Geostatistical compairson of geotechnical properties; Orphan Basin, St. Pierre and Scotian Slopes
Valerie Latour, Kevin MacKillop, Perry Mitchelmore, Dave Mosher
In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical EngineeringSession: Other General
ABSTRACT: Oil and gas exploration in Eastern Canada has included deep water regions of the Orphan Basin, St. Pierre slope and Scotian slope. The Geological Survey of Canada, in collaboration with non-government agencies, has undertaken a program to understand deep water margin geologic processes and potential geohazards. Short (<10 m) piston cores have been analysed to assess the geology, geotechnical properties, stress history, and static failure potential. Material properties for density, composite lab minivane and shipboard torvane undrained shear strength are assessed using random field theory to characterize the three regions separately. A slope stability analysis of near surface sediments was evaluated using the infinite slope method to assess the probability of slope failure for each region using a total stress analysis. This paper compares the three regions for common and anomalous characteristics and trends.
RÉSUMÉ: Les explorations pétrolières dans l™Est du Canada se sont étendues aux régions hauturières du Bassin d™Orphan, des pentes de St Pierre et de la Nouvelle-Ecosse. La Commission Géologique du Canada, en collaboration avec des agences non gouvernementales, a engagé un projet d™étude sur la compréhension des processus géologiques en domaine océanique profond et les risques potentiels associés. De courtes carottes (<10 m) ont été analysées afin d™en déterminer la géologie, les propriétés géotechniques, l™histoire des contraintes, et le potentiel de rupture statique. Les propriétés matérielles pour la densité, les mesures non drainées des forces de cisaillements sur des échantillons minivan de laboratoire et torvane prélevés à bord du navire, sont déterminées en utilisant des champs théoriques aléatoires pour caractériser séparément les trois régions. Une analyse de stabilité de pente à proximité des sédiments de surface a été effectuée à contrainte totale en utilisant la méthode de la pente infinie afin d™évaluer la probabilité de rupture de pente pour chaque région. Cet article compare les caractéristiques communes, les anomalies et les tendances de ces trois régions.
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Valerie Latour; Kevin MacKillop; Perry Mitchelmore; Dave Mosher
(2011) Geostatistical compairson of geotechnical properties; Orphan Basin, St. Pierre and Scotian Slopes in GEO2011. Ottawa, Ontario: Canadian Geotechnical Society.
@article{GEO11Paper921,
author = Valerie Latour; Kevin MacKillop; Perry Mitchelmore; Dave Mosher
,
title = Geostatistical compairson of geotechnical properties; Orphan Basin, St. Pierre and Scotian Slopes ,
year = 2011
}
title = Geostatistical compairson of geotechnical properties; Orphan Basin, St. Pierre and Scotian Slopes ,
year = 2011
}