10.11440070019_si_002.mov (65.73 MB)
2. Grès d'Annot Formation, SE France (Tomasso et al.)
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posted on 2020-01-14, 11:03 authored by K.J.W. McCaffrey, D. Hodgetts, J. Howell, D. Hunt, J. Imber, R.R. Jones, M. Tomasso, J. Thurmond, S. ViseurSalt withdrawal minibasins contain significant petroleum reservoirs in many petroleum provinces around the
world, such as the deep northern Gulf of Mexico and offshore Brazil. These minibasins are typically
connected by large canyon-like channels that serve as conduits for sediment gravity flows bypassing from
proximal basins into adjacent distal basins. The Grand Coyer sub-basin of the Eocene–Oligocene
Grès d'Annot Formation of the southwestern French Alps provides an excellent outcrop analogue
of an interbasinal conduit that connects the proximal southern Annot sub-basin to the distal northern Trois
Evéchês sub-basin. Stratigraphic columns, palaeocurrent, photomosaic and lidar data were
collected to address the stratigraphy of the conduit. This virtual fieldtrip visits several of the key
exposures around the Grand Coyer sub-basin, illustrating and analysing the stratigraphic packaging moving
from lower to upper fill, from axis to margin, and from proximal to distal deposition. Using a detailed,
outcrop-based geological model of the conduit, large (field) scale forward seismic models are used to
contrast the geometries that we see in the outcrop with those that we would resolve on seismic images.
Lessons learned from these exposures could be used to better predict sand distribution and reservoir
geometry within interbasinal conduits.
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interbasinal conduitfieldtrip visitsSalt withdrawal minibasinsoutcrop analoguepetroleum provincesSE France2. Gr èslidar dataFormationsand distributionStratigraphic columnsAnnot sub-basinreservoir geometryinterbasinal conduitsstratigraphic packagingGrand Coyer sub-basinsediment gravity flowsFrench AlpsTrois Ev éch sub-basinpetroleum reservoirscanyon-like channelsexposuremodelGeology