Page 150 - Open-Hole Log Analysis and Formation Evaluation

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_ #7.1 QUESTION is sample) density of the Provided the then with water, saturated simplest is to One of the porosity In a laboratory, divided interconnected pores and effective of rock (¢7) as total porosity silt, etc.), are particles, Pores effective porosity. Intergranular interconnected. of very porous, but is pores are interconnected definition
A
as
sity
and
a
figure
The
weigh
to
weighs
the
sample?
an
figure
7.4
logs
(neutron)
sample
do
shale
is
in
7.3
215.5
of
185.5
this
density
may
porosity
g.
g.
density
such
exercise
be
curve.
measurement
If
known,
a
shows
7.4
of
to
sections.
heutron-density-GR
After
the
porous
.
a
to
trace.
the
the
the
This
logging
that,
7.3
all
log
colot
ignored.
dual
if
The
show
tool
recording:
volume
For
solid
properly
clean
the
provides
is
curve
time
froth
blocked
in
a
an‘in
be
in
the
rescaled,
removed
up
being,
suggested
(shale-free)
the
situ
can
the
the
some
Tracks
, of the the porosity 1 g/cc, what is water is is matrix of the sandstone density it from is the water is with water saturated sandstone can be calculated. porosity volume of the rock matrix (or the rock it. the water and reweigh remove all when it is 100% a sample of rock weigh of ways. in a number can be measured (see fig. 7.5), by the volume
figure
volume
2
image
be
sand-shale
the
7.4
the
volume
concentrated
gamma
dashed
and
bulk-rock
the
2.65
of the
first
3
leftward to
found
sample
den-
curve
displayed

log
g/cc
to
a
pore
the
step
in.

7.
FIGURE
7.3
(INCHES)
A
BASIC CONCEPTS
OF
DEPTH
Dual Laterolog Resistivity Log.