Page 172 - Open-Hole Log Analysis and Formation Evaluation

4030

OIL-WATER

pay
the
The
and
It
side
bed.
maps
CONTACT
is
gas/oil
FIGURE
It
seismic
isopachs.
and
structure
possible
structure,
is
sufficient
point
above
change:as
gross
or

RESERVOIR
TVT will
that
the
exit
the
the
also
showing
8.7 Net
wells,
Figure
rock
cannot
assumed
the
together
well
well
from
mapping,
Pay
be
how
8.7
appear
that
have
Courtesy Schlumberger
gas/water)
well
as
the
VOLUMES
with
oil/water
assumed
volume
the
enters
many
many
been
an
crosses
top
shows
will,
that
deduced
a
true
the
Thickness
the
net
in
AOS
contact
contact.
negative
the
side.
Well Services.
bed
drilled,
feet
If
fact,
isopach
enclosed
bed.
cross
froma
it
as
well
of
exist.
Isopach
this
is
it
map
If the
uncertainties
enter
is
numbers.
single
pay
within
stratigraphic
section
and
Such
the
a
bed
log.
occurs,
usually
deviation
is
when
above
bed
remain.
the
maps
and
the
contouring
through
Even
the
thickness
Structure
highly
an
is
from
are
the
possible
well
with
to
Cross
the
the
answers
net
azimuth
the
However,
for
oil/water
leaves
dipping,
do
known
feet
aid
same
it

(or
after
oil-bearing
prepare
as
of
hydrocarbon-bearing
Section.
is
bottom
at
TST
the
not
of

Ao 4040 so Ve Vay 4020 Lyte be NENAV TY Ry Mee A 20 ON) 4010 - . ZONE = = SVT Pe 4000 ~~ 3990 3980 DEPTHS SUB SEA 159 OF RESULTS OF ANALYSIS AND APPLICATION I. METHODS

i Vip the and = Vp given The of A: db shown the may be Once Depth 8.
Vg
Ver
and
The
=
=
=
the
i ah A RESERVE ESTIMATION
by
area
in
t
n
7
&
3.

volume

Well Services.
total
total
such
Fb
found
either
Vy.
volume
a
Gat
figure
of a
[A, +
by
T
contained
map
8.8.
using
volume
volume
of the
is
a
Ang.
Ane),
+
T
of a
of a
trapezoid
within
V
‘
planimeter
drawn,
frustum
An
t2AF2AT
series
or
T
each
The volume
the
planimeter.
of a
section
pyramid
by
is
is
area
Ant1)]
FIA
A plot
then
contour
then
pyramid
between
as
of trapezoids
numerical
a
“e
T
two
given
is,
+A)
by
calculated
+
between
may then be
as
ty
enclosed within
function
two
an
contours
integration.
therefore
of
dy,
made
is
each
-

: Area ™ T
>
given
depth
contours
by
showing
is
contour
as
integration