Page 49 - Open-Hole Log Analysis and Formation Evaluation

METHODS

OF

GATHERING

FORMATION

fr.
cut
Sst:
por.,
ang,,

sli.
gd.,
EVALUATION DATA
Fluor.
lithic,
intgran.
arg.,
Stn.,

gd.
bu.-wh.,
mica,

on
log,
Gag
same
care
Total
Visual
Rate
shows
reach’
is
Cuttings
gas
liberates
between
The mud
Calcimetry
fluids
good
extracted
for
the
several
depth with
in
hydrocarbons.
inspection
Chromatographic
give
the best curve
collected
cuttings
therefore
from
each
logger’s
of penetration
at
the
corectly at the proper
and
correlation
records
concentration,
drillpipe
carbonate
the
to
analysis
indirect
other.
reaches
and
cuttings
of cuttings
mud
sources
that
required
with
and
from
depth
fluids
drop
a
shale
at
RELEVANT
by
in
of gas
to
analysis
When
the
can
the
give
the
into
of data
either
be
the
shaker
an
gas

gamma
the
normal
exponent,
place
carbide
the
is
the well,
direct
chromatographic
ray
blender
trap
and
pill
be
correlating
include:
or
formation
mud
or
mud
analyst
a
a

or
SP
broken
wellbore
to use is the rate of penetration
combined
and
Lag times
mud
difficult
and/or
in
and
Overpressured
indirect
ultraviolet
curve.
log
and bit cuttings actually reach the surface).
(ROP).
the
to
1 include: possible of measurement of Mud Logging Data Gathering and Presentation. The, types FIGURE 2.1 Schematic Nee LoL in from liberated Gas should appear on the mud log all measurements If properly lagged, exactly. calculated pill of the journey downward time for the known, the accurately are of the drillstring dimensions Since the “bottoms up” to the surfac
cuttings
light
the cuttings
casing
time
deep wells
can
the
indications
a wireline
This usually
annular volume
samples
Considerable
may
these
bit
of
interpretative
take.