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Sequence stratigraphic investigation of the Early Miocene Formations in the Zagros Folded belt using wireline well logs analysis

 Devan Othman Hussein1

 1 Department of Geology, College of Science, University of Sulaimani, Sulaimani, Kurdistan region- Iraq

Original: 3 November 2019       Revised: 15 January 2019      Accepted: 30 January 2020         Published online: 20 June 2020  

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Based on the available core sample description and wireline log analysis, sedimentary facies, microfacies and lithofacies interpretation are evaluated to determine the large scale architecture in the Early Miocene formations, from close to the contemporaneous Lower Miocene depositional margin of the Zagros basin, as represented in outcrop sections, to productive oil field within the Kirkuk embayment equivalents ca. 100 km to the south-west and west. Sequence stratigraphic methods of sedimentary log interpretation and log correlation are used to construct a model of the overall regressive and transgressive or combined transgressive to regressive character of each of the formations, thus providing an indication of the gross reservoir stacking patterns over this distance. Based on outcrop descriptions and wireline log data the Dhiban Formation is interpreted as a lowstand system tract (LST) of a third order depositional sequence, lying between the Euphrates Formation regressive parasequence set that could represent a highstand systems tract (HST) of a third order sequence and the transgressive parasequence set (third order transgressive systems tract, TST) of the lower part of the Jeribe Formation.  Several higher order transgressive and regressive cycles are evident within the Dhiban Formation in the subsurface sections. The transgressive cycles within the Dhiban formation are associated with the carbonate layers. Yellowish grey, friable anhydrite is recognized in the Dhiban Formation at outcrop, and thick anhydrite of low gamma ray and high density readings was identified in the subsurface sections. This lowstand evaporite system filling the basin centre can be confirmed as the relevant model for the mixed carbonate-evaporite basin at the scale of a third order cycle.

Key Words: Wierline well log,  Sequence stratigraphy, Gamma Ray, Carbonate-Evaporite, Reservoir quality


[1] Ahr, W. M., "Geology of carbonate reservoirs: the identification, description, and characterization of hydrocarbon reservoirs in carbonate rocks". Canada, John Wiley & Sons, Inc., Hoboken, New Jersey, 296 p. (2008).

[2] Al-Ghreri, M. F., A. S. Al-jibouri, and A. A. Al-Ahmed, "Facies architecture and sequence development of the Euphrates Formation in Western Iraq". Arabian Journal of Geosciences, Vol. 7, pp. 2679-2687. (2013).

[3] Al-Hietee, S. A., "Facies architecture and sequence stratigraphy of the Lower and Middle Miocene, Kirkuk area, North Iraq". Unpublished Msc. Thesis, University of Baghdad, 115 p.. (2012).

[4] Ambrose, W. A., T. F. Hentz, and R. G. Loucks, "Sequence stratigraphic controls on complex reservoir architecture of highstand fluvial dominated deltaic and lowstand valley-fill deposits in the Upper Cretaceous (Cenomanian) woodbine group, East Texas field: Regional and local perspectives". American Association of Petroleum Geologists Bulletin, Vol. 93, pp. 231-269. (2009).

[5] Aqrawi, A. A. M., J. C. Goff, A. D. Horbury, and F. N. Saddni, "The petroleum geology of Iraq". Scientific Press Ltd, Beacon field, Bucks, 424 p. (2010).

[6] Becker, F., and T. BechstÄDt, "Sequence stratigraphy of a carbonate-evaporite succession (Zechstein 1, Hessian Basin, Germany)". Sedimentology, Vol. 53, pp. 1083-1120. (2006).

[7] Catuneanu, O., "Principle of sequence stratigraphy". Elsevier BV, 375 p.. (2006).

[8] Catuneanu, O., V. Abreu, J. P. Bhattacharya, M. D. Blum, R. W. Dalrymple, P. G. Eriksson, C. R. Fielding, W. L. Fisher, W. E. Galloway, M. R. Gibling, K. A. Giles, J. M. Holbrook, R. Jordan, C. G. S. C. Kendall, B. Macurda, O. J. Martinsen, A. D. Miall, J. E. Neal, D. Nummedal, L. Pomar, H. W. Posamentier, B. R. Pratt, J. F. Sarg, K. W. Shanley, R. J. Steel, A. Strasser, M. E. Tucker, and C. Winker, "Towards the standardization of sequence stratigraphy". Earth-Science Reviews, Vol. 92, pp. 1-33. (2009).

[9] Embry, A. F., "Transgressive–regressive (T–R) sequence analysis of the Jurassic succession of the Sverdrup Basin, Canadian Arctic Archipelago". Canadian Journal of Earth Sciences, Vol. 30, pp. 301-320. (1993).

[10] Embry, A.F., Johannessen, E.P., "T–R sequence stratigraphy, facies analysis and reservoir distribution in the uppermost Triassic–Lower Jurassic succession, Western Sverdrup Basin, Arctic Canada". In: Vorren, T.O., Bergsager, E., Dahl-Stamnes, O.A., Holter, E., Johansen, B., Lie, E., Lund, T.B. (Eds.), Arctic Geology and Petroleum Potential. Special Publication, Vol. 2. Norwegian Petroleum Society, pp. 121–146. (1992).

[11] Embry, J.-C., E. Vennin, F. S. P. Van Buchem, R. Schroeder, C. Pierre, and M. Aurell, "Sequence stratigraphy and carbon isotope stratigraphy of an Aptian mixed carbonate-siliciclastic platform to basin transition (Galve sub-basin, NE Spain)". Geological Society, London, Special Publications, Vol. 329, pp. 113-143. (2010).

[12] English, J. M., G. A. Lunn, L. Ferreira, and G. Yacu, "Geological evolution of the Iraqi Zagros, and its influence on the distribution of hydrocarbons in the Kurdistan region". American Association of Petroleum Geologists, Vol. 2, pp. 231-272. (2015).

[13] Galloway, W. E., and D. K. Hobday, "Terrigenous clastic depositional systems". Berlin, Springer,. 470 pp. (1996).

[14] Ghafur, A. A., "Sedimentology and reservoir characteristics of the Oligocene-Early Miocene carbonates (Kirkuk Group)". PhD thesis, Cardiff University, 299 pp. (2012).

[15] Grabowski, G., and C. Liu, "Sequence stratigraphy and depositional history of the Eocene-Miocene carbonates and evaporites in the subsurface of the Northern Mesopotamian Basin, northeast Iraq". 8-th Middle East Geosciences Conference and Exhibition, Bahrain, Manama (Abs.). (2008).

[16] Grabowski, G., and C. Liu, "Strontium -Isotope age dating and correlation of Phanerozoic anhydrites and un-fossiliferous limestone of Arabia". American Association of Petroleum Geologists, Middle East Geoscience Conference and Exhibition. Manama-Bahrain. (2010).

[17] Hussein, D., Collier, R., Lawrence. J., Rashid, F., Glover, P.W.J., Lorinczi, P., & Baban, D.H., "Stratigraphic correlation and paleoenvironmental analysis of the hydrocarbon-bearing Early Miocene Euphrates and Jeribe formations in the Zagros folded thrust-belt". Arabian Journal of Geosciences 10: 543 (2017).

[18] Jassim, S. Z., and J. C. Goff, "Geology of Iraq: Dolin, Prague and Moravian Museum, Brno, Czech Republic". (2006).

[19] John, C. M., G. D. Karner, E. Browning, R. M. Leckie, Z. Mateo, B. Carson, and C. Lowery, "Timing and magnitude of Miocene eustasy derived from the mixed siliciclastic-carbonate stratigraphic record of the northeastern Australian margin". Earth and Planetary Science Letters, Vol. 304, pp. 455-467.(2011).

[20] Johnson, J.G., Murphy, M.A., "Time-rock model for Siluro-Devonian continental shelf, western United States". Geological Society of America Bulletin Vol. 95, pp. 1349–1359. (1984).

[21] Ketzer, J. M. M., "Diagenesis and sequence stratigraphy: An integrated approach to constrain evolution of reservoir quality in sandstones". PhD. Thesis, Acta Universitatis Upsaliensis, Uppsala, Sweden. (2002).

[22] Lawa, F. A., and A. A. Ghafur, "Sequence stratigraphy and biostratigraphy of the prolific Late Eocene, Oligocene and Early Miocene carbonates from Zagros fold-thrust belt in Kurdistan region". Arabian Journal of Geosciences, Vol.8, Issue 10, pp. 8143-8174. (2015).

[23] Morad, S., I. S. Al-Asam, F. H. Nader, A. Ceriani, M. Gasparrini, and H. Mansurbeg, "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". Geo Arabia, Vol. 17, pp. 17-56. (2012).

[24] Morad, S., J. M. Ketzer, and L. F. De Ros, "Spatial and temporal distribution of diagenetic alterations in siliciclastic rocks: implications for mass transfer in sedimentary basins". Sedimentology, Vol. 47, pp. 95-120. (2000).

[25] Morad, S., K. Al-Ramadan, J. M. Ketzer, and L. F. Deros, "The impact of diagenesis on the heterogeneity of sandstone reservoirs: A review of the role of depositional facies and sequence stratigraphy". American Association of Petroleum Geologists Bulletin, Vol. 94, pp. 1267- 1302. (2010).

[26] Pierre, A., Durlet,  C., Razin P., and Chellai E. H., "Spatial and temporal distribution of ooids along a Jurassic carbonate ramp". Amellago outcrop transect, High-Atlas, Morocco Geological Society, London, Special Publications, Vol. 329, pp. 65-88. (2010),

[27] Rider, M. H. & Kennedy, M., "The geological interpretation of well logs". Sutherland, Rider-French Consulting Ltd. (2011).

[28] Rider, M. H., "The Geological interpretation of well logs". Whittles publishing, Scotland. (1996).

[29] Sadooni, Fadhil & Alsharhan, A., "Stratigraphy, lithofacies distribution, and petroleum potential of the Triassic strata of the northern Arabian plate". Aapg Bulletin-AAPG BULL. Vol. 88. Pp. 515-538. 10.1306/12030303067. (2004).

[30] Sarg, J. F., "The sequence stratigraphy, sedimentology, and economic importance of evaporite–carbonate transitions". Sedimentary Geology, Vol. 140, pp. 9-34. (2001).

[31] Sattler, U., V. Zampetti, W. Schlager, and A. Immenhauser, "Late leaching under deep burial conditions: a case study from the Miocene Zhujiang Carbonate Reservoir, South China Sea". Marine and Petroleum Geology, Vol. 21, pp. 977-992. (2004).

[32] Schlager, W., "Sedimentology and sequence stratigraphy of carbonate rocks". Amsterdam, Vrije Universiteit/ Earth and Life Sciences. 146 p. (2002).

[33] Schlager, W., "Carbonate sedimentology and sequence stratigraphy". Amsterdam, Netherlands, Vrije Universiteit/ Faculty of Earth and Life Sciences. 200 p. (2005).

[34] Sharland, Peter & Archer, Ray & M. Casey, David & Davies, Roger & Hall, S.H. & Heward, Alan & D. Horbury, Andrew & Simmons, M., "Arabian Plate Sequence Stratigraphy". GeoArabia. (2001).

[35] Slatt, R. M., "Stratigraphic reservoir characterization for petroleum geologists", geophysicists, and engineers. Vol. 6, Amesterdam, the Netherlands. (2006).

[36] Tucker, M. E., "Sequence stratigraphy of carbonate-evaporite basins: models and application to the Upper Permian (Zechstein) of northeast England and adjoining North Sea". Journal of the Geological Society, Vol. 148, pp. 1019-1036. (1991).

[37] Vail, P. R., R. M. Mitchum, R. G. Todd, J. M. Widmier, S. Thompson, J. B. Sangree, J. N. Bubb, and W. G. Hatlelid, "Seismic stratigraphy and global changes of sea level, in C. E. Payton, ed., Seismic stratigraphy - applications to hydrocarbon exploration". American Association of Petroleum Geologists Memoir, pp. 49-212. (1977).

[38] Van de Poel, H., and W. Schlager, "Mesozoic-Cenozoic variations in mineralogy of skeletal carbonate". Geologie en Mijnbouw, Vol. 73, pp. 31-51. (1994).

[39] Van Wagoner, J. C., H. W. Posamentier, R. M. Mitchum, P. R. Vail, J. F. Sarg, T. S. Loutit, and J. Hardenbol, "An overview of the fundamentals of sequence stratigraphy and key defiinitions", in C. K. Wilgus, B. S. Hastings, C. G. S. C. Kendall, H. W. Posamentier, C. A. Ross, and J. C. Van Wagoner, eds., Sea-level changes: an integrated approach: SEPM Special Publication, pp. 39-45. (1988).

[40] Van Wagoner, J. C., R. M. Mitchum, K. M. Campion, and V. D. Rahmanian, "Siliciclastic sequence stratigraphy in well logs, cores and outcrops: concepts for high-resolution correlation of time and facies". American Association of Petroleum Geologists Methods in Exploration Series, Vol. 7, pp. 55. (1990).

[41] Van Wagoner, J.C., "Overview of sequence stratigraphy of foreland basin deposits: terminology, summary of papers, and glossary of sequence stratigraphy". In: Van Wagoner, J.C., Bertram, G.T. (Eds.), Sequence Stratigraphy of Foreland Basin Deposits: Outcrop and Subsurface Examples from the Cretaceous of North America. Memoir, Vol. 64. American Association of Petroleum Geologists, pp. ix–xxi. (1995).

[42] Vaziri-Moghaddam, H., M. Kimiagari, and A. Taheri, "Depositional environment and sequence stratigraphy of the Oligo-Miocene Asmari Formation in SW Iran". Facies, Vol. 52, pp. 41-51. (2006).