A Statistical Survey for Drilling Problems at North Rumaila Field, Southern Iraq. A Review enhanced with Well Logs Analyses
Al-Dujaili A.N. Mousa S.H. Tileuberdi N.
2025Hashemite University
Jordan Journal of Earth and Environmental Sciences
2025#16Issue 3289 - 297 pp.
This study was accomplished to review the drilling problems in the North Rumaila Field, Southern Iraq. A statistical analysis for each formation reflecting the effect of drilling problems with overall analysis for the selected part of the field. The recorded mud logs will be used to confirm the results. The results show that losses should be expected at the base of the Dammam Formation and Hartha, Mishrif, and Zubair Formations. A significant washout in the Tanuma Formation occurred. The injector(s) should remain shut in until the Mishrif Formation case is off to prevent the potential for flow. The variability of Mishrif reservoir architecture and rock types might lead to irregular sweep and water breakthrough if higher permeability layers are present. Sloughing formations represent Tanuma, Nahr Umr, and Upper Shale. Generally, the potential for stuck pipes will be evident in the Mishrif, Nahr Umr, and Zubair Formations. Bit damage occurs through drilling entire anhydrite layers in L. Fars and Rus Formations. The high-effect problem (36.41%) was the loss of mud circulation, while slide drilling (0.54%) represented the lesser effect. Dammam is the most formation that faced drilling problems according to the percentage of all wells drilled (56.4% for each caving and mud loss), while no significant problems occurred in Dibdibba, Khasib, Rumaila, Ahmedi, Mauddud, and Shuaiba Formations. In general, the Middle South part of the field shows fewer drilling problems than the edge of the Field with South Rumaila Field, especially in the productive Formations (Mishrif, Mauddud, and Zubair).
Drilling Problems , Mud log , Mud Loose , North Rumaila Field , Statistical Analysis
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Petroleum Engineering Department, Amirkabir University of Technology, Tehran, Tehran, Iran
Department of Financial and Banking Sciences, University of Kufa, Najaf, Najaf, Iraq
Laboratory of Engineering Profile, Satbayev University, Satbayev St. 22a, Almaty, 050013, Kazakhstan
Petroleum Engineering Department
Department of Financial and Banking Sciences
Laboratory of Engineering Profile
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