 |
Chapter 14
*
Importance
of a Geological Framework and Seismic Data Integration for
Reservoir Modeling and
Subsequent
Fluid-Flow PredictionsWilliam M. Bashore
Udo G. Araktingi
Reservoir Characterization
Research and Consulting, Inc.
Fullerton, California,
U.S.A.
Marjorie Levy
William J. Schweller
Chevron Petroleum Technology
Company
La Habra, California,
U.S.A.
*
ABSTRACT
Fluid-flow simulation results
are used extensively as reservoir performance predictions upon which to
base economics for reservoir management decisions. The generation of numerical
models for simulation purposes may be easily facilitated by computer-aided
algorithms, regardless of the quality of data or input parameters . This
study contrasts two different geological interpretation styles: lithostratigraphic
and chronostratigraphic. Specifically, comparisons are made as to properly
integrating seismic-based information and to potentially erroneous conclusions
deduced from simulator predictions if the simulation models are built without
a sound geological framework. Models derived from the two different correlation
strategies using only well logs are compared. Seismic inversions are included
within the chronostratigraphic framework as a third model type. Multiple
realizations of each model type are input to a fluid-flow simulator. Selecting
the appropriate simulation results is closely tied to the reservoir management
objective in question. Histograms of breakthrough times indicate little
difference between the well-only models of either correlation strategy,
whereas water displacement patterns are significantly different. Models
that have been conditioned by the seismic pseudologs show substantially
different results for both breakthrough and displacement distributions,
and the spread or uncertainty in breakthrough estimates is greatly reduced
compared to the well-only model results.
|
---|