Page 184 - Open-Hole Log Analysis and Formation Evaluation

FIGURE
9.7

0004 Tye where Tis the formation temperature in °F. K= perature development of the potential. K can be estimated from the tem- (no shale is present) and is sufficiently thick to allow for full ‘The SP can be read in a water- -bearing sand provided it is clean known. oh temperature. By inspection, R,, can be found if SP, K, a

Normal and Reverse SP Deflections.
pw
6
Gh
he§

a
vo
'
-

of
R,,,
Rone
care
and
mud
have
In
=
‘mud
eg) =
order
Ry
press.
a
F
= where
where
serves
Ry,
values
values
in
drilled,
defined
order
to
the
R,,¢
properly
-K
collected
of
for
R,,
engineers
can
been
W
to
the
substantial
necessarily
filtrate
should
differences.
value
the
These
by
proximation
log
is
R,,
tend
be
of the
usually
love
and
be
SP
leads
Experiments
(R19
for
hole
for
rig
to
absence
maintain
to
measured
to
the
factor.
and
known
reported
at
paths
x
oy Boy
parameter
Figure
collected,
correct.
R,,,;
pdrform
and
0.75
R,,
to
estimation
data.are
the
taken
on
of the
prepared
on
in
R,,,
the
of
9.8
the
(Rny/Ry)
the
mud
a
R,,,
estimated
19!
can
as
by
support
SP
were
19"
take
the
formation.
sort
=
-
sprinkle
personnel
be
A
when
of R,,,.
logic
usually
the
Likewise,
shows
log
from
in
daily
A
samples
8)
predominantly
which
quantitative
weight
placing
fit
appearance
good
10.4)/7-6)
the
sundry
reported
using
a
in
are
shortcuts
such
reported
resistivities
based
measured
basis
direct
entered
may
a
ang
on
log analysis.
heading
of any reported value
timea particular
not
circulated
on
of this
and
on
on
these
be
analysis
contgntion
A
a
log
correct
of the
plot.
for
for
a
of being
show
l!b/gal.
additives
the
mud
circulated
NaCl muds is
As
that

quote
always
R,,,,
fair
this
of the
by Williams
mud
daily
values.
into
log
various
approximation
busy.)
formation
some
can
R,,,
empirical
mud
SP,
manner.
R,,;
measurement
and
estimated’ from “figure
headings
and
is:
the
is
well
samples
Another
as
be
basis
was
of
comparison
the
laws
filtrate
on
chart
9.9,
as
a
the
estimate

Even
are
a
Logging
given
with
heading.
of
were
a
sample
a
if
seen,
and
some
system
Dunlap
but
in
not
the
representative
gives
alarmingly
drilled.
least
a
low
which
the
is
well
between
statistical
series
they
both
sample
value
daily
by
relationship
for-
physical
However,
engineers
mud
(Mud
not
actual
large
the
well-
are
ap-
always
of the
fraction
(1984),
in
was
of
also
for
R,,
a
of
-