Petrophysical Properties of Khasib Formation in East Baghdad Oil Field Southern Area
DOI:
https://doi.org/10.31699/IJCPE.2020.4.5Keywords:
petrophysical properties, well logs analysis, carbonate formationAbstract
Petrophysical properties evaluation from well log analysis has always been crucial for the identification and assessment of hydrocarbon bearing zones. East Baghdad field is located 10 km east of Baghdad city, where the southern area includes the two southern portions of the field, Khasib formation is the main reservoir of East Baghdad oil field.
In this paper, well log data of nine wells have been environmentally corrected, where the corrected data used to determine lithology, shale volume, porosity, and water saturation. Lithology identified by two methods; neutron-density and M-N matrix plots, while the shale volume estimated by single shale indicator and dual shale indicator, The porosity is calculated from the three common porosity logs; density log, neutron log, and sonic log, the water saturation is calculated by Indonesian model and Archie equation, and the results of the two methods were compared with the available core data to check the validity of the calculation.
The results show that the main lithology in the reservoir is limestone, shale volume ranged between 0.152 to 0.249, porosity between 0.147 to 0.220, and water saturation from 0.627 to 0.966, the high-water saturation indicate that the water quantity is the determining factor of the reservoir units.
Received on 04/02/2020
Accepted on 21/09/2020
Published on 30/12/2020
References
N. Hurley, "Quantification of Vuggy Porosity in a Dolomite Reservoir from Borehole Images and Core, Dagger Draw Field, New Mexico," in Annual Technical Conference and Exhibition, New Orleans, Louisiana, 1998.
S. Ehrenberg and P. H. Nadeau, "Sandstone vs. carbonate petroleum reservoirs: A global perspective on porosity-depth and porosity-permeability relationships," AAPG Bulletin, vol. 89, no. 4, pp. 435-445, 2005.
F. Aminzadeh and S. N. Dasgupta, "Geophysics in Drilling." In Developments in Petroleum Science, vol. 60, pp. 223-246. Elsevier, 2013.
MDOC official web site," [Online]. Retrieved from http://www.mdoc.oil.gov.iq
M. S. Al-Jawad and K. A. Kareem, "Geological Model of Khasib Reservoir- Central Area/East Baghdad Field," Iraqi Journal of Chemical and Petroleum Engineering, vol. 17, no. 3, pp. 1-10, 2016.
B. Al-Qayim, F. Al-Saadoni, and a. Al-Biaty, "Diagenetic Evolution of The Khasib Formation East-Baghdad Oil Field," Iraqi Geological Journal, pp. 56-72, 1993.
T. K. Al-Ameri and R. Y. Al-Obaydi, "Cretaceous petroleum system of the Khasib and Tannuma oil reservoir, East Baghdad oil field, Iraq," Arab J Geosci, 2011.
C. Dawei, Y. Xuanjun, Z. Chuanmin, T. Cong and W. Mengshi, "Logging-lithology identification methods and their application: A case study on," CHINA PETROLEUM EXPLORATION, 2016.
G. Asquith and D. Krygowski, Basic Well Log Analysis, 2nd ed., AAPG, 2006.
E. Frost Jr, "Method for estimation of bulk shale volume in a real-time logging-while-drilling environment". United States of America Patent US 9,551,213 B2, 24 Jan 2017.
F. J. Lucia, Carbonate reservoir characterization: An integrated approach. Springer Science & Business Media, 2007.
GB Asquith, D Krygowski, CR Gibson, Basic well log analysis. Vol. 16. Tulsa: American Association of Petroleum Geologists, 2004.
Smith, M. M, Hao, Yue, Spangler, L. H, Lammers, Kristin, Carroll and S. A, "Validation of a reactive transport model for predicting changes in porosity and permeability in carbonate core samples," International Journal of Greenhouse Gas Control, vol. 90, p. 102797, 2019.
J.-R. Ursin and A. B. Zolotukhin, "Fundamentals of petroleum reservoir engineering." (1997).
L. M. Entyre, "Comparative Performance of a Dual Water Model Equation in Laminar Shaly Sands," 1993.
Yu, Hongyan, Wei, Xiaolong, Wang, Zhenliang, Rezaee, Reza, Zhang, Yihuai, Lebedev, Maxim, Iglauer, Stefan and others, "Review of Water Saturation Calculation Methods in Shale Gas Reservoir," in SPE Asia Pacific Oil and Gas Conference and Exhibition, 2018.
Downloads
Published
Issue
Section
License
Copyright (c) 2020 Iraqi Journal of Chemical and Petroleum Engineering
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
