Page 198 - Open-Hole Log Analysis and Formation Evaluation

7.
b.
a.
me
The
9.18
from
Find
FIGURE
Reo! Rm
SP
use
the
required
Compute
ay ue <—SSP—> LOGGING Ill. OPEN-HOLE “184
=
QUESTION
permission
9.17
shows
of
SP:
the
by what
50

#9.8
one
deflects
Cox
Factors
of
25

of the SEG.
(dj, Ryo/Rm,
percent
and
potassium
corrected
d; =
the
mV
the
and
SP

Affecting
4)
more
value
and 30 in,
Raymer
from
has
chloride
are
SP
for
the

MANDREL MEASUREMENTS
the
(1976)
been
Rm

tt
practical
muds
SP.
usually
base
Reduction,
cover
line
charts.
7
affects
reduced.
known
this
_ SP
in

After
the
a
or

Most of
subject
sand
the
in

4
Segesman
guessable.
ft
derivation
of
1962.
detail.
thick.
A

variables
Ry
by

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3°
u
a
o
70
60
50
40
30
20

70
50
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40
8-in.
30
ly
TOOL
the
The
tion
THE
quick
‘FIGURE
SP.
filtrate.
Services.
as
SP
observed
a
HOLE
9.18
AS
20
different
of thumb is
SP
This

A
formation. If
SP
presence

to
for
solution
NaCl
BED
fact
,CENTERED
|
IS
to
add

KC]
SHALE
mud
SP. sand_4S
the
30%
deflection,
feet
of shale in
can be
to
the
KCl
filtrates
case.
an
the
used.
1098
Correction for Bed
than
THICKNESS
value
mud
The
subtract
in
INDICATOR
7
for
25
R,,,
6
otherwise
mV,
to
measured
NaCl
5
Thickness.
observed
clean
and
R,,,;
estimating
Rf.
in
perturbation
4
a
and
is
the
filtrates.
then
Courtesy
3
sand will
clean,
treat
shale
Again,
simply
proceed
a
the
relationship
tend
to
as
to
is
for
,
content
5
quick
Schlumberger
take
35
3.0
25
4.0
5.0
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oa
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5
2
of
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28
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w

Well
computa-
the
a
reduce
slight-
rule
NaCl
water-bearing