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The paper analyzes the impact of bedding plane orientation on wellbore failure in laminated shale, revealing a U-shaped strength envelope for anisotropic rock under varying confining pressures. It identifies a risk zone for borehole failure with specific inclination and azimuth ranges, highlighting the importance of understanding weak bedding planes in drilling operations. The study emphasizes that wellbore instability is exacerbated when drilling parallel or sub-parallel to these weakness planes.

Author

tranquanlong51024

Language

EN