A detailed study is presented of a case of stress induced wellbore breakouts observed where none of the principal axes of the tectonic stresses coincides with a wellbore axis. The observed depth and azimuth of breakout occurrence were compared with theoretical predictions based on the elastic stress field induced around a wellbore in a generalized 3-D stress field. The stress field had previously been studied using 3-D hydrofrac stress measurement. Results show that, when the uniaxial compressive strength of the rock is known, the depth and azimuth of breakout occurrence can be used as a reliable method to confirm the tectonic stress magnitudes determined by hydraulic fracturing.
|Number of pages||6|
|Journal||JSME International Journal, Series 1: Solid Mechanics, Strength of Materials|
|Publication status||Published - 1992|
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