Integrated stratigraphic study of the Cretaceous petroleum-potential succession, Sulaimani area, Kurdistan, Iraq

Basim Al-Qayim , Shireen Hussein , Fouad M. Qader , Salim H. Al-Hakari Bestoon Shukor , Ziryan Sardar , Dler Ahmed , and Hawar Abdullah
Department of geology, University of Sulaimani, Kurdistan , Iraq
Geological survey & Mineral Exploration Directorate, Sulaimani, Kurdistan, Iraq


Abstract

The Cretaceous sequence of Kurdistan Region of northeast Iraq form an important
petroleum system in housing potential source rocks such as the Balambo, Sarmord and
Shiranish Formations. It also includes an important reservoir rocks supplied with good
secondary porosity such as the Qamchuqa and Kometan Formations. This study
examined surface and subsurface sections of these units from Sulaimani area of
Kurdistan region of northeast Iraq using stratigraphic analysis, microfacies
investigations, lithostratigraphic correlation in an attempt to characterize these units at
this area and to give an insight regarding the stratigraphic architectural impact on the
development of their petroleum system. Microfacies analyses show the occurrences of
deep to shallow marine facies. It ranges between basinal foraminiferal- Oligostiginal
grainstone to wakestone (Balambo, Sarmord, Kometan, Shiranish, and parts of the
Tanjero Formations) to bioclastic -foraminiferal packstone to wackestone of the
Qamchuqa Formation. The Dolostone part of the Qamchuqa Formation is characterized
by medium to coarse crystalline planar-e to planar-s type mosaic.
The Late Cretaceous units of the Kometan, Shiranish, and Tanjero Formations in both
outcrop and neighboring subsurface sections, show little stratigraphic differences within
the study area from elsewhere in Kurdistan Region. The Early Cretaceous units of the
Balambo, Sarmord and Qamchuqa Formations (which are the focus of this study),
however, show lateral and vertical stratigraphic variations in lithology and thicknesses in
both northward and westward directions. The basic difference is the change of the deep
marine Oligostiginal marly limestone of the Balambo Formation into the dolomitized
platform carbonates of the Qamchuqa Formation in both directions. This lateral changes
passes through a transitional zone of interfingering relation, which is up to 15Km in
width. This zone plays an important role in developing the Cretaceous petroleum system
of the area.

Key Words:
Cretaceous, Kurdistan,
Stratigraphy, Iraq,
Petroleum System


References

Abawi, T. and Hammoudi, R., 2008. Biostratigraphy of the Balambo Formation (Lower Cretaceous ) in Jebel
Azmur- Sulaimaniya Area , northeastern Iraq. Iraqi Journal of Earth Sciences, 8, 24-34.

Abawi, T. and Hammoudi, R., 2010, Stratigraphy of the Dokan Formation (Upper Cretaceous ) Jebel Azmar-
Sulaimaniya Area, Northeastern Iraq. Iraqi Journal of Earth Sciences, 10, 1-10.

Abdul Hassan, A. (2011). Report on semi-detailed geological mapping of Sulaimaniyah-Surdash area.
Geosurve-Iraq library, report No. 8435, 118p.

Al-Hakari, S. H., 2011. Geometric Analysis and Structural Evolution of NW Sulaimani Area, Kurdistan
Region, Iraq. Unpub. Ph.D. thesis, University of Sulaimani, Kurdistan region, Iraq.

Al Shdidi, S., Thomas G. and Delfaud, J., 1995. Sedimentology, Diagenesis and Oil Habit of Lower
Cretaceous Qamchuqa Group, Northern Iraq. AAPG Bulletin, V.79, No.5, PP.763-779.

AL-Peryadi, H. K., 2002. Sedimentological study and reservoir characterizations for Upper Qamchuqa and
Jawan Formations to determine the effective porosity in Bai-Hassan Field, Unpublished M.Sc. Thesis ,
university of Baghdad,178p.(in Arabic).

Al-Qayim, B., F. Qadir, and F.Al-Biaty (2010). Dolomitization and porosity Evaluation of the Cretaceous
Upper Qamchuqa (Mauddud) Formation, Khabbaz oil field, Kirkuk area, Northern Iraq. GeoArabia, V. 15,
No., 4, 49 – 76.

Al-Qayim B, Omer A, and Koyi H (2012). Tectonostratigraphic Overview of the Zagros Suture Zone,
Kurdistan Region, Northeast Iraq , GeoArabia 17: 109-156.

Al-Qayim, B. and Rashid F. (2012) Reservoir characteristics of the Upper Qamchuqa Formation Carbonate
(Albian) at Taq Taq Oil Field, Kurdistan Iraq. Journal of Petroleum Geology, London, V. 35, No. 4, P. 214
– 259.

Al-Qayim, B., Habib, H. and Al-Dyni, N. (1986). Petrology and Geochemistry of Shiranish Formation (Type
Section) Towards Sedimentary Facies Interpretation. Journal of the Geological Society of Iraq. V. 19, No.
3, P. 123-136 Al-Qayim, B. (2013). Characters of Carbonate reservoirs in Kurdistan Region. Oral presentation at the 1st
Iraqi Kurdistan Technical workshop in cooperation with TOTAL Co., Sulaimani University, Sulaimani
,Kurdistan, Iraq.

Al-Qayim, B. (2015 ). Sequence stratigraphy, facies modelling, and dolomitization of the Qamchuqa
Formation of northeast Iraq. Iraqi Bulletin of Geology and Mining (in press). Ameen, F. L. and Gharib,
 H. (2013). Biostratigraphy of the Tethyan Cretaceous Succession from northeastern Zagros Fold 
Thrust Belt. Kurdistan Region, NE Iraq. Arabian Journal of Geosciences, 15, 12 – 24.

Ameen, B. and Karim, K. (2008). New sedimentologic and stratigraphic characteristics of the Upper
Boundary of Qamchuqa Formation (Early Cretaceous) in NE Erbil, Kurdistan Region , NE Iraq. Iraqi
Bulletin of geology and Mining, 5, 1-8.

Aqrawi, A.; Goff, J. ; Horbury, A. and Sadooni F. (2010). The Petroleum Geology of Iraq. Scientific Press
Ltd. ,Bucks, UK. 425.

Bellen, R.C. Van, Dunnington, H. V., Wetzel, R. and Morton, D. 1959. Lexique Stratigraphique
International. ASIE, Fascicule 10 a, Iraq, Paris, 333 P.

Buday, T. and Jassim, S. Z., 1987. The Regional geology of Iraq: Vol. 2 tectonism, magmatism and
metamorphism., S. E. Geol. Survey. Min. Invest., Baghdad, Iraq, 352p.

Daoud, H; Balc, R; and Hama Sur G.(2011) Microfossil Assemblages and Diagenesis of Balambo Formation
from azmer Mountian in north-Eastern Sulaimaniyah, Kurdistan Region, Iraq. Iraqi Bulletin of geology and
Mining, 8, 1-17.

Ditmar,V. and the Iraqi-Soviet team (1971). Geological conditions and hydrocarbon prospect of the republic
of Iraq. V-I Northern and Central parts. Unpublished Techno Export report, INOC Library, Baghdad, Iraq.

Dunham R. J., 1962. Classification of Carbonate Rocks According to Depositional Texture: in Ham W. E.
(ed), Classification of Rocks; a symposium, AAPG, No.1, PP 108-121Flugel (2009)

Embry, AF, and Klovan, JE, 1971, A Late Devonian reef tract on Northeastern Banks Island, NWT:
Canadian Petroleum Geology Bulletin, v. 19, p. 730-781.

Flügel, E. (2009) Microfacies of carbonate rocks; analysis, interpretation andApplication. Springer–Verlag,
Berlin.

Ghafor, I., Sharbasheri, K., and Ahmad, S.,2004. Biostratigraphy of the Balambo Formation(late aptian –
Turonian) in khamza valley, Qalachwalan area, northeastern Iraqi-Kurdistan Region, ZANKO, 16, 27- 42.
Habba, Y. and Abdulla, M (1989). Geochemical study of the hydrocarbon source rocks in northeast Iraq. Oil
and Arab Cooperation, 15, 12-51.

Haddad, S., and Amin M., 2007. Mid-Turonian – early Campanian sequence stratigraphy of northeast Iraq.
GeoArabia, 12, 135-176.

Henson, F.R. (1950) Cretaceous and Tertiary reef formations and associated sediments in Middle East.
AAPG Bulletin, 34, 215 – 238.

Heritage oil Co. (2011). Miran Kurdistan Presentation. Internet File by the operating company.
Ibrahim, M. W. (1983) Petroleum Geology of Southern Iraq. AAPG Bulletin, 67, 97-130.

Karim, K.; Salih, A.; and Ahmad, S. (2013). Stratigraphic analysis of Azmir-Goizha anticline by
nannofossils. Journal of Zankoy Sulaimani part-A. 15, 1 – 22.

Lucia, F. J., 1995. Rock Fabric / Petrophysical Classification of Carbonate pore space for Reservoir
Characterization. AAPG Bulletin, V.79, No. 9, pp.1275-1300.

Maa ́la, K., A., 2008. Geological map of Sulaimaniyah Governorate; sheet NI-38-3, State Company of
geological Survey and Mining, Baghdad

Machel, H. G. 2004. Concept and models of dolomitization :a critical reappraisal. In, C. J. Braithwaite, G.
Rizzi, and G. Darke (Eds.), The geometry and petrophysics of dolomite hydrocarbon reservoir. Geol. Soc.
Lond. Spec. Pub. No. 235, p.7-63.

Qader F. and Al-Qayim B. (2015). Reservoir Characterization of Shuaiba Formation (Aptian), khabbaz Oil
Field, Kirkuk area, NE Iraq. Journal of Petroleum Geology (in press).

Qaradaghi, S. (2007). Sedimentology of Sarmord Formation from selected section in Sulaimani province,
Kurdistan Region, NE Iraq. MSc. Thesis, University of Sulaimani, 143p.

Randazzo, A. F., and L. G. Zachos 1984. Classification and description of dolomitic fabric of rocks from the
Florida Aquifer, U. S. A. Jour. Sed. Geol., v. 57, 151-162.

Sadooni F. N. and A. S. Alsharhan 2003. Stratigraphy, microfacies, and petroleum potential of the Mauddud
Formation (Albian-Cenomanian) in the Arabian Gulf basin. AAPG Bulletin, v. 87, p. 1653-1680.

Sadooni, F. (2004). Stratigraphy, Depositional setting and Reservoir characteristics of Turonian –
Campanian Carbonates in central Iraq. Journal of petroleum Geology, 27, 357-371.

Sibley, D. F., and Gregg, J. M. 1987. Classification of Dolomite Rock Texture. Jour. Sed. Petr. V.57, No.6,
PP. 967-975.

Sharp, I.; Gillespie, D.; Morsalnezhad, D.; Taberner, C.; Karpuz, R.;Verge's,J.; Horbury, J.; Pickard, N.;
Garland, J.; and Hunt, D. (2010) . Stratigraphic architecture and fracture-controlled dolomitization of the
Cretaceous Khami and Bangestan groups: an outcrop case study, Zagros Mountains, Iran. Geological Society
of London, Special publication, 329, 343- 396.