Samsoedin Nasoetion's report
by
Samsoedin Nasoetion, MSE
University of Texas at Austin, 2000
Supervisor: Mark A. Miller
Steamflood technology for recovery of heavy oil has been widely implemented and
successful. However, steamflooding of light oil reservoirs (light oil steamflood
or LOSF) has not been widely implemented. In addition, in light oil reservoirs
waterflooding is widely applied as a secondary recovery process. Hence, there is
an interest in studying LOSF in a light oil reservoir as a continuation EOR
process after waterflood.
This study reviews the recovery processes of LOSF after waterflood in a
multi-layer sandstone of deltaic environment. Included is a study to evaluate
grid effects on waterflood and steamflood performance. This study uses CHEARS,
Chevron's compositional simulator, as a tool to study various parameters
(completion interval, injection rate, and bottom hole production pressure) for
their effect on waterflood and steamflood performance.
Results from this work suggest that using grid block aspect ratios near one
appears to minimize grid size and grid orientation effects. For waterflooding,
local geological conditions govern the effectiveness of the displacement process.
The steamflood process was able to displace by-passed oil by waterflood because
of steam's tendency override and provide a more efficient displacement front.
Steam injection rate and steam quality reduction as well as completion interval
adjustments in high permeability zones can also assist in improving oil recovery
and project economics.
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