Page 195 - Open-Hole Log Analysis and Formation Evaluation

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:
3.
4.
a.
5.
1.
b.
In
SP
as
the
the
the
the
a
Use
The
This
In
Step
2. Shaly
SP.
except
kinetic
(1977)
handle
hard
6:
mud
readings
Estimate
Readings
same
it
is
shape
in
FACTORS
“road
calculator
figure
measured.
eueTton
formation,
effect
currents
SP.)
resistivities
Unbalanced
the
is
or
Hydrocarbon
water-bearing
interpretation
need
the
can
#97
water
#9.6
9.12
of the
largely confined
conversion
map.”
formations
column,
affect
Ae aon?
to
There
mud
Inoil- based muds:
SP
formations:
to
flowing
figure
of
sands
For
no
connate
the
cause
will
careful
reproduced
Converting
the
are,
R,,,
AFFECTING
process,
SP
saturation
quantitatively.
noticeable
from
9.13.
of spontaneous
salinity is
convert
those
Owing
to
here
in
reduce
water
should
will
the
Rye te
THE
to
will
columns,
as
shale
this
toa
R,
(This
be
be
SP
handling.
Rupe! Ruve
Ry,
curve. This is
borehole
order to place in perspective
is
to
flow
however,
permeable zones
the
distribution
bed
available
potential
with
a
=
inclined
salinity
figure
an
Resistivities may
permits the formation shaliness to be
reduce
depleted
Sh,
for
be
chart
SP.
selected
actual resistivity of formation water from
of the
complete
from
some
3.84,
9.15.
between
and in
toward
simple
SP
for
generated in
illustrated in
R,, value:
Sh,
from
“streaming” potentials
phenomenon
toward
are usually
the
the SP,
meast{
figure
differential
is
measured_SP:
reservoirs.
determined
that
and

a legitimate
matter
lack of an
R,.
figure
1
currents
9.11.
P,
This
of
shales.
oil-based
There
Bateman
called
r
tirethents:
circumstances
permeable
and,
is
9.16,
accurately
pressure
ifa clean
mechanization
figure 9.14
using
the
augment
is
eee
and
no
muds.
because
bed
and
the steps used for calculation
These
R,, determination
Thus,
into
comparison.
where
the
where
P,
reversing 8
of the
way
either
sand with
the
SP:
to
high
of the
from
therefore,
the
very. high i in hard formations,
are
electro-
of the
SP
easily

log
phenomenon
only
Konen
electrical path: in
offered

Find
to
Convert
Rue to
Roy at
Rinfe
Temperature
Read SP

Ry
Rm

SP

FIGURE

R mfe

9.14

Tees
Them

Quick-Look

Guide

a
to

Rmf 180°F : ‘of ‘formation tem temperature found. to : be 0.0083 _al _at_a Rye has been Formation Figure 9.12 is used. convert Rng tO Ry in step 3. process used to Pp we w the 7 Temperature Formation ‘Estimate he * a find and “TE Ringe = 0.031 Ruf Log Headin
7
Rue
R,, from

the

Jf

na

SP.

Rw