Worldwide drilling activities are significantly raised by the oil industry due to the increased global demand of hydrocarbon. The addition of new and sophisticated equipment, tools, and technologies in drilling a well are adding more costs in terms of new technology and equipment. In contrast, the reduction of drilling time due to the addition of those facilities has significantly reduced the drilling costs. As a result, there is a cost analysis dilemma faced by the drilling industry. In addition, shale gas wells are drilled using drilling technology very similar to that used in the drilling of conventional hydrocarbon wells. This causes the drill bit to wear out which significantly reduces the net penetration rate with the longer trip time. This scenario causes new challenges for the estimation of shale drilling cost in general. The overall cost estimation and analysis creates new challenges and responsibilities for the industry people. Moreover, cost effective drilling is one of the focal points for the industry toward a successful and sustainable drilling because by definition, sustainability covers the parameter, cost. The lack of proper training in handling financial sustainability has caused tremendous frustration in the current energy management sector. While everyone seems to have a solution, it is increasingly becoming clear that these options are not moving our drilling environment to any sustainable state.
This article evaluates current and historical drilling and completion costs of oil and gas wells. As a starting point, the general cost analysis concepts are discussed in detail to have a strong foundation on the drilling cost and time estimation. Field data are used to show the cost trends for various depths in calculating drilling cost and drilling time estimation. Also outlined is the significance of Authorization for Expenditure (AFE) in terms of variations of oil and gas prices, costs, and availability of major well components and services at particular locations. The new addition of some features in cost estimation will help in understanding the overall cost estimation. This article will enhance understanding of drilling cost analysis and will provide a guideline in preparing AFE.
1. I.S. Agbon, Project Economics and Permissible Environmental Cost, SPE 73965, paper presented at the SPE International Conference on Health, Safety and Environment in Oil and Gas Exploration and Production, Kuala Lumpur, Malaysia, March 20–22, (2002).Search in Google Scholar
2. American Petroleum Institute, 2001 Joint Association Survey on Drilling Costs, Washington, DC: American Petroleum Institute, (2002).Search in Google Scholar
3. C. Augustine, J.W. Tester, B. Anderson, S. Petty, and B. Livesay, A Comparison of Geothermal with Oil and Gas Well Drilling Costs, SGP-TR-179, 7th Proceedings, Thirty-First Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, California, January 30–February 1, (2006).Search in Google Scholar
4. J.C. Cunha, Effective prevention and mitigation of drilling problems, World Oil & Gas Technologies, 2, 28–34 (September, 2002).Search in Google Scholar
5. J. Dodson, and T. Dodson, Drilling efficiency numbers static. Offshore, 55(9), 26–28 (2003).Search in Google Scholar
6. F.E. Dupriest, Comprehensive Drill-Rate Management Process to Maximize Rate of Penetration, Paper SPE 102210, presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, 24–27 September DOI: 10.2118/102210-MS. (2006).10.2118/102210-MSSearch in Google Scholar
7. Economic Dashboard, http://economicdashboard.albertacanada.com/GrossDomesticProduct#sthash.ErQTErOb.dpuf (accessed on December 12, 2014).Search in Google Scholar
8. M.E. Hossain, and A.A. Al-Majed, Fundamentals of Sustainable Drilling Engineering, p. 786, Wiley and Scrivener Publishing Company, Austin, TX 78702. (2015).10.1002/9781119100300Search in Google Scholar
9. M.E. Hossain, A. Al-Majed, A.R. Adebayo, A.S. Apaleke, and S.M. Rahman, A critical review on drilling waste management toward sustainable solutions, Environ. Eng. Manage. J. (2014).Search in Google Scholar
10. P.B. Jenkins, and A.L. Crockford, Drilling Costs, SPE 5266, presented for the SPE European Spring Meeting of 1975 of the SPE of ATME, London, England, April 14–15, (1975).10.2118/5266-MSSearch in Google Scholar
11. M. Khodja, M. Khodja-Saber, J.P. Canselier, N. Cohaut, and F. Bergaya, Drilling fluid technology: Performances and environmental considerations, products and services; from R&D to final solutions, In Tech, I. Fuerstner (Ed.), http://www.intechopen.com/books/products-and-services--from-r-d-to-final-solutions/drilling-fluid-technologyperformances-and-environmental-considerations (2010).Search in Google Scholar
12. A.W. Oag, and M. Williams, The Directional Difficulty Index—A New Approach to Performance Benchmarking, Paper SPE 59196, presented at the IADC/SPE Drilling Conference, New Orleans, pp. 23–25 February. DOI: 10.2118/59196-MS, (2000).10.2118/59196-MSSearch in Google Scholar
© 2015 M. Enamul Hossain, published by Sciendo
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