Page 125 - Open-Hole Log Analysis and Formation Evaluation

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Water
Continuous
Reservoir
Water
Water-Wet
Continuous
at
Oil/Water
Reservoir
Transition
at
phase
Saturation
phase
is
F TGURE
Zone
is
Contact
Saturation
Reservoir
100%
Irreducible
oil.
6.4
water.

0

Fluid Distribution
y
in
of
a
-

\
—-
Pore
\—>
P.=
Oil
s
Water-Wet Reservoir.
Pressure
LO Water Saturation
Pressure
%
Capillary
Gradient
Water Gradient
———>
—'

100

.
6.
. 111 OF RESULTS APPLICATION OF ANALYSIS AND I. METHODS 110
The
the
The
The
The
zone
‘gets,,
Given
this
TE
and
gas/oil
ait
FIGURE
in
throats.
THE
capillary
When
a
in
6.5
reservoir
the
otherwise
radius,
density
these
Inspection
contact
case)
r,
Thus,
be
this
contact
pores—which
interfacial
PHYSICS
rock.
action
a
figure
fluids
ICS
the
is
act
OF
meability will have
angle,
of this
will
reservoir.
6.5
Capillary
we
factors,
of the
6,
it
be
like
difference
tension,
see
is
with
100%-oil
pore
laboratory
T,
OF ROCK/
Tribe in
oil,
equation
that
controlled
Reservoirs
shorter
between
between
simple
by
throats
column
short transition
the
water
to
with
than
between

maximum height,
the
the
.
by
tiny tubes—in
4,
can
observation
the
that
;
the
SYSTEMS
large
the
zones,
be
is
predict
at
wetting
an
hep
water with water,
the
rock
.
pore
following
fluid

phases-€p,,-
drawn
and the
and
capillary
rey
two phases
up
length
p,
translated
system.
the
throats
factors:
(water
oil/water
. larger b the smaller r gets, that the shows Water. ROCK/FLUID
(oil
in
effect
into
in
We
of a
and
into
this
can
what
this
of the
high
contact
tube with
transition zone
case)
terms
and water
due
per-
case)
at a
transition
in

to which water can be raised by
pore
equate
small
would

of