Microfacies Analysis and Diagenesis Processes of Tanuma Formation for Selected Wells at East Baghdad Oil Field in the Center of Iraq
DOI:
https://doi.org/10.24237/ASJ.01.04.704CKeywords:
Khasib Formation, East Baghdad oilfield, Microfacies, Diagenesis processes.Abstract
Khasib Formation was studied in East Baghdad oilfield, Al-Rashdiya area in Baghdad Governorate. The lithology of the formation is limestone throughout the whole sequence in all studied wells (EB-83, EB-87, EB-92, and B94). It is bounded conformably from the top with Tanuma Formation and lower contact with Kifl Formation. The petrographic study shows three main microfacies (lime mudstone, non-laminated peloidal pack-grainstone, and laminated peloidal grainstone) and two submicrofacies (homogeneous non-fossiliferous lime mudstone, bioclast lime mudstone) the study shows the abundance of non-skeletal agains skeletal grains. All microfacies indicate facies zone (7, 8, and 9A) which reflect the platform interior between the open marine to the restricted and evaporitic or brackish water depositional environment. Several diagenesis processes have been distinguished that affected the texture and porosity of Khasib Formation, the most important of which were dissolution, cementation, dolomitization, compaction, micritization, and the porosity of a non-fabric selective type.
References
S. Z. Jassim, J. C., Goff, Geology of Iraq, (Dolin, Prague and Moravian Museum, Srno. 2006), 341
T. Buday, Geological Survey of Iraq, Baghdad, 1, 445 (1980)
R.C. Bellen, H.V. Dunnington, R. Wetzel, D. Morton, Lexique Stratigraphique International Asie, Iraq, 3C, 10a, 333(1959)
A. A. M. Aqrawi, Mar. Petroleum Geology, 13, 781-790(1996)
F. Sadooni, A. Aqrawi, Cretaceous Sequence Stratigraphy and Petroleum Potential of the Mesopotamian Basin, Iraq, In A. Alsharhan, B. Scott, Middle East Models of Jurassic-Cretaceous carbonate systems, SEPM special publication, Tulsa, Oklahoma, USA. 2000)
P. Sharland, R. Archer, D. Casey, R. Davies, S. H. Hall, A. Heward, A. Horbury, M. Simmons, GeoArabia, (2001)
M. Al-majid, The study of compaction in the East Baghdad oil field using seismic velocity analyses, Ms.c thesis, University of Mosul, Iraq (unpublished), 1992
T. K. Al-Ameri, Marine and Petroleum Geology, 28(4), 880–894(2011)
E. Flügel, Microfacies analysis of Limestone, Translated by Christenson K., (Springer, Verlag Berlin, 1982), 633
Jr. S. Boggs, Petrology of Sedimentary Rocks, 2nd Edition, (Cambridge University Press, New York, 2009), 600
E. Flügel, Microfacies of Carbonate Rocks, Analysis, Interpretation, and Application Springer Science and Business Media, Verlag Berlin Heidelberg, 2004), 976
R. J. Dunham, Classification of carbonate rocks according to their depositional texture, In Ham we, editor. Classification of carbonate rocks, AAPG memoir, 1, 2-108(1962)
J. D. Wilson, Carbonate Facies in Geologic History, (Springer verlag, New York, 1975) 483
F. J. Pettijohn, Sedimentary Rocks, 2nd , (New York, Harper Brothers, 1957), 718
M. S. Roger, Stratigraphic Reservoir Characterization for Petroleum Geologists, Geophysicists, and Engineers, (Elsevier, 2006), 478
R. N. Ginsburg, Early diagenesis and 1ithification of shallow water carbonate sediments m south Florida, In: Regional aspects of carbonate deposition: Soc. Econ. Paleontologists and Mineralogists, Spec, Publ., 5, 80-99(1957)
C. H. Moore, Developments in sedimentology, 55( 2004)
P. W. Choquette, L. C., Pray, AAPG., 54(2), 207-250(1970)
M. W. Longman, A.A.P.G. Bull., 64(4), 461-487(1980)
H. Blatt, G.V. Middletone, R. C. Murrary, Origin of sedimentary rock, 2nd, (Printice Hall, Inc., Englewood Cliffs, New Jersey, 1980), 282
M. E. J. Wilson, M. J. Evans, Marine and Pet. Geol., 19, 873-900(2002)
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