Page 190 - Open-Hole Log Analysis and Formation Evaluation

~
NaCl grains/gal at 75°F—> eos oor oor 4 003-4 ogi
| ppm—— O99 002 20,, 4, “oe, 00, 04 205
CONCENTRATION
domo
dog
DN
BE
2
£
x
n
wy
FOR Nacl ~
SOLUTIONS
176

e
°
AYNLVESdW3L

RESISTIVITY OF SOLUTION (OHM-METERS) ~_ wdd +> doGL 05 /ujosB
9.
w+—do
FIG . sgt
§ ~~
URE 9.11 Solution Resistivity vs. Temperature and Concentration. Courtesy Schlumberger Well
Services.
o \ i>

more
ratio
to
SP
x =
is
ionic
found
0.08
or
#9.4
#9.5
X
Ryps75
from
figure
Note
the

82/187
more
SP.
(0.6414
the
Rie
Of Ryz
R,,, than
7/180
Ratio from
is
mo R,. is found by dividing the known value of Step 5: Computing calculator 9.13 to find value of Rmjo/ Rwe The -100 mV and temperature is QUESTION nn where K = = (T°F + 505)/8. Alternatively, Ruel Rwe = 1O-sP/K, ratio, provided a calculator The SP equation may be: used direct ly to compute Step 4: Rmje/Rwe SP Raye: Ry at formation temper ature 0.036
+
formation
is
Ringe
the
9.12
is available:

it
Om.

filtrates
R,).
Hilchie
figure
approximation

to
Ry,
to
constructed
not
normal
9.13
figure
be
by
180°F.
to
=
the
for
equation
the
and calcium
9.12
the
Use
Of RingtO
9:89.
may be
to
treat
data
contain
states

of
Ryze:
converted
average
the
cations
Rmy
find
|
Rmpe/ Rue
oy
either a
used.
.
the.
:
Ry, sol Rive