Page 130 - Open-Hole Log Analysis and Formation Evaluation

Relative Permeability Percent 116 |
ao oo 100
oe eo
irreducible
20
0

Water
hk,
a, Il.
is

of
re
20
Water

and
that
table
Saturation
i t i
refers
FIGURE
reflects
note
Many
Ifa well
different

Kro ™~ \ t ‘ ' METHODS
to
reservoir
equations
difference
6.11
= ‘(Cs
0.9
Pirson
is
are
occurs
decreasing,
-
~
to
increasing.
et
the
at
subjects
as

cases.

al.
workers
{-—s
after
|
those
the
saturation
S,,\?
relate
it
case
in
Saturation:
between
:
when
Imbibition
k,,
has
cited
this
(1964).
and
the
oil
irreducible
Oil
Oil
history
A
in
and
For example,
where
transition
| OF ANALYSIS AND APPLICATION OF RESULTS
in
been
field

nw
two
first
and
the
water
Percent
Driven
Water-Wet
Water-Wet
&,,,to
Migrates
the
=
zone
have
sets
out
and Drainage.

Sy,
to
of
into
commonly
Honarpour
(
of
imbibed.
System
System
Pore
migrates
S,,;,
After

et
Sy w —
is completed above the transition

saturation
saturation
used
trapping

al.
into
and
-—\sme!
— Sau
proposed

of
pi
Sins
a

)
am
(and

S,,.
Space
imbibition
of the
the
a water-wet reservoir,
Core Labs.

Figure.6.11
(1982),
thus

l

j

a rise

:

water-wet
generalized
of water.
&,,,, =
approximation
in
Oil
wetting
Molina
zone, which means
relative-permeability
0),
nonwetting
illustrates
rock:
gives
fluid
thes
:
that the
Drainage
(1983),
water
phase
is
the water
curves
The
empirical
Particularly worthy
Saturation

to
on
107

Each
used.
10°
agree.
=
=
the
to
analysis
=
is
one
borehole
ft?.
be
is
in
This
qu/
magnitude,
10°
order
method
so
determination
ft’.
of the
(Gu
WOR/(1
of 1
logging:
| Core analysis Wireline Borehole gravimetrics Porosity may be measured by a variety of methods including: MEASUREMENT + WORB,/(B, WO= (8) of the oil and water, so the complete expression will be Surface watercut will be a function of the formation volume factors WC which WC be given by The actual watercut (WC) of the production into the wellbo
+
porosity estimates
Wireline
+
chapter
one
Core analysis
equivalent
to
general
from
OF
hytto/ kobe
produced.
gravimeter
From
10
26.
4G)
comforting
to:
ratio
to
ft’,
investigates
should
logging
WOR).
one
a
generalized
problem
wireline
samples
not
is
(WOR)
know
POROSITY
tools
WORB,)
logs
be
very
is
in
If completion
extreme
is
is

different
depending
investigates much
to
using different tools
large
on
given
correlations.
enlarged
the
investigate
follows:
by
the
advance
on
covered
a
needlessly
volume
in
in
of
volumes
other
what
contemplated
much
on
specific
the
lie
in

and techniques

smaller volumes,
surprised
chapter
the
chapter
to
the
nine
22
20.
watercut
porosity
order
ranging
formation.
and
learn
may
of
orders
be
transition
that
core
Porosity
do not always
from
10°
The
device
smaller volume,
of