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Mechanical Anisotropies of Shale
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Fourth EAGE Shale Workshop, Apr 2014, Volume 2014, p.1 - 3
Abstract
Summary
Laboratory experiments have been performed with a number of shale samples, including commonly studied outcrops like Pierre and Mancos Shale. The angular dependences of unconfined strength, friction angle, static E-modulus and P-wave velocity have been measured and modelled. The anisotropy of the ratio between dynamic and static moduli is found to represent plastic / brittleness anisotropy. Stress and stress path dependent velocity anisotropy will be shown and related to possible 4D seismic applications. Implications for field applications to borehole stability and fracturing will be discussed.
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