Page 212 - Open-Hole Log Analysis and Formation Evaluation

ing
use
The
these
Since
FROM
studies
gamma
it
the
hole
minerals
of the
is
size
minimum
figure
alternative
ray
teads
weight
have
mud. A
that
ray
GR
simplest
size
ESTIMATING
and
67
if
=
OPEN-HOLE
methods,
10.7
relative
GAMMA
a
and
it
log
index
thickness
and
API
16
common
the
shown
series
=
will
RAY
to
the
are
corrects
constitute
3%-in.-OD
weight
gamma
gamma
be
that
10.7
relationships
procedure
maximum
Ib/gal.
GR
for
find
between
GRepax
estimate
SHALE LOGS
hole
is
ray
gamma
this
tool
= ~
have
to
is
subject
shales,
is
log
weight.
values
applies
ray
it
GRyj,
GR,,,
casing
CONTENT
centered
to
is
not
GRovin
is
GResin
been
a
and

and
from
radioactive
run
deflection
index
logs
rescale 0
Figure
LOGGING MEASUREMENTS
available
is
eccentered
as
in
of
to
a
the
GRoax
run
number
the
in
necessarily
proposed.
as
materials
the 100%

Such
of
defined
the
gamma
To
open
as
making
applies
well.
that:
following
a
shale.
best
combination
to
the
ray A
commonly accepted
shale-volume
further
. time. most log, induction or an If it is run with a laterolog is run eccentered. FDC tool, it with a CNL- ray that Note GReor =? centered. Tool is Mud = 8 in. Hole size units. GRog conditions: under to Use #10.1 QUESTION cement it cased hole; run 10.8 mud for hole; to Figure corrections. appropriate for of charts 10-Ib hole in an 8-i
it
perturbing
linear
logs
filled
method,
associated with
between
number
practice
explain
indicator.
rescal-
its
and
clay
to
of
in
with
corrects
‘ |
;
d
|
i

:

199
—

: 5 8 g oc @ o a i g

0.6
0.7}
--~-
n+
: FIGURE GRor is defined _ *8o poe oa 1.0 : 1.5) i 20 25h. 3.0b— -- 8.5] 4.0|-- 5.0 0.66 [~~~ 0.6 0.7} 0.8]----- > 0.9 ba nen 10 : 10.
THE

4
5
!
Whe
Te
--st
°
10.7
as
:

the
‘1 os | J GAMMA RAY.LOG
eee
4
Gamma
ee
Spence
Courtesy Schlumberger
Ray
wien
i Tool Centered osimenantnfecaden Tool ——— nemfe
— 6 fo be
d,,
Tool
. response of a 3-in.
Hole
|
am
ce ce Eccentered dene Centered _ String Tools. English
, be ofeenee on. __ t
Well Services.
8
tool
Corrections

for
Diameter
:
: Lo pee
10
eccentered
Se
(in.)
7
Hole
. in an
. ene _
Size
f
. 12 : ahve.
ears
8-in.

and
.
- _
:
4
Mud
hole with
10-Ib
.

76

Weight.
16

mud.
‘ 1
y
: : mo
i
4 i
;

i