Borehole instabilities in the KTB main borehole

Journal of Geophysical Research: Solid Earth

Volumn 102, Issue B8, 1997, Pages 18507-18517

  Borm, G ^a   Engeser, B ^b,e   Hoffers, B ^b,e   Kutter, H K ^c   Lempp, C ^d  

^a GFZ GERMAN RESEARCH CENTRE FOR GEOSCIENCES   (Germany)

^b Niedersachsisches Landesamt B   (Germany)

^c RUHR UNIVERSITY BOCHUM   (Germany)

^d MARTIN LUTHER UNIVERSITY HALLE WITTENBERG   (Germany)

^e Niedersachsisches Landesamt B   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

BOREHOLE BREAKOUT; BOREHOLE INSTABILITY; DEEP DRILLING; FRACTURE; KTB BOREHOLE;

GERMANY, BAVARIA, KTB SITE;

EID: 0031420618     PISSN: 21699313     EISSN: 21699356     Source Type: Journal    
DOI: 10.1029/96jb03669     Document Type: Article

References (22)

1. Althaus, E., A. Friz-Töpfer, C. Lempp, Ch., and Natau, O., Effects of water on strength and failure mode of coarse-grained granites at 300°C. Rock Mech. Rock Eng., 27(1), 1-21, 1994.
2. Borm, G., C. Lempp, O. Natau, and T. Röckel, Instabilities of borehole and drillcores in crystalline rocks, with examples from the KTB pilot hole, Sci. Drill., 1, 105-114, 1989.
3. Brudy, M., M.D. Zoback, K. Fuchs, F. Rummel, and J. Baumgärtner, Estimation of the complete stress tensor to 8 km depth in the KTB scientific drill holes: Implications for crustal strength, J. Geophys. Res., this issue.
4. Chur, C., T. Bendzko, B. Engeser, A. Sperber, T. Tran Viet, and L. Wohlgemuth, KTB - 4 years experience at the limits of drilling technology,. Soc. Petr. Eng./ Int. Ass. Drill. Contr., paper 29412, Richardson/Texas, 1995.
5. Emmermann, R., Abenteuer Tiefbohrung - Eine Zwischenbilanz zum Abschluß des Kontinentalen Tiefbohrprogramms der Bundesrepublik Deutschland (KTB), Geowissenschaften, 13, 114-128, 1995.
6. Engeser, B., T. Tran Viet, and L. Wohlgemuth, KTB-experiences applicable in conventional deep drilling technology. Oil Gas, 3, 12-18, 1995.
7. Gough, D.I., and J.S. Bell, Stress orientations from borehole wall fractures with examples from Colorado, east Texas, and northern Canada, Can. J. Earth Sci., 9, 1315-1370, 1982.
8. Hirschmann, G. and M. Lapp, M, Evaluation of the structural geology of the KTB Hauptbohrung (KTB Oberpfalz HB), KTB Rep. 94-1, pp. 285-308, Niedersächsisches Landesamt für Bodenforschung, Hannover, Germany, 1995.
9. Hoffers, B., B. Engeser, and H. Rischmüller, Wellbore stability of a superdeep borehole in crystalline rock. The KTB-Hauptbohrung, Germany, in Proceedings Eurock '94, pp. 371-378, A.A. Balkema, Rotterdam, Netherlands, 1994.
10. Huenges, E., B. Engeser, J. Kück, C. Kamm, and G. Zoth, Formation-pressure down to a depth of 8.7 km in the Kontinentale Tiefbohrung (KTB), Sci. Drill., 5(1), 17-21, 1995.
11. Juhlin, C., Rock Mechanics, in Scientific summary report of the deep gas drilling project in the Siljan Ring impact structure, 205-217, Rep. Vattenfall U(G) 1991/14, Vällingby, Sweden, 1991.
12. Kozlovsky, Y.A., The world's deepest well, Sci. Am., 251(6), 98-104, 1984.
13. Kutter, H.K., Influence of drilling methods on borehole breakouts and core disking, in Proc. Int. Congr. Rock Mech. Aachen, 7th (3), pp. 1659-1664, A.A. Balkema, Rotterdam, Netherlands, 1991.
14. Kutter, H.K., and H. Rehse, Laboratory investigation of factors affecting borehole breakouts, in Proceedings EUROCK '96, pp. 751-758, A.A. Balkema, Rotterdam, Netherlands, 1996.
15. Lempp, C., Experimentelle Untersuchungen zur geomechanischen Wirkung von Gesteinsfluiden. Veröff. 135 Inst. für Bodenmechanik und Felsmechanik, Univ. Fridericiana, Karlsruhe, Germany, 1994.
16. Lempp, C., O. Natau, A. Holl, and E. Althaus, Influence of fluids on the stability of the KTB open hole below 6000 m, KTB-Rep. 93-2, pp. 179-182, Niedersächsisches Landesamt für Bodenforschung, Hannover, Germany, 1993.
17. Mastin, L.G., B. Heinemann, A. Krammer, K. Fuchs, and M.D. Zoback, Stress orientation in the KTB pilot hole determined from wellbore breakouts, Sci. Drill. 2, pp. 1-12, 1991.
18. Pechnig, R., G. Zimmermann, J. Wohlenberg, S. Haverkamp, and H. Burkhardt, Integrated log interpretation in the German Continental Deep Drilling Program: Lithology, porosity, and fracture zones. J. Geophys. Res., this issue.
19. Röckel, T., Der Spannungszustand in der tieferen Erdkruste am Beispiel des KTB Programms. Veröff. 136 Inst. für Bodenmechanik und Felsmechanik, Univ. Fridericiana, Karlsruhe, Germany, 1995.
20. Tran Viet, T., and C. Figgemeyer, Experience with the KTB-drilling fluid since the conversion to the Pyrodrill System. KTB-Rep. 93-1, pp. 565-568, Niedersächsisches Landesamt für Bodenforschung, Hannover, Germany, 1993.
21. Vernik, L., M.D. Zoback, and M. Brudy, Methodology and application of the wellbore breakout analysis in estimating the maximum horizontal stress magnitude in the KTB pilot hole, Sci. Drill., 3, 161-169, 1992.
22. Zheng, Z., and N.G.W. Cook, Generation and analysis of stable wellbore cross-sections, Eos Trans. AGU, 66, 1056, 1985.