Page 166 - Open-Hole Log Analysis and Formation Evaluation

_
So
Net
Net
and
The
hole
beds
these
far,
WELLS
etc.).
sidered.
pay
pay
multiple
are
SPECIAL
thickness
gross
sections
is
Offshore
includes
other
reserve
formation
only
AND
effects.
reflects
of a
all
pay
figures
CASES
summing
is
hydrocarbons).
above
figure
section
referred
dipping,
However,
deviated
down
are
to
vertical
in
FOR
or
neither
pay,
to
the
DIPPING
8.3:
the
represented
exploration
formation
/ and c. or and The net porous gross The to Referring Net pay section pay section Gross permeable Net porous and Gross section such as: useful items it When DEPTH AND NET is reader exist at surface as tens or hundreds many In gas in question. and the temperature volume .Gas formation -analysis. may and .gas samples are
the
its
calculations.
wells
the
low-porosity,
- to use ones zone transition by A-B less oil/water hydrocarbon-bearing by A-C low-permeability section permeable the section is PAY MEASUREMENTS Bateman (1984), formation of times as B, will supercompressibility factors need to be to always Ry,
as
wells
both,
general,
and
represents
BEDS.
it
true
represented
from
and
is
~
with
DEVIATED
normal
case where
the
measured
fixed
a
for
hand
a
4
from
important
development
stratigraphic
horizontal
a
in
likely
to
small
to
log
the
/ less any contact, sections from aand b less sections is the gross A-D. distance to practice __ , further conditions. ‘For gas will much be factor Z for depend on formation collected and in a wildcat formation OF RESULTS APPLICATION
platforms.
the wellbore
beds
and b (ice.,

requires
make
is
As
‘it
made
thickness
HCPV,
compute
fraction
a
the
have
the
:
in
produce
(i.e.,
a
only
shale
: as such section less number a : details, be recovered of the pressure submitted situation, temperature,
not
top
deviated
its
been
result,
gross

or
allowances

of

drilling
1—that
: a, shale of the at is, particular and for PVT and oil 7.
the
con-
true
the
deviated
for
includes
oil-in-place,
of
water-free
b,
the
pay
sections,
The

ee
a a oe en ee

GROSS SECTION 153
POROUS & PERMEABLE
GROSS PAY
NET PAY . 8. RESERVE ESTIMATION
,
FIGURE
8.3
Gross and Net Pay.
HYDROCARBON

Resistivity

Formation Top
Formation Base
Oil/Water Contact
Top Transition Zone