Characterization
of Flow Patterns in Turbidite Reservoirs Using 3-D
Modeling
of an Outcrop Analog, Ainsa Sub-Basin, South
Central Pyrenees, Spain
Labourdette, Richard1, Patrice Imbert1,
Philippe Crumeyrolle1, Eduard Remacha2
(1) Total S.A,
Hydrocarbon
recovery in clastic reservoirs depends in good part
on the quality of our understanding of the precise architecture of the sandbodies and the intervening shaly
baffles and barriers. The complexity of hydrocarbon reservoirs and the
uncertainties linked with the limitations of our investigation methods often
make it convenient to develop and test concepts on better imaged equivalent
outcrops. In the example shown, the issue was to define the main types of
sedimentary heterogeneity that could be expected in a turbidite
field from Seismic
interpretation
shows that its overall architecture was that of a Laterally Offset Stacked
Channel complex (ref.), but
seismic
resolution cannot go beyond that stage of
interpretation. Analogue outcrops in
modeling
of the field. In
particular, the influence of various types of heterogeneity (debris flow drapes
at the base of individual channels, high permeability drains in the sandy
channel-fill, geometric relationships and reservoir communication between
channels and the associated levees, etc.) was tested using petrophysical
parameters derived from the oil field so as to focus the final full-field
modeling
on the most significant ones, thereby simplifying the process. A
seismic
model of the outcrop was also carried out (once again using petroacoustic parameters from the oil field) so as to help
interpret precisely the stratigraphic relationships
on
seismic
, in particular pick the channel – levee boundary with the highest
possible precision.