics to Hydrocarbon Systems. Springer, 12: 122-148
Land, L.S., 1980. The isotopic and trace element geochemistry of dolomite: the state of the art. Concepts and models of dolomitization, 16:87-110.
Leturmy, P., Robin, C., 2010. Tectonic and stratigraphic evolution of Zagros and Makran during the Mesozoic-Cenozoic: Introduction, 1-4.
Lipinski, C.J., Franseen, E.K., Goldstein, R.H., 2013. Reservoir analog model for oolite-microbialite sequences, Miocene terminal carbonate complex, Spain. AAPG Bulletin, 97: 2035-2057.
Lucia, F.J., 2004. Origin and petrophysics of dolostone pore space. In: Braithwaite, C.J.R., Rizzi, E. and Darke, G. (Eds), The Geometry and Petrogenesis of Dolomite Hydrocarbon Reservoirs. Geological Society of London, Geological Society of London, 141-155. 142 Esrafili-Dizaji et al.
Lucia, F.J., 2007. Carbonate Reservoir Characterization: An Integrated Approach. Springer Science & Business Media, 355.
Lucia, F.J., Major, R.P., 1994. Porosity evolution through hypersaline reflux dolomitization. Dolomites: a volume in honour of Dolomieu, 325-341.
Machel, H.G., 2004. Concepts and models of dolomitization: A critical reappraisal, 7-63.
Markello, J.R., Koepnick, R.B., Waite, L.E. and Collins, J.F., 2008. The Carbonate Analogs Through Time (Catt) Hypothesis and the Global Atlas of Carbonate Fields—A Systematic and Predictive Look at Phanerozoic Carbonate Systems. In: Lukasik, J., Simo, J.A. (Eds), Controls on Carbonate Platform and Reef Development. SEPM, SEPM, 15-46.
McKenzie, J.A., 1981. Holocene dolomitization of calcium carbonate sediments from the coastal sabkhas of Abu Dhabi, U.A.E.: a stable isotope study. Journal of Geology, 8: 185-198.
Mehrabi, H., Rahimpour-Bonab, H., Enayati-Bidgoli, A.H., Esrafili-Dizaji, B., 2015. Impact of contrasting paleoclimate on carbonate reservoir architecture: Cases from arid Permo-Triassic and humid Cretaceous platforms in the south and southwestern Iran. Journal of Petroleum Science and Engineering, 126: 262-283.
Mehrabi, H., Rahimpour‐Bonab, H., Al‐Aasm, I., Hajikazemi, E., Esrafili‐Dizaji, B., Dalvand, M., Omidvar, M., 2018. Palaeo‐exposure surfaces in the Aptian Dariyan Formation, offshore SW Iran: geochemistry and reservoir implications. Journal of Petroleum Geology, 41: 467-494.
Molinaro, M., Guezou, J.C., Leturmy, P., Eshraghi, S.A., de Lamotte, D.F., 2004. The origin of changes in structural style across the Bandar Abbas syntaxis, SE Zagros (Iran). Marine and Petroleum Geology, 21: 735-752.
Moore, C.H., Chowdhury, A., Chan, L., 1988. Upper Jurassic Smackover dolomitization, Gulf of Mexico; a tale of two waters. In: Skula, V. and Baker, P.A. (Eds), Sedimentology and Geochemistry of Dolostones. SEPM.
Morad, S., Al-Aasm, I.S., Nader, F.H., Ceriani, A., Gasparrini, M., Mansurbeg, H., 2012. Impact of diagenesis on the spatial and temporal distribution of reservoir quality in the Jurassic Arab D and C members, offshore Abu Dhabi oilfield, United Arab Emirates. GeoArabia, 17: 17-56.
Mossadegh, Z.K., Haig, D.W., Allan, T., Adabi, M.H., Sadeghi, A., 2009. Salinity changes during Late Oligocene to Early Miocene Asmari Formation deposition, Zagros Mountains, Iran. Palaeogeography, Palaeoclimatology, Palaeoecology, 272: 17-36.
Murray, R.C., 1960. Origin of porosity in carbonate rocks. J. Sediment. Petrol., 30: 59-84.
Murris, R.J., 1980. Middle East: stratigraphic evolution and oil habitat. American Association of Petroleum Geologists Bulletin, 64: 597-618.
Peryt, T.M., Magaritz, M., 1990. Genesis of evaporite‐associated platform dolomites: case study of the Main Dolomite (Zechstein, Upper Permian), Leba elevation, northern Poland. Journ. Petrol. Geol., 37: 745-761.
Pöppelreiter, M.C., 2014. Permo-Triassic Sequence of the Arabian Plate. EAGE.
Powers, R.W., 1962. Arabian upper Jurassic carbonate reservoir rocks. In: Ham, W.E. (Ed), Classification of Carbonate Rocks. American Association of Petroleum Geologists, American Association of Petroleum Geologists, 122-192.
Qing Sun, S., 1995. Dolomite reservoirs: porosity evolution and reservoir characteristics. American Association of Petroleum Geologists Bulletin, 79: 186-204.
Qing Sun, S., Esteban, M., 1994. Paleoclimatic controls on sedimentation, diagenesis, and reservoir quality: lessons from Miocene carbonates. American Association of Petroleum Geologists Bulletin, 78: 519-543.
Rahimpour-Bonab, H., Esrafili-Dizaji, B., Tavakoli, V., 2010. Dolomitization and anhydrite precipitation in permo-triassic carbonates at the south Pars gasfield, offshore Iran: Controls on reservoir quality. Journal of Petroleum Geology, 33: 43-66.
Rahimpour‐Bonab, H., Mehrabi, H., Navidtalab, A., Omidvar, M., Enayati‐Bidgoli, A.H., Sonei, R., Sajjadi, F., Amiri‐Bakhtyar, H., Arzani, N. and Izadi‐Mazidi, E., 2013. Palaeo‐exposure surfaces in Cenomanian–santonian carbonate reservoirs in the Dezful embayment, SW Iran. Journal of Petroleum Geology, 36: 335-362.
Razin, P., Taati, F., van Buchem, F.S.P., 2010. Sequence stratigraphy of Cenomanian-Turonian carbonate platform margins (Sarvak Formation) in the High Zagros, SW Iran: An outcrop reference model for the Arabian Plate, 187-218. Geopersia 2024, 14(1): 113-143 143
Ruban, D.A., Al-Husseini, M.I. Iwasaki, Y., 2007. Review of Middle East Paleozoic plate tectonics.
GeoArabia, 12: 35-56.
Saller, A.H., Henderson, N., 1998. Distribution of porosity and permeability in platform dolomites:
insight from the Permian of west Texas. AAPG Bulletin, 82: 1528-1550.
Sandberg, P.A., 1983. An oscillating trend in Phanerozoic non-skeletal carbonate mineralogy. Nature,
305: 19-22.
Schmoker, J.W., Halley, R.B., 1982. Carbonate porosity versus depth: a predictable relation for south
Florida. American Association of Petroleum Geologists Bulletin, 66: 2561-2570.
Sellwood, B.W., Valdes, P.J., 2006. Mesozoic climates: general circulation models and the rock record.
Sedimentary Geology, 190: 269-287.
Sepehr, M., Cosgrove, J.W., 2004. Structural framework of the Zagros Fold-Thrust Belt, Iran. Marine
and Petroleum Geology, 21: 829-843.
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. GeoArabia, 2: 1-371.
Smith, A.G., 2012. A review of the Ediacaran to Early cambrian ('Infracambrian') evaporites and
associated sediemnts of the Middle East. In: Kilhams, B., Kukla, P.A., Mazur, S., McKie, T.,
Mijnlieff, H.F., van Ojik, K. (Eds), Mesozoic Resource Potential in the Southern Permian Basin.
Geological Society of London, Geological Society of London, 570.
Stampfli, G.M., Borel, G.D., 2002. A plate tectonic model for the Paleozoic and Mesozoic constrained
by dynamic plate boundaries and restored synthetic oceanic isochrons. Earth and Planetary Science
Letters, 196: 17-33.
Tomás, S., Homann, M., Mutti, M., Amour, F., Christ, N., Immenhauser, A., Agar, S.M. Kabiri, L.,
2013. Alternation of microbial mounds and ooid shoals (middle jurasssic, morocco): Response to
paleoenvironmental changes. Sedimentary Geology, 294: 68-82.
van Buchem, F.S.P., Allan, T.L., Laursen, G.V., Lotfpour, M., Moallemi, A., Monibi, S., Motiei, H.,
Pickard, N.A.H., Tahmasbi, A.R., Vedrenne, V., Vincent, B., 2010. Regional stratigraphic
architecture and reservoir types of the Oligo-Miocene deposits in the Dezful Embayment (Asmari
and Pabdeh Formations) SW Iran, 219-263.
van Buchem, F.S.P., Simmons, M.D., Droste, H.J., Davies, R.B., 2011. Late Aptian to Turonian
stratigraphy of the eastern Arabian Plate - depositional sequences and lithostratigraphic
nomenclature. Petroleum Geoscience, 17: 211-222.
Warren, J., 2000. Dolomite: Occurence, evolution and economically important associations. Earth
Science Reviews, 52: 1-81.
Woody, R.E., Gregg, J.M., Koederitz, L.F., 1996. Effect of texture on petrophysical properties of
dolomite: Evidence from the Cambrian-Ordovician of southeastern Missouri. AAPG Bulletin, 80:
Wynd, J., 1965. Biofacies of the Iranian oil Consortium agreement area. IOOC rep, 1082.
Ziegler, A.M., Eshel, G., McAllister Rees, P., Rothfus, T.A., Rowley, D.B., Sunderlin, D., 2003. Tracing
the tropics across land and sea: Permian to present. Lethaia, 36: 227-254.
Ziegler, M.A., 2001. Late Permian to Holocene paleofacies evolution of the Arabian Plate and its
hydrocarbon occurrences. GeoArabia, 6: 445-504.