Page 131 - Open-Hole Log Analysis and Formation Evaluation

Relative Permeability
oo
eo
irreducible
20

Water
hk,
of
re
20

and
that
Saturation
'
t ‘
a,
reflects
note
Many
Ifa well
different

reservoir
to

equations
0.9
difference
= ‘(Cs
Pirson
are
is
occurs
-
~
to
increasing.
et
the
\
at
cases.

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

two
and
water
Driven
Percent
&,,,to
the
zone
=
have
sets
out

Sy,
to
of
commonly
Honarpour
(
of
imbibed.
Pore
S,,;,

et
is completed above the transition
Sy w —
saturation
saturation

trapping
used
al.
and
proposed
— Sau

Sins
of
pi

)

(and

S,,.
Space
of the
the
Figure.6.11

(1982),
thus

l
j

:

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

be
to
on
WC
The
107

from
Each
used.
10°
which
agree.
The
WO=
=
=
the
cannot
to
Surface
analysis
=
is
given
one
borehole
ft?.
be
water
is
in
qu/
This
by
magnitude,
10°
actual
order
method
determination
so
flow
ft’.
(Gu
WOR/(1
of the
watercut
of 1
| Core analysis a water-wet rock: The as when oil first migrates into decreasing, Wireline fluid the refers Borehole gravimetrics imbibition subjects table the water a water-wet reservoir, a rise in is Porosity may be measured by a variety of methods including: MEASUREMENT Core Labs. and Drainage. After FIGURE 6.11 Imbibition Water 0 (8) of the oil an
logging:
+
porosity estimates
Wireline
chapter
+
one
Core analysis
rate
to
equivalent
general
WORB,/(B,
from
hytto/ kobe
OF
produced.
gravimeter
will
watercut
From
is
26.
10
+
4G)
comforting
to:
be
ratio
to
ft’,
a
investigates
should
logging
one
¢,
WOR).
a
generalized
wireline
problem
=
samples
not
is
know
(WOR)
POROSITY
WORB,)
tools
(WC) of the
logs
be
very
is
If completion
in
function
extreme
is
is

depending
different
investigates much
to
using different tools
large
on
given
correlations.
enlarged
of the
pL.
ky,ADA/p
the
investigate
follows:
by
advance
the
on
covered
a
needlessly
volume
production
in
in
volumes
of
other
what
into
much
contemplated
on
specific
the
formation
lie
in
the

and techniques

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