Reservoir compartmentalization, whether structural or stratigraphic, is
one of the most prominent parameter for accurately characterizing the
distribution of hydrocarbons in the subsurface and it is a key element for
optimizing hydrocarbon recovery. In order to accurately characterize its
compartmentalization, a new volume-based structural modeling technique have
been applied for generating a geocellular model of the complex, highly faulted
east flank of the studied field (Sabah, Malyasia). Benefits over existing
pillar-based and surface-based techniques are discussed.
The volume-based modeling technique consists of interpolating a
continuous 3D property representing the relative stratigraphic age of the
formations from all available well and seismic interpretation data. A
watertight structural framework composed of faults and horizon surfaces is then
extracted from this property, and converted to a geocellular grid in which the
faults are stair-stepped. New workflows were developed for early integration of
fluid distribution and production data during the creation of the geological
framework, leading to an accurate delineation of fault compartments.
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