Geoscience Reference
In-Depth Information
Producing well in oil
saturated reservoir
Saturation effect
Pressure effect
Gas ex-solved from
solution as pressure
drops below bubble
point. Seismic velocity
(P) and density
decrease
Decrease in pore
pressure increases
seismic (P) velocity
and density
Fig. 8.1
Rock property changes around a producing well.
Water injector well in
oil saturated reservoir
Saturation effect
Pressure effect
Water replaces oil
around injector,
increasing density and
seismic (P) velocity
Increase in pore
pressure reduces
seismic (P) velocity
and density
Fig. 8.2
Rock property changes around a water injector.
flow, both vertically (e.g. shale bands too thin to resolve on seismic) and horizontally
(e.g. faults that may be visible on seismic but whose sealing capacity may not be easy
to estimate). Although some understanding of these barriers can be obtained from the
observed fluid flow in producing wells, in many cases this will not give sufficient lateral
