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Showing 1 to 2 of 2 for “"shale strength"”.
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Wellbore stability in water-sensitive shales
… problem, especially when drilling in deep, low strength shale formations at high temperature and pressure. The instability can be caused by the high compressive effective stress or tensile stress due to the stress concentration and pore pressure increase while drilling. In addition to the …
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Borehole Breakouts in Transversely Isotropic Posidonia Shale
… drilling through finely laminated, organic rich shales (Økland and Cook, 1998; Ottesen, 2010; etc.); such instabilities should be avoided to assure a successful exploitation and safe production of the contained unconventional hydrocarbons. Borehole instabilities, such as borehole breakouts or …