Print this pageAbstract: 
Reservoir
Characterization of Fluvial Sandstones for Reservoir Simulation, North
Central Africa
DRUMHELLER, RICHARD E; ROBERT P. DANIELS; JEFFREY M. YARUS
The reservoir characterization
of fluvial sandstones from the braid-plain environment in north central
Africa presents the challenge commonly faced early in the development sequence
of petroleum reservoirs: a significant lack of specific local reservoir
data.
The essential description of
the reservoir necessary for proper production planning includes log and
core data from the first few wells, indistinct local seismic information,
preliminary production test data, which are complemented by extensive regional
but general studies of the sandstones, and by analogy with apparently similar
fields elsewhere. The data was incorporated into 3D stochastic models as
it became available, and numerous geostatistical realizations were constructed
for eventual use in mapping and reservoir simulation studies. The output
from the stochastic modeling has proven very useful for all types of reservoir
simulation, both 2D and 3D. Local, very detailed extracts of the model
provided engineering models the sort of information needed to more correctly
simulate reservoir behavior in a compartmentalized, heterogeneous system.
The modeling products provided an important influence on initial sets of
conventional deterministic geologic maps, constructed for the benefit of
production planning, and for an enhanced geological understanding to be
applied to local field development and to further exploration in the region.
Geostatistically based stochastic
modeling requires and fosters good cooperation and communication among
various disciplines: geology, geophysics, petrophysics, reservoir engineering,
and production engineering, and has proven to be very useful in the proper
description of complicated reservoir
systems.
AAPG Search and Discovery Article #90942©1997 AAPG International Conference and Exhibition, Vienna, Austria