Characterization of Structural Geology of Faihaa Oilfield, Southern Iraq

Aymen Lazim; Huda F. Khazaal; Madhi A.R. Swadi

doi:10.52716/jprs.v12i3.546

Authors

Aymen Lazim Basra Oil Company
Huda F. Khazaal Basra Oil Company
Madhi A.R. Swadi Basra Oil Company

DOI:

https://doi.org/10.52716/jprs.v12i3.546

Keywords:

Faihaa Oilfield, Yadavaran Oilfield, Structural Geology.

Abstract

Faihaa Oilfield is a new exploration Iraqi Oilfield located in southern Iraq and within Mesopotamian Plain, including the Block 9 exploration area, along the Iraqi-Iranian border. The study area included Faihaa Oilfield (in Iraq) and Yadavaran Oilfield (in Iran). They belong to one anticline (Dome) structure separated by the Iraqi-Iranian border, without a geological boundary between the fields. The current study aims to achieve structural geology analysis to the study area (Faihaa/Yadavaran structure). The structural analysis included geometric and genetic analyses of the study area. According to geometric and genetic analyses results, the Faihaa/Yadavaran structure is classified as an anticline, gentle, upright, non-plunge, and asymmetrical. According to thickness variation, there are two types of formations’ folds are recognized, Thickened and Supratenuous fold generated by two folding mechanisms bending and buckle mechanisms. Bending form Supratenuous fold, perhaps due to the vertical uplift of salt structure and/or basement faults, while buckle produces Thickened fold because of the parallel tectonic movement causes collision between Arabian Plate and Eurasian Plate. Consequently, a special strain pattern was formed and the reservoir quality in the crest of Mishrif and Yamama Formations was the best. The fold axis of the Faihaa/Yadavaran structure has a Boomerang shape, whereas it is almost straight from south to the center of the structure, then tends to the NW with different deviations over the study area formations. This direction may be due to the anticlockwise rotation of the Arabian Plate motion. The results of geometric and genetic analyses revealed that may be Faihaa/Yadavaran structure is one structural trap formed by tectonic activities; Hormuz salt structures, reactivated Basement faults, and Collision between Arabian and Eurasian Plates. The intensity of the tectonic activities of the study area maybe be less than surrounding Oilfields, therefore, the Faihaa Oilfield formation's depth was deeper than adjacent Oilfields.

References

M. A. Ahmed, M. E. Nasser, and S. N. AL Jawad, “Diagenesis Processes Impact on Reservoir Quality in Carbonate Yamama Formation /Faihaa Oil Field,” Iraqi Journal of Science, vol. 61, no. 1, pp. 92–102, Jan. 2020, doi: 10.24996/ijs.2020.61.1.10.

M. Al-Hassani and S. Al-Dulaimi, “Biostratigraphy of Yamama Formation in Faihaa Oil Field, Southern Iraq,” Iraqi Journal of Science, vol. 62, no. 5, pp. 1570–1586, May 2021, doi: 10.24996/ijs.2021.62.5.20.

BOC, “Petrophysical Evaluations Report of Faihaa Oilfield (Appendix 2),” Basra Oil Company, 2019.

W. Abdulnaby, “Structural Geology and Neotectonics of Iraq, Northwest Zagros,” Tectonic and Structure Framework of Zagros Fold-Thrust Belt-chapter Four, vol. 3, pp. 53–73, 2019, doi: 10.1016/b978-0-12-815048-1.00004-4.

S. F. Fouad, “Tectonic and structural evolution of the Mesopotamia foredeep, Iraq,” Iraqi Bull. Geol. Min. Special Issue, vol. 6, no. 2, pp. 41–53, 2010, Accessed: Jul. 25, 2021. [Online]. Available: https://www.iasj.net/iasj/article/61580

S. F. A. Fouad and V. K. Sissakian, “Tectonic And Structural Evolution Of The Mesopotamia Plain,” Iraqi Bulletin of Geology and Mining, vol. Special is, no. 4, pp. 33–46, 2011, Accessed: Jul. 25, 2021. [Online]. Available: https://www.iasj.net/iasj/article/61736

N. M. S. Numan, “Major Cretaceous Tectonic Events in Iraq,” Rafidain Journal of Science, vol. 11, no. 3, pp. 32–52, 2000, Accessed: Jul. 21, 2021. [Online]. Available: https://www.researchgate.net/publication/262379830_Major_Cretaceous_Tectonic_Events_in_Iraq

N. M. S. Numan, “A Plate Tectonic Scenario for the Phanerozoic Succession in Iraq,” Iraqi Geological Journal, vol. 30, no. 2, pp. 85–119, 1997, Accessed: Jul. 21, 2021. [Online]. Available: https://www.researchgate.net/publication/262368041_A_plate_tectonic_scenario_for_the_Phanerozoic_succession_in_Iraq.

J. A. Al-Sakini, “Neo-tectonic Events as an Indicator to Determine the Oil Structures in the Mesopotamian Fields,” in Third Geological Conference, 1995, pp. 130–142.

T. Buday and S. Jassim, “Tectonism, Magmatism, and Metamorphism,” in The Regional Geology of Iraqi, vol. 2, Baghdad: GEOSURV, 1987, p. 445.

H. H. Karim, “Qualitative Interpretation of Basrah Aeomagnetic Map,” Journal of the Geological Society of Iraq, vol. 22, no. 2, pp. 1–8, 1989.

S. Z. Jassim and J. C. Goff, “Geology of Iraq,” 1st ed., Prague, Czech Republic: Dolin, 2006, p. 352.

H. H. Karim, H. Z. Ali, and A. H. Hamdullah, “Digitally Processed Geophysical Data Sets for Identification of Geological Features in Southern Iraq,” Engineering and Technology Journal, vol. 28, no. 2, pp. 236–252, 2010.

H. H. Karim, “General Properties and Patterns Of The Gravity Field Of Basrah Area,” Iraqi Geological Journal, vol. 26, no. 1, pp. 154–167, 1993.

W. G. Almutury and M. M. Al-Asadi, “Tectonostratigraphic History of Mesopotamian Passive Margin during Mesozoic and Cenozoic, South Iraq.,” Kirkuk University Journal-Scientific Studies, vol. 3, no. 1, Jun. 2008, doi: 10.32894/kujss.2008.41948.

R. Park, “Foundation of Structural Geology,” 3rd ed., Osney Mead, Oxford, U.K.: The Alden Press, 1997, p. 204. doi: 10.4324/9780203825112.

A. R. Bhattacharya, “A Classification of Folds: Role of Axial Angle and Thickness Ratio,” Geoinformatics, vol. 16, no. 1, Jan. 2005, doi: 10.6010/geoinformatics.16.27.

M. P. Billings, “Structural Geology,” 3rd ed., New Delhi: Prentice-Hall, Inc., 1972, p. 606.

H. Fossen, “Structural Geology,” 2nd ed., UK: Cambridge University Press, 2016, p. 1885.

BOC, “Final Well Report FAIHAA-1 (FH-1),” Basra Oil Company, p. 240, 2000.

A. A. M. Aqrawi, J. C. Goff, A. D. Horbury, and F. N. Sadooni, “The Petroleum Geology of Iraq,” 1st ed., 2010, p. 435. [Online]. Available: https://www.researchgate.net/publication/261250626_The_Petroleum_Geology_of_Iraq

M. S. Al-kubaisi and A. A. Lazim, “Structural study of Nahr Umr Oil Field in Southern Iraq,” Journal of Petroleum Research and Studies, vol. 6, no. 2, pp. 27–46, Jun. 2016, doi: 10.52716/jprs.v6i2.147.

A. A. Lazim and H. S. Dawood, “Comparison between Rafidhiya and Shuaiba Domes within the properties of Mishrif Formation in Zubair Field; the implication of structural Geology and petrophysical analyses,” Journal of Petroleum Research and Studies, vol. 10, no. 3, pp. 86–101, Nov. 2020, doi: 10.52716/jprs.v10i3.331.

A. A. Lazim, M. Maki, and S. Tariq, “Detect faults of Zubair and Mishrif Formations– Zubair Oilfield by Integrate Structural Geology and Pressure Transient Analyses (PTA) to Selected Wells,” IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG), vol. 8, no. 5, pp. 57–66, Oct. 2020, doi: 10.9790/0990-0805015766.

A. A. Lazim and H. S. Dawood, “Structural geology and petrophysics analysis to Injection wells of Mishrif Formation in Shuaiba Dome – Zubair Oil Field,” Journal of Petroleum Research and Studies, vol. 9, no. 3, pp. 59–74, Sep. 2019, doi: 10.52716/jprs.v9i3.314.

BOC, “Seismic Interpretation and Inversion Report of Faihaa Oilfield (Appendix 1),” Basra Oil Company, 2019.

A. A. Lazim, M. A. Hussein, and H. F. Khazaal, “The Effect of West Qurna Oilfield on The Part of Euphrates River, Northern Basra Governorate, Iraq: Geomorphic and Structural Geology Integrated Analysis,” Iraqi Geological Journal, vol. 53, no. 1, 2020, doi: https://doi.org/10.46717/igj.53.1C.6Rx-2020-04/06.

R. H. Groshong, “3-D Structural Geology,” 2nd ed., Berlin, Heidelberg: Springer Berlin Heidelberg, 2006, p. 400. doi: 10.1007/978-3-540-31055-6.

B. A. Van-der-pluijm and S. Marshak, “Earth Structure: An Introduction to Structural Geology and Tectonics,” 2nd ed., New York: W. W. Norton & Company, Inc., 2004, p. 673.

S. P. Colman-Sadd, “Fold Development in Zagros Simply Folded Belt, Southwest Iran,” AAPG Bulletin, vol. 62, no. 6, pp. 984–1003, Jun. 1978, doi: 10.1306/C1EA4F81-16C9-11D7-8645000102C1865D.