Reservoir
Characterization, Modeling and Simulation of a Braided Channel Complex at
Cambridge Cove,
Mulcahy, Peter1, Yawooz
Kettanah1, Lawrence Plug1, Hasley Vincent1,
Grant D. Wach1 (1) Dalhousie University,
Cambridge Cove represents a braided
channel complex where the Triassic Wolfville Formation lies unconformably over
the Carboniferous Horton Group in the Minas subbasin of the Fundy basin. 3-D
exposures of bars in the intertidal zone have been preserved due to diagenesis
caused by meteoric waters perched on the impermeable Horton shales. The section
can also be viewed in 2-D along the 8-14m cliff face section. The strata
comprise red to brown, coarse to fine grained sandstones, pebbly sandstones,
conglomerates, minor shales and exhibits a fining upward trend.
Geological reservoir model data input
included a detailed and high accuracy topographical GPS survey, outcrop
descriptions, fault analysis, paleocurrent measurements, photographs, samples
for petrographic analysis. These data were supplemented with aerial
photographs, digital elevation models and an airborne LiDAR survey. The GPS
survey consisted of 17,000 data points outlining the topography of almost every
barform.
The data imported into Petrel™ consisted
of survey data for the physical dimensions of the reservoir, geological data
for reservoir characterization, and petrophysical data used for volume
calculation and reservoir simulation. The reservoir model incorporated field
data as well as analogue data from a similar braided channel complex. The
braided channel complex was modeled with varying geological properties for
different facies in the channels. After the creation of the reservoir model,
and entry of fluid properties, a volume calculation of several factors
including reservoir net volume, pore volume, and fluids in place were generated
and an optimum depletion strategy was designed for the modeled reservoir.
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California