Well orientation effect on borehole stability

Nobuo Morita

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Citations (Scopus)

Abstract

Using laboratory and field borehole stability data, an empirical correlation of borehole size and stress gradient effects is derived. Using the correlation, the well orientation effect on borehole stability is numerically studied. The study shows that the borehole stability is controlled, under the normal condition, by the largest in-situ stress in the radial borehole direction so that the borehole orientation effect for a horizontal well is not significant if two horizontal stresses are less than the vertical overburden pressure, however, if one horizontal stress is greater than the vertical stress, the orientation significantly affects the borehole stability.

Original languageEnglish
Title of host publicationProceedings - SPE Annual Technical Conference and Exhibition
Pages449-460
Number of pages12
Publication statusPublished - 2004
Event2004 SPE Annual Technical Conference and Exhibition - Houston, TX
Duration: 2004 Sep 262004 Sep 29

Other

Other2004 SPE Annual Technical Conference and Exhibition
CityHouston, TX
Period04/9/2604/9/29

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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  • Cite this

    Morita, N. (2004). Well orientation effect on borehole stability. In Proceedings - SPE Annual Technical Conference and Exhibition (pp. 449-460). [SPE 89896]