Page 25 - Open-Hole Log Analysis and Formation Evaluation

to
log
and
that
mud
core
Phase
more
TABLE
some
phase
extent
The
Drilling
Analysis
Primary
Logging
testing.
seismic
Secondary
Feedback
1.3
recovery
-
refine
merit
Exploration
Exploitation
magnetics
will
evaluation
shows,
Abandonment
wireline
analysis.
logging,
be
will
profile.
Should
seismic
testing
prescribed
exhaustive
that results
The
Log
not
exploration
Core
Formation
Drill
Water
The
and
together
coring,
Define
be
such
Activity
or
covered
model
Log well
testing
logging
—_ Economic
well
a
Producing
formation
analysis
depth,
of core
Refinement
whole
analysis
by
gas
and
analysis
analysis
and
phase
with
tests
drilling
hydrocarbons
is
structure
and
logs
tests.
log
production
Evaluation
interpretation
decisions
covered in
Thus,
structure
process
initial
analysis
injection
will
prove
of seismic
sections
a
phase
Core
either by wireline
made
will
involving
this
be
can
log
may
the
have
of
Overview
be
Log
be
Mud
measurements
run.
all
will be
dealing
from
book.
Material
flood
while
Sidewall
analysis
Seismic,
profile
results,
testing,
An
seismic
formation
— Production
Formation
log
Open-hole
a direct
employ
prospective
analysis,
while
with
logging,
will
covered,
formation
log
calibration
cores,
logs
drilling
gravity,
balance
(VSP),
covered
as
seismic
initial
be
to
may
available
via
effect
Laboratory studies
testing
drillstem
However,
both
analysis
summarized
by
coring,
records,
on
be
Evaluation
or
drilling.
vertical
will
analysis,
by
the
data
(MWD)
analysis
wireline
results
testing
efficiency analysis,
magnetics
the
analysis
logging
The
will
use
covered
calibration
indicate
table
microrock property analysis
drillstem
gravity,
seismic
Methods
core analysis
to
first
discussion
1.3.
formation

measurements
log analysis.
the
testing
of logs

vertical
tests
zones
and/or
including
and
of
productive,
be
by drillstem
of mud

is.
A
so
of a
turn
wells
This
topics
logs
wells,
inputs
from
bined
drilled
played
tional
usually
(IHRDC
sections
bottom
process.
to
are
Many
samples
rock:type
the
methods
conserve
CORING
field
on
pressure)
are
analyzed.
gives
presence)
number
of
a
of
is
Mud logging,
saturations
under
any
are
Press
recovered
and
side
where
analysis
correctly
the
drilled
and
of
the
log
cores are
MUD.LOGGING
brief summaries
More
however,
semicontinuous
either
its
of
before
as
presupposes
the
can
been cased. These
and
the
each
are
all
well,
will
of the
the
essential
formation
is
basis
they
that
fluid
immediate
economic
discussion
continuously
to
only
development,
the
curves
rock
well.
of methods.are
serve
logged
an
nearly
be
parameters
where
may undergo
or
ability to
methods
may
cores
in
as
it
discussed
by
become
of actual
logged in this manner.
coring
content.
evaluation
is
use
orientation,
sample
have
forge
always
a process whereby the circulating
indications
discussed in
required after the well
to
needed
predict
The
physical
cut,
plays
the
notations
‘Other coring methods are available
of
to
cut
wireline
For
to
been
measurements
determined
as
an
The great merits of mud logging
formation
scope
detail.
a
understanding
introduction.
its
the
cut.
drilling
ahead in
gathered.
See
rock
sundry
is retrieved and brought back to surface. The
require wireline
cores
changes
from
those
unmanageable.
monitored
monitored by a variety
pressure,
in
the
An
logging
of this
interpret
on
own,
‘provides
type
cuttings
essential
Thus,
of core
Those
by
or
function
its

Development wells,
surface,
sample
include the
in
text
cut using a special core bit whereby a
mud and cuttings
sophisticated coring mechanisms are
tools
the
and
the
problems
and
accurate
the
part.
togis that
to
the
of sensors.
analysis
of the
analysis
familiar
the
but
where
awareness
measurements
only.
a wellbore.
open-hole
journey
cote
(such
of depth.
now in
indications
it
ina well
unfamiliar with
The
initial
of
the
as
are
original
has beemdrilled and before
with
of
for cases where additional
for example,
use
from
reader
Not
it
(which
can
results.
more elegantly referred to as hydrocarbon mud logging,
is
same.author,
vital
com-
dis-
being
the:
mud-logging
are
Wildcat
hydrocarbon
over-
availability ona
in
the!
| the following methods mentioned, has reached all'of the samples taken. Once the well. or may be cut or sidewall some here. cores methods (MWD); and, in that wellbore, evaluation measurements while drilling ' come from the formation analysis still must mud such drilled through book, the A wellbore analysis
relevant |
all
:
Conven-
the
be
that
formation
stages
analysis.
long core barrel
has
cut core plugs
wireline
fluid
|.
rock
these