Abstract
The M. Cenomanian-E. Turonian Mishrif Formation is considered as the most extended reservoir of south Iraq. The present paper reveals the facies of this formation in Ratawi oilfield by the analysis of seven wireline logs. According to reservoir properties, i.e. effective porosity, permeability, and water saturation, the Mishrif Formation is divided into two main units, the upper (mA) and the lower (mB), separated by a shale member. These reservoir units are almost capped by two shale intervals located in the lower and upper contacts with Rumaila and Khasib formations, respectively. The reservoir properties, in terms of porosity and permeability, decrease (porosity less than 5%, permeability less than 0.001 md) to the south of Ratawi structure due to the dominance of deep marine facies, whereas the formation predicted to have good reservoir properties (porosity more than 10%, permeability more than 5 md) to other directions especially to the east, contrary to what was previously expected.
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References
Awadeesian, A.M.R., Al-Jawed, S.N.A., Saleh, A.H.: Reservoir-scale sequence stratigraphy of Mishrif carbonates and implication to water injection strategy North Rumaila field case. Arab. J. Geosci. 8(9), 7025–7040 (2015)
Van Bellen, R.C., Dunnington, H.V., Wetzel, R., Norton, D.M.: Lexique Stratigraphique International, Asie, vol 3, p. 333, Fasc.10a, Iraq, Paris (1959)
Gale, A.S., Voigt, S., Sageman, B.B., Kennedy, W.J.: Eustatic sea-level record for the Cenomanian (Late Cretaceous)—extension to the Western Interior Basin. USA. Geol. 36, 859–862 (2008)
Aqrawi, A.A.M., Thehni, G.A., Sherwani, G.H., Kareem, B.M.A.: Mid-cretaceous rudist-bearing carbonates of the Mishrif formation: an important reservoir sequence in the Mesopotamian basin. Iraq. J. Pet. Geol. 21(1), 57–82 (1998)
Sharland, P.R., Archer, R., Casey, D.M., Davies, R.B., Hall, S.H., Heward, A.P., Horbury, A.D., Simmons, M.D.: Arabian Plate Sequence Stratigraphy. GeoArabia Special Publication 2, Gulf Petrolink, Bahrain, 371 p., with 3 charts (2001)
Buday, T., Jassim, S.Z.: Final report and the regional geological survey of Iraq, Unpub. Report SOM. Library Tectonic Framework Baghdad 2 (1984)
ALSharhan, A.S., Nairn, A.E.M.: Sedimentary Basins and Petroleum Geology of the Middle East: Amsterdam, Netherlands, Elsevier Science B. V., p. 843 (2003)
Buday, T., Jassim, S.Z.: The Regional Geology of Iraq: Tectonism Magmatism, and Metamorphism. II. Kassab, Abbas, M.J. (eds.) Baghdad, p. 325 (1987)
Mahdi, T.A., Aqraw, A.A.M.: Sequence stratigraphic analysis of the Mid-Cretaceous Mishrif formation, Southern Mesopotamian Basin, Iraq. J. Pet. Geol. 37(3), 287–312 (2014)
Idan, R.M., Faisal, R.F., Nasser, M.E., Al-Ameri, T.K., Al-Rawi, D.: Hydrocarbon potential of Zubair formation in the south of Iraq. Arab J. Geosci. 8(7), 4805–4817 (2015 b). https://doi.org/10.1007/s12517-014-1569-6
Idan, R.M.: Total Organic Carbon (TOC) Prediction from Resistivity and Porosity Logs: A Case Study from Iraq. Bull. Iraq nat. Hist. Mus. 14(3), 185–195 (2017)
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Al-Musawi, F.A., Idan, R.M., Salih, A.L.M. (2019). Reservoir Properties and Facies Distribution of Mishrif Formation in Ratawi Oilfield, Southern Iraq. In: Rossetti, F., et al. The Structural Geology Contribution to the Africa-Eurasia Geology: Basement and Reservoir Structure, Ore Mineralisation and Tectonic Modelling. CAJG 2018. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-030-01455-1_25
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