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Mechanical Anisotropy Characterization of the Draupne Formation, North SeaNormal access

Authors: E. Skurtveit, J.C. Choi, M. Soldal, L. Grande, R. Maurer and P. Horsrud
Event name: Fourth International Conference on Fault and Top Seals
Session: Top Seals and Caprocks I
Publication date: 20 September 2015
DOI: 10.3997/2214-4609.201414078
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 908.65Kb )
Price: € 20

Summary:
Anisotropy is an important characteristic for the mechanical characterization of shale. Both strength and elastic parameters vary with orientation of material due to the lithological anisotropy in the material. A triaxial test program on varying plug orientation was designed to investigate the mechanical anisotropy in the Draupne Formation. From the triaxial experiments, clear strength anisotropy is observed especially in certain range of orientation. Post-test CT images shows that the strength anisotropy is mainly related to failure in bedding planes. The observed strength anisotropy implies that orientation dependent failure criteria should be considered for realistic geomechanical modelling of seal integrity.


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