Page 143 - Open-Hole Log Analysis and Formation Evaluation

_
~ Porosity x)
WN
mw
%
Ww
.
--
So
So
Oo
120
Wilcox
Miocene
Pleistocene
Frio Olmos
ort
niw
to
3
let
.
Red
one
us
those
Strawn,
FIGURE
Morrow,
attempt
swim
Cave
calculate
side
provided
see
Averaging
6.21
saturation,
or
Mississippi
to
Tubb
Cotton Valley,
is
AVERAGING
Mb LHODS
to
Austin
is
4.5.
them
3
and
the
X
some
a
UF
ft,
and
Chalk
who are now
Bromide,
drown.
other
:
completions
S,,; for
but
permeability
at
if
So
10
is
.
ANALYSIS
Atoka,
that
S,,
how we
dangerous
completions
New
is
low.
when
AND
in
use
does
Water Saturation %
enlightened.
we
Woodbine
not
20
Orleans
greater
zones
pastime.
.
and
them.
talk
*
average permeability we
Various Formations.
of
mean
10
12
11
9
than
The
APPLICATION
30.
without
so
you
OF
Spiro
should
40
of 65%,.70%,
can
Hunton,
Arbuckle
emboldened
be
average
much
Smackover,
try
and
by
RESULTS
-
to
os
50-70
careful
average porosity,
Brown
depth
even
Ellenburger
being prepared
percent.
wade
of
75%
100
how we

average
either
petrophysics
from
From
the
Dolomite
Sw;

Ss
6.
If
Pay
Pw
rect
15%
Woy
Why?
Total
For
Thus,
the
THE
where
These
=
=
=
_
viously
other is
average
without
=
way
achieved
the
10%
to
the
80
50
30
S$, and
30
in
sums
Feet
also
300
hydrocarbon
xh
a
hydrocarbon
a
(2.95/13.00).
Lob
itself.
10%
(10.05/13.00)
at 20%
two
PHYSICS
X
Because
example,
+
S,
Xbb
80
zone
16.25%.
and
2OS,b
X
averaging—these
OF
15
50-ft

47
average
is
average
and.
puters working with
30
10
pore’
80
20
+
zones
1000
knowing
is
a well
porosity
30
30 ft
ft
must
his the formation
porosity.
figures
zone
50
%
ft
Porosity
-
+
the
+
the
has
feet
Is
be
Averaging water saturation
at
for
feet,
X
a digital
is
therefore,
50
the
number of ways
two
long
skewed
porosities,
ROCK/FLUID
averages.are
so
25%
20%
are.
ft
25
is
the
combined
in
even
thickness.
15
25
and
the
average
most
In
Saturation
S,,we
zones.
calculated:
log base.
total
what
have
favor
SYSTEMS
the
more
%
X -50 ft
defined
the
porosity—that
therefore,
depending
of

One
as:
is
water
is,
average
20%
13.00
is
cannot
on
case
the
to
X
at
should
oil
porosity
10.00
$,,_ Way
3.00
the
‘13.00
Ft
zone
use
is
conveniently
ofthe
dangerous.
10%
be
is
feet
longer
porosity
compute
satutation
For a
50
(1
done
average porosity 15%? Not
an
feet
saturation
intended
and
ft
-
used
zone.
is
mot given
porosity
30-ft
is
2.55
7,50
the
using
and
10.05
in
Sy)
The
by:
long,
and
average
X
above two zones:
cor-
zone at

total
the
ob-
necessarily.

the
use of the
S,,.
22.69%
com-
77.31%
10.05
Permeability averaging may be
Fl