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Evaluation of borehole stability with lack of reliable information about geomechanical characteristics of rocks

Authors: Yu.A. Kashnikov, S.G. Ashihmin, D.V. Shustov, S.E. Chernyshov (Perm National Research Polytechnical University, RF, Perm)

Keywords: geomechanics, well, geomechanical modeling, method of final elements, stability.

Results of modeling stability of controlled directional wells borehole drilled through the unstable beds with lack of reliable information about geomechanical characteristics of rocks are presented. The program complex in which is realized the elasto-plastic transversal-isotropic medium with Mohr-Coulomb yield criterion and taking into account possibility of shifts by bedding was used.

References
1. Bulychev N.S., Mekhanika podzemnykh sooruzheniy (Mechanics of underground constructions), Moscow: Nedra Publ., 1982, 270 p.
2. Zoback M., Reservoir geomechanics, Cambridge University Press, 2007.
3. Morales R.H., Marcinew R.P., Fracturing of high-permeability formations:
mechanical properties correlations, SPE 26561, 1993.
4. Fjær E., Holt R.M., Horsrud P. et al., Petroleum Related Rock Mechanics, Elsevier, 2008, Part 1, Paris: Editions Technip, 1993, 360 p.
5. Charlez F.R., Rock Mechanics, Petroleum applications, 1997, V. 1, 2.
6. Christensen H.F., KГҐgeson-Loe N., Plischke B. et al., Impact of the intermediate principal stress on rock strength: polyaxial testing and numerical simulations, Proceeding of North American Rocks Mechanics Symposium, no. 04- 469 Houston, TX, 2004.
7. Plischke В., KГҐgeson-Loe N., HavmГёller O. et al., Analysis of MLW open
hole junction stability, American Rock Mechanics Association, 2004,
ID ARMA-04-454.
8. Kashnikov Yu.A., Ashikhmin S.G., Mekhanika gornykh porod pri razrabotke mestorozhdeniy uglevodorodnogo syr'ya (Rock mechanics in the development of hydrocarbon fields), Moscow: Nedra Biznes-tsentr Publ., 2007, 476 p.
9. Ashikhmin S.G., Kukhtinskiy A.E., Simulation of stress-deformed state of open well (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo, 2014, no. 11, pp. 99–104.

Keywords: geomechanics, well, geomechanical modeling, method of final elements, stability.

Results of modeling stability of controlled directional wells borehole drilled through the unstable beds with lack of reliable information about geomechanical characteristics of rocks are presented. The program complex in which is realized the elasto-plastic transversal-isotropic medium with Mohr-Coulomb yield criterion and taking into account possibility of shifts by bedding was used.

References
1. Bulychev N.S., Mekhanika podzemnykh sooruzheniy (Mechanics of underground constructions), Moscow: Nedra Publ., 1982, 270 p.
2. Zoback M., Reservoir geomechanics, Cambridge University Press, 2007.
3. Morales R.H., Marcinew R.P., Fracturing of high-permeability formations:
mechanical properties correlations, SPE 26561, 1993.
4. Fjær E., Holt R.M., Horsrud P. et al., Petroleum Related Rock Mechanics, Elsevier, 2008, Part 1, Paris: Editions Technip, 1993, 360 p.
5. Charlez F.R., Rock Mechanics, Petroleum applications, 1997, V. 1, 2.
6. Christensen H.F., KГҐgeson-Loe N., Plischke B. et al., Impact of the intermediate principal stress on rock strength: polyaxial testing and numerical simulations, Proceeding of North American Rocks Mechanics Symposium, no. 04- 469 Houston, TX, 2004.
7. Plischke В., KГҐgeson-Loe N., HavmГёller O. et al., Analysis of MLW open
hole junction stability, American Rock Mechanics Association, 2004,
ID ARMA-04-454.
8. Kashnikov Yu.A., Ashikhmin S.G., Mekhanika gornykh porod pri razrabotke mestorozhdeniy uglevodorodnogo syr'ya (Rock mechanics in the development of hydrocarbon fields), Moscow: Nedra Biznes-tsentr Publ., 2007, 476 p.
9. Ashikhmin S.G., Kukhtinskiy A.E., Simulation of stress-deformed state of open well (In Russ.), Vestnik Permskogo natsional'nogo issledovatel'skogo politekhnicheskogo universiteta. Geologiya. Neftegazovoe i gornoe delo, 2014, no. 11, pp. 99–104.


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