Page 153 - Open-Hole Log Analysis and Formation Evaluation

FIGURE
7.4
A
CINGHE
SD

(FEET)
a
Neutron-Density Porosity Log.

: DEPTH 139 OF RESULTS APPLICATION Il. METHODS OF ANALYSIS AND 138

Oe
_ On Rock Matrix Porosity Clean Sand 7.
is
(1
Sy
the
and
: BASIC CONCEPTS
This
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.
5320
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Water
FIGURE
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From
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the
QUESTION
by

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can
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5350
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Porosity
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porosity curve
#7.2
,
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light
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example
saturation
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can
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the
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can
Both
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example
Definitions
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compute
read
the product
SATURATION:
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a
was
zone,
put
where
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these
fig.
shown
defined
left)
to
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the
as
. and hydrocarbons of around to show sand section, for the (fig. 7.4), log trace) (the solid to (right figure log Volume of Rock of Pore Space Volume “7 - e PS — OF LOG ANALYSIS
a value
in
water
7.6
then,
bulk volume
the
).
defined,
for
the
over
good

read
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if the
apparent
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Note
for
use
in
21%
. Effective
the
7.4,
Tracks
saturation
volume
the
that
The
2
on
the
relationship
know
good
. present porosities porosity, shale porosity average and 3. the Rock Matrix Clay Filled Porosity Porosity Shaly Sand
hydrocarbon
the
the
wet
porosities
of hydrocarbon
that
;
is
in
of Total and Effective Porosity.
fraction
between
zone
reflect
and
each
using Archie’s
Using
section
example
saturation
of the
porosity
.
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rock
and a
at
porosity scale
the
is
bulk volume
the
in
the
zone
is
purposes.
logs.

the
pore
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the
gas
are
If,
value
given
effects
top
equation.
the
space
oy
for
on
resistivity
by
of water
cap
development
can.be
density/
marked
zone
of
of
o
: