干酪根
油页岩
延展性(地球科学)
材料科学
地质学
断裂(地质)
复合材料
烃源岩
构造盆地
蠕动
古生物学
作者
Laurent Brochard,György Hantal,Hadrien Laubie,Franz‐Josef Ulm,Roland J.‐M. Pellenq
标识
DOI:10.1061/9780784412992.288
摘要
In this work we study role of kerogen in the fracture properties of organic-rich shales and, in particular, in the ductility of shales. The presence of kerogen and clays in shale is known to increase the ductility. We propose here a multiscale approach to develop a fine understanding of shale ductility from the molecular scale. We develop and validate a methodology at the molecular scale that can capture the toughness and ductility of a material. We apply this methodology successfully to a silica polymorph and to a kerogen analog, and we confirm the significant ductility of kerogen. Interestingly the silica-kerogen interface exhibits a similar ductility, which is central for the properties of the heterogeneous shale. Finally, we consider a tentative upscaling considering the pull out phenomenon as a likely mechanism of fracture of the shale.
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