New Analytical Model for Predicting the Unstable Zone Around the Borehole
- Mohamad Heidarian (Shahid Bahonar University of Kerman) | Hossein Jalalifar (Shahid Bahonar University of Kerman) | Mahin Schaffie (Shahid Bahonar University of Kerman) | Saeed Jafari (Shahid Bahonar University of Kerman)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- December 2014
- Document Type
- Journal Paper
- 1,177 - 1,183
- 2014.Society of Petroleum Engineers
- 1.7.1 Underbalanced Drilling, 1.11 Drilling Fluids and Materials, 1.6 Drilling Operations, 1.11.2 Drilling Fluid Selection and Formulation (Chemistry, Properties)
- instability, Mouhr–Coulomb, optimal mud weight, analytical model, poroelastic
- 6 in the last 30 days
- 345 since 2007
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In this study, a new analytical model, which is computationally lower in cost than current numerical methods, is presented to calculate the radius of the plastic zone around the borehole in underbalanced drilling (UBD) to prevent borehole instability. With this model, it is also possible to analytically calculate the optimal drilling-mud weight, which is the amount of mud weight with no plastic zone. The presented model is based on the Mouhr–Coulomb failure criterion. The model can be used in both vertical and inclined wells and in poroelastic formations with anisotropic horizontal stresses. Predictions from the model provide a reasonable match to the field data and numerical solution results.
|File Size||575 KB||Number of Pages||7|
Ezzat, A. M. 1993. Horizontal Drilling and Completion Fluids Design Criteria. Paper SPE 25595 presented at SPE Middle East Oil Technical Conference and Exhibition, Bahrain, 3–6 April. http://dx.doi.org/10.2118/25595-MS.
Fjaer, E., Holt, R.M., Horsrud, P., et al. 2008. Petroleum Related Rock Mechanics, second edition. Amsterdam, The Netherlands: Elsevier.
Goodman, R.E. 1989. Introduction Engineering Rock Mechanic, second edition. Berkeley, California: John Wiley and Sons.
Heidarian, M. 2012. Evaluation of the Stresses Distribution on the Wells with Tubing Using Finite Element Method. MS thesis, Shahid Bahonar University of Kerman, Kerman, Iran (June 2012).
Harrison, J. P. and Hudson, J. A. 1997. Introduction to Principles Engineering Rock Mechanics. London, UK: Pergamon.
Islam, M. A., Skalle, P. and Tantserev, E. 2009. Underbalanced Drilling in Shale–Perspective of Factors Influences Mechanical Borehole Instability. Paper IPTC 13826 presented at International Petroleum Technology Conference, Doha, Qatar, 7–9 December. http://dx.doi.org/10.2523/13826-MS.
Kang, Y., Yu, M., Miska, S., et al. 2009. Wellbore Stability: A Critical Review and Introduction to DEM. Paper SPE 124669 presented at SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, 4–7 October. http://dx.doi.org/10.2118/124669-MS.
Lake, L. W and Mitchell, R. F. 2007. Petroleum Engineering Handbook, Vol. 2, 173–175. Richardson, Texas: Textbook Series, SPE.
Mohiuddin, M.A., Khan, K., Abdulraheem, A., et al. 2006. The Analysis of Wellbore Instability in Vertical, Directional, and Horizontal Wells Using Field Data. J. Pet. Sci. Eng. 55 (1–2): 83–92. http://dx.doi.org/10.1016/j.petrol.2006.04.021.
Morshedi, M. 2010. The Analysis of the Wellbore Stability in Open Hole Wells. MS thesis, Islamic Azad University, Omidieh, Iran (July 2010).
Onaisi, A., Locane, J. and Razimbaud, A. 2000. Stress Related Wellbore Instability Problems in Deep Wells in ABK Field. Paper SPE 87279 presented at Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, United Arab Emirates, 13–15 October. http://dx.doi.org/10.2118/87279-MS.
Salehi, S., Hareland, G. and Khademi Dehkordi, K. 2007. Wellbore Stability Analysis in UBD Wells of Iranian Fields. Paper SPE 105155 presented at IADC/SPE Middle East Oil Technical Conference and Exhibition, Kingdom of Bahrain, 11–14 March. http://dx.doi.org/10.2118/105155-MS.
Santarelli, F. J., Zaho, S., Burrafato, G., et al. 1996. Wellbore Stability Analysis Made Easy and Practical. SPE Drill & Compl 12 (4): 212–218. http://dx.doi.org/10.2118/35105-PA.
Shahri, M. 2005. Detecting and Modeling Cement Failure in High Pressure/High Temperature Wells Using Finite Element Method. MS thesis, Texas A&M University, College Station, Texas (December 2007).