Page 120 - Open-Hole Log Analysis and Formation Evaluation

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RHOMBIC PACK i Poe? SQUARE PACK ao Il, 106
is
IN HORIZONTAL IN HORIZONTAL CUBIC ABOVE SECOND METHODS
out
=
and
will
ship
their
(nd)°
,
20,000
12,000,
which
thus
Chicago
of
surface,
Quite
volume
and
porosity
~
geologic
Cubic
ft.
generally
FIGURE 6.1
occupied
decreases
is
is
is
the
nature
by
fits
(nd)?
decrease
area,
apart
not
rhombohedral
with
45%
sort
doe’
as
a
simplifies
resulting
packing
linear
compaction
Press from
most
seeks
occupied
opposed to 47.64%
and
to
from
is
in
FIRST
4/3n(nd/2
LAYER

/a(nd/)*
a
by
(1
where
with
with
the
not
-
packing,
more
Graton
ow
ever-smaller
7’
increasing
depth
an
is
‘
is
determining
a
x /6)
depth
depth.
ALONG
in
which
porosity
DROPPED
depth
grains.
or
SECOND
of
spheres
of
in
For
compact
mechanics
sorting gets poorer,
LINES
and Fraser
factor.
INTO
efficient
feet,
is
for cubic packing).
OF
LAYER
normally pressured
of
a
ORTHORHOMBIC
burial
0.4764.
way
since
12.9%
1935.
produces
compaction
is
VALLEY
OF ANALYSIS AND APPLICATION
how
to
a
packing
at
CENTER
example,
Note
typical
OF
if
a predictable
sand
store
that
another
#0,
constant
15,000
value
porosity
the
(4/3)m(nd/2)*.
ft
reservoirs—that
DROPPED
RESULTS
for
the
of
grains
of
manner.
a
‘a
is,
spheres
term
matter.
The
and
are
intergranular pores
in
the
a
25.95%
might
8.5%
log
porosity
mechanisms—such
be
particular
at
at
A relation-

packed,
of
Porosity
may be
Fora given grain size, porosity
box;
Packing of Spheres, Reprinted by permission of the University of
(as
as
porosity
dcancels

; , 6.2 shows a ‘ApA. p= and ‘fluid &, in If flow is BL q= RAAp _ porous aL allow dynamic RHOMBOHEDRAL While TO VALLEY SECOND LAYER Permeability 6. 107

’
k
a
on
is
is
For
the
=
beds
tion.
In

along
years,
FLUID
highly
thé
the
The
taking
If only
Initially,
relating
THE
given
through
deposited
fluid
rock type.
Also,
some
directional
their
into
We
(Exceptions
of a-‘darcy:)
in
fracture
relationship:
permeability.
in-atm/cm,
the reservoir rock
sediments
continental
(continental),
OF
has
in
are
a water-free
thus
been
laid
shelves
deltas

however,
measurements
ROCK/FLUID
6)*,
and
to this rule are eolian
down
it
buried,
rock.
is
in
a
(marine),

environment.)
as
qis
permeability
rock
water,
along shore
Later
in
in
hydrocarbons
, IN THE RESERVOIR DISTRIBUTION ne eee ey BH, : of the fracture azimuth on the depending directional is likely permeability reservoirs, In fractured from may be different permeability vertical in that the increasing axis, long to align may tend effects Depositional properties. it is, is a vector—that permeability reservoirs, width. fracture square of the to the pe
either
lines
cc/s,
in
illustrated
from
permeability
in
porosity
geologic
in

river
the
ability of
time,
and
figure
and
to
takes
(transitional),
rock
after
neighboring
6.3.
dune sediments, which are initially
planes.
or
lake
be
grains
horizontal
direc.
developed
on
Kozeny
relationships
dis-
A p/L
| the over | Figure | found only on depends one-thousandth unit cm’, of defines Ap, a through a is a .
|
to
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