Evaluation of Limestone Interval in the Drilled Surface Section of Bn-1 Oil Well
- 1 Department of Civil, Environmental and Natural Resources Engineering, Lulea University of Technology, Lulea, Sweden
- 2 Department of Civil, Environmental and Natural Resources Engineering, Lulea University of Technology, Lulea, Sweden
- 3 Department of Civil, Environmental and Natural Resources Engineering, Lulea University of Technology, Lulea, Sweden
Abstract
The first exploration oil well in any oil block consumes in general more time and cost than the other wells in the same block. Evaluating the drilled wells serves to improve the future operations. This paper evaluates the drilled surface section through real field data for the first exploration oil well drilled in one of the oil blocks, in Kurdistan north of Iraq. The surface section of the well was drilled with the conventional method to penetrate many different geological formations with tight intervals. Drilling efficiency and the difficulties encountered are discussed and explained using various data sources. All daily drilling reports concerning a specific interval were studied. This includes weight on bit, string rotation, mud pump flow and penetration rate. Evaluation was carried out by analyzing the used controllable drilling parameters with the formations features. Penetration of the Pila Spi formation (Middle Eocene) was the most difficult formation in the drilled section. Microsoft Office 365 Pro Plus used in making graphs and Excel tables. Evaluations showed that the conventional technology used left many negative effects, like increase in None Productive Time NPT, cost and ground water pollution. Simultaneous Casing Drilling method proposed as an alternative method for the future campaign.
- Gatlin, C. (1960) Drilling and Well Completions. Department of Petroleum Engineering, University of Texas, Texas.
- Eren, T. (2010) Real-Time-Optimization of Drilling Parameters during Drilling Operations.
- Rabia, H. (2002) Well Engineering & Construction. Entrac Consulting Limited, London.
- Alum, M.A. and Egbon, F. (2011) Semi-Analytical Models on the Effect of Drilling Fluid Properties on Rate of Penetration (ROP). Nigeria Annual International Conference and Exhibition, 30 July-3 August 2011, Abuja. //dx.doi.org/10.2118/150806-MS
- Bourgoyne Jr., A.T., Chenevert, M.E., Milheim, K.K. and Young Jr., F.S. (1986) Applied Drilling Engineering. Society of Petroleum Engineers, Richardson, TX.
- ShaMaran (2012) Total to Acquire ShaMaran Taza Oil Field in Kurdistan. //www.2b1stconsulting.com/total-in-the-race-to-kurdistan-with-exxonmobil-and-chevron/
- Korea National Oil Corporation, KNOC (2009) MLU Data (No. MLOG 0-627). KNOC, Kurdistan.
- Korea National Oil Corporation, KNOC (2009) Daily Drilling Reports (Drilling Report No. 3). KNOC, Kurdistan.
- Korean National Oil Corporation, KNOC (2009) Daily Geological Report (Geological on Site Report No. 21). KNOC, Kurdistan.
- Jassim, S.Z. and Goff, J. (2006) Geology of Iraq. Printed in the Czech Republic: Dolin, Hlavin 2732, Prague and Moravian Museum Zelny trh 6, Brno, Czech Republic, 2006.
- Othman, D.H. and Al-Qayim, B.A. (2010) Lithofacies Association, Dolomitization, and Potentiality of the Pila Spi Formation, Taq Taq Oil Field, Kurdistan Region, Ne Iraq. Iraqi Bulletin of Geology and Mining, 6, 95-114.
- Cochener, J. (2010) Quantifying Drilling Efficiency. Office of Integrated Analysis and Forecasting US Energy.