AASCIT - Journal - All Issues

American Journal of Earth Science and Engineering

The Journal

Indexing

Manuscript Information

Suitability of 3D Rock Failure Criteria for Wellbore Stability in the Niger Delta

American Journal of Earth Science and Engineering
Vol.1 , No. 4, Publication Date: Dec. 21, 2018, Page: 174-180

953 Views Since December 21, 2018, 610 Downloads Since Dec. 21, 2018

Paper in PDF (1106K)

Follow on

Authors

[1]	Roland Ifeanyi Nwonodi, Department of Chemical Science, Federal University Wukari, Wukari, Nigeria.
[2]	Solomon Ayuba, Department of Civil Engineering, Bayero University Kano, Nigeria.
[3]	Titus Jibatswen Yusuf, Department of Mechanical Engineering, University of Agriculture, Markudi, Nigeria.
[4]	Adali Francis Eromosele, Department of Petroleum and Gas Engineering, University of Port Harcourt, Choba, Nigerisa.
[5]	Glory Chukwu, Department of Chemical Science, Federal University Wukari, Wukari, Nigeria.
[6]	Tsokwa Tswenma, Department of Chemical Science, Federal University Wukari, Wukari, Nigeria.

Abstract

In order to predict wellbore instability in the Niger Delta basin, there are several important rock failure criteria available in 3D, which produce different results as they were developed on the basis of different hypotheses. The geomechanical data used to develop these criteria were obtained from the Gulf Coast, the North Sea, and the Asia Pacific, but none from Africa, yet engineers apply these models in wellbore stability analysis in the region. Thus, this study was carried out to compare quantitatively the level of discrepancy among the commonly applied 3D rock failure criteria using data from the region. The justification for selecting 3D criteria is the evident significant influence of the intermediate principal stress on rock strength. The alternatives selected for this study are the commonly applied modified Lade, circumscribed Drucker-Prager, middle circumscribed Drucker-Prager, inscribed Drucker-Prager, and Mogi-Coulomb criteria. The authors computed the values of the safe mud weight required to prevent wellbore collapse for the various alternatives and considered their fitness with respect to the mean squared error. Bar charts and discrepancy table displayed the results in the study. From the results, the modified Lade criterion was the most accurate for a vertical wellbore orientation while the Mogi-Coulomb criterion gave the most accurate result for the horizontal wellbore orientation. In addition, the circumscribed Drucker-Prager criterion gave the least accurate result. The closest discrepancy existed between the Mogi-Coulomb criterion and the middle circumscribed Drucker-Prager criterion, while the widest discrepancy existed between the circumscribed Drucker –Prager and the inscribed Drucker-Prager. Thus, the modified Lade and Mogi-Coulomb criteria are more suitable for drilling vertical well and horizontal well respectively.

Keywords

Geomechanical Data, 3D Failure Criteria, Wellbore Instability, Discrepancy Table

Reference

[01]	Mogi, K. (1971). Fracture and flow of rocks under high triaxial compression. J Geophys Res, 76, 1255-1269.
[02]	Drucker, D. C., Prager, W. (1952). Soil mechanics and plastic analysis or limit design. Quart Appl Math, 10, 157-165.
[03]	Von Mises, R. (1913). Mechanik der festen Körper im plastisch deformablen Zustand. Göttin. Nachr. Math. Phys., vol. 1, pp. 582–592.
[04]	Ewy, R. T. (1999). Wellbore-stability predictions by use of a Modified Lade Criterion. SPE Drilling Comp, 14, 85-91.
[05]	Al-Ajmi, A. M. (2006). Wellbore stability analysis based on a new true-triaxial failure criterion, TRITA-LWR Ph.D. Thesis 1026.
[06]	Adewale Dosunmu. (2013). Fundamentals of Petroleum Geomechanics and Wellbore Stability in Well Design and Construction, Modelling and Predicting Well instability, SPE/NAICE conference, Lagos.
[07]	Wiebols, G. A., Cook, N. G. W. (1968). An energy criterion for the strength of rock in polyaxial compression. Int J Rock Mech Min Sci Geomech Abstr, 5, 529-549.
[08]	Fjær, E., Holt, R. M., Horsrud, P., Raaen, A. M., Risnes, R. (2008). Petroleum Related Rock Mechanics, Second Edition, Elsevier, Amsterdam, pp 72.
[09]	Colmenares, L. B. and Zoback, M. D. (2002). A Statistical Evaluation of Intact Rock Failure Criteria Constrained by Polyaxial test data for Five Different Rocks. Int J Rock Mech Min Sci, 39, 695-729.
[10]	Minaeian, Vida. (2014). True triaxial testing of sandstones and shales. Ph.D. Curtin University, Faculty of Science and Engineering, Department of Petroleum Engineering.
[11]	Takahashi, M., and H. Koide. (1989). Effect of the intermediate principal stress on strength And Deformation behavior of sedimentary rocks at the depth shallower than 2000 m. In ISRM International Symposium. Pau, France.
[12]	Chang, C., Haimson, B. (2000). True triaxial strength and deformability of the German Continental deep drilling program (KTB) deep hole amphibolite. J Geophys Res, 105, 18999-19013.
[13]	Al-Ajmi, A. M., Zimmerman, R. W. (2005). Relationship between the Mogi and the Coulomb failure criteria. International Journal of Rock Mechanics and Mining Science, 42, 431-439.
[14]	Gholami, R., Moradzadeh, A., Rasouli, V., Hanachi, J. (2013). Practical application of Failure criteria in determining safe mud weight windows in drilling operations, J Rock Mech Geotech Eng. 55.
[15]	Westergaard, H. M. (1940). Plastic state of stress around a deep well. J Boston Soc Civil Eng, 27, 1-5.
[16]	Opara, A. I. (2011). Estimation of multiple sources of overpressures using vertical effective stress approach: a case study of Niger Delta. Petroleum and Coal, 53 (4), 302 – 314.
[17]	Banerjee, S., Muhuri, S. (2013). Applications of geomechanics – based restoration in structural analysis along Passive Margin Settings – Deep Water Niger Delta example. In New Understanding of the Petroleum System of Continental Margins of the World.
[18]	Short, K. C., Stäuble, A. J. (1967). Outline of geology of Niger Delta: American Association of Petroleum Geologists Bulletin, (51), 761-779.
[19]	Emujapkorue, G. O. (2015). Growth Fault History Analysis of an Oil Field, Niger Delta, Nigeria, International Journal of Geophysics and Geochemistry. Vol. 2, No. 5, pp. 105-112.
[20]	Rahimi, Reza. (2014). Effect of Using Different Rock Failure Criteria in Wellbore Stability Analysis, Scholars Mine Master’s Thesis, Paper 7270.
[21]	Nawrocki, P. A. (2010). Critical wellbore pressures using different rock failure criteria. ARMA/USRMS 05-794. In proceeding of ISRM International Symposium and 6th Asian Rock Mechanics Symposium, New Delhi, India, 23-27.
[22]	Yi, X., Ong, S. H., Russel, J. E. (2005). Improving borehole stability analysis by quantifying the effects of intermediate principal stress using polyaxial rock strength test data. ARMA/USRMS 05-794, Alaska, 25-29 June, 2005.
[23]	Yoshida, C., Ikeda, S., Eaton, B. A. (1996). An Investigative Study of Recent Technologies Used for Prediction, Detection, and Evaluation of Abnormal Formation Pressure and Fracture Pressure in North and South America, IADC/SPE Asia Pacific Drilling Technology Conference, Kuala Lumpur, 9-11 Sept. pp 131-151, IADC/SPE 36381.
[24]	Richard Bronson, Govindasami Naadimuthu. (1997). OPERATIONS RESEARCH, Second Edition, SCHAUM`S outlines, McGraw-Hill Company, ISBN: 978-0-07-178350-7, pp 281-289.