Page 218 - Open-Hole Log Analysis and Formation Evaluation

see AE

204

COUNTS/CHANNEL
o o 108 °
o o
HH Ht fp tsa te
PH _ II.
HHP
~
of
the
the
also
total
32.00
10.16
gives
made
the
could
FIGURE
coded
(1976).
task
ranging
to
reduced
contents
be
minerals
variation
potassium
of
determine
gives
useful
10.11
in
three
three
area
gamma
Still
64.00
are
litho-density
from
and
an
assist
black
: OPEN-HOLE LOGGING MEASUREMENTS
called
of the
ray
in
figure
&
photoelectric
the
tool,
mineral
ratios,
the
thorium/potassium.
=
968.00
lithology
another
shales,
mapped
indicators.
curve
example
10.14.
thorium
plots
represents
as
A
components
and
mineral
CHANNEL
highest
a
Track
of
to
ADJUSTED
of
3
(U,
the
low
absorption
128,00
clay
one
Uranium
the
together
approach,
U
geochemical
potassium-feldspar
identification
SAHPLE
NUMBER
by
to
gives
thorium
function
by
sort
such
type,
If additional
with
a
Gamma Ray Spectrometry.
Th,.and
potassium
160,00
Th
:
a
itself
as
SPECTAUH
identification.

K)
method.
data
formations
uranium/potassium,
coefficient
described
ratio
may
content.
of their
shown
coded
tatio,
offering
are
in
by
in
(P,)
a
for
with
Figure
already
presentation.
described
curve
display
thorium
uranium-free
indicate
both
Hassan
figure
10.13
to bauxite, A number
by
a
available,
number
on
plots
et
Track
and
obtained
Other elemental
example,
for
the
1

curve.
al.
10.15
computed.
with
thorium/uranium,
which
from
: . 224.00 256.00 192,00 CALCULATED =
ratios
illustrates
can
Marett et
. SPECTRUM 205 10.
shows
Track
2
(1976),
the
highest
ratios
a
Figure
indicates
and
high organic
example,
of minerals
be
al.
the
the
are
of radioactive
potassium

CGR
(GAP ID

40.00
j0.0
, Services. FIGURE 10.12 Gamma Ray Spectra Log. Courtesy THE GAMMA RAY LOG

. Schlumberger Well