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Weatherford's log analysis manual
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Log Interpretation Charts™Compact Tool Series
1© 2007 Weatherford. All rights reserved.
Contents
Borehole Environment and Formation Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Estimation of Formation Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Estimation of R and R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mf mfe
Porosity and Formation Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Resistivity of Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Resistivity of NaCl Solutions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maximum Tool Length in Deviated Wells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Density and Pe Values of Saltwater Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Capture Cross Sections for Water and Hydrocarbons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
R Determination From Static SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12we
SP Bed Thickness Correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
R vs. R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15w we
Compact™ Spectral Gamma Ray Borehole Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Compact Spectral Gamma Ray KCI Mud Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Compact Gamma Ray Borehole Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Compact Array Induction Borehole Correction—Shallow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Compact Array Induction Borehole Correction—Medium. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Compact Array Induction Borehole Correction—Deep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Compact Array Induction Tornado Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Compact Focused Electric Borehole Correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Compact Deep Laterolog Borehole Correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Compact Shallow Laterolog Borehole Correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Compact Laterolog Tornado Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Compact Deep Laterolog Borehole Correlation—Shuttle Deployed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Compact Shallow Laterolog Borehole Correction—Shuttle Deployed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Compact Laterolog Tornado Chart—Shuttle Deployed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Compact MicroLaterolog Mudcake Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Compact Neutron Porosity Charts—Explanatory Note. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Compact Neutron Porosity Matrix Transforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Compact Neutron Porosity Environmental Corrections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Compact Neutron Porosity Matrix Cross Section Corrections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Compact Neutron Porosity Formation Salinity Corrections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Compact Neutron Porosity Cased-Hole Corrections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Compact Neutron Porosity Environmental Correction Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Lithology-Porosity from Density-Neutron Crossplot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Lithology-Porosity from Sonic-Neutron Crossplot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Porosity and Saturation from Density-Neutron Porosity Plot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Lithology-Porosity from Density-Pe Crossplot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Matrix Identification from the PhotoDensity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Log Responses in Common Rocks and Minerals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Compact Curve Mnemonics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
2 © 2007 Weatherford. All rights reserved.
Borehole Environment and Formation Parameters
Chart Gen-1
3© 2007 Weatherford. All rights reserved.
Estimation of Formation Temperature
Chart Gen-2
English
°Follow the 1.2 F/100 ft geothermal gradient line to 10,000 ft, and draw a vertical line down to intersect at 180 F.°
°1.2 F/100 ft.
2,500
5,000
7,500
4 © 2007 Weatherford. All rights reserved.
Estimation of Formation Temperature
Chart Gen-2(m)
Metric
1,000
2,000
3,000
4,000
5,000
6,000
7,000
5© 2007 Weatherford. All rights reserved.
Estimation of R and Rmf mfe
Chart Gen-3
6 © 2007 Weatherford. All rights reserved.
Porosity and Formation Factor
Chart Gen-5
1 2 3 4 5 6 7 8 9 10 20 30 40 50
Porosity, ( pu )
1
10
100
Fo
rmatio
n F
acto
r, F
m=2.8
m=2.2
m=2.4
m=2.6
m=1.4
m=1.6
m=1.8
m=2.0
Formation factor, F, is defined as R /R , where R is the resistivity of a formation fully o w o
saturated with water of resistivity Rw. It is related to formation porosity via a number of
empirical relationships of the form
where m is the cementation exponent and a is sometimes called the Archie constant. nF is used to compute water saturation in the Archie equation: S = FR / R. w w t
The chart allows F to be generated from porosity for values of m between 1.4 and 2.8
assuming a to be 1.0. For soft formations, the Humble formula is sometimes used, in which a is 0.62 and m is 2.15.
F = a
m
10,000
1,000
7© 2007 Weatherford. All rights reserved.
Resistivity of Solutions
Chart Gen-6
Chart Gen-7 is used to estimate the resistivity of NaCl equivalent solutions when the solids concentration is known, and also to convert resistivity from one temperature to another.
It is based on the Hilchie equation:
R(T) = R(1) [T(1) + x] / (T+x)
-(0.340396 log R(1) - 0.641427)where x = 10 10
and R(T) is the water resistivity at temperature T in degrees F and R(1) is the initial water resistivity at initial temperature T(1) degrees F.
For solutions other than NaCl use the multipliers in Gen-6 to obtain equivalent concentrations. Then:
i=1 Total NaCl equivalent = K ( s olids con centration)ii=n
where n is the number of components. The multiplier for NaCl is 1.0
–0.5
0.0
0.5
1.0
1.5
2.0
10 100
Total Solids Concentration (ppm or mg/kg)
Mu
ltip
lier
(K
)
NH4
NO3Br
I
Ca
HCO3
SO4
Mg
CO3
K
NaCl
1,000 10,000 100,000
8 © 2007 Weatherford. All rights reserved.
Resistivity of NaCl Solutions
Chart Gen-7
10
1
5
0.5
0.1
0.05
0.01
10 20 30 40 50 60 70 100 12080 90 140 160 180 200o
Temperature ( C)
Resi
stiv
ity o
f S
olu
tio
n
( -
m)
0.02
0.03
0.04
0.2
0.3
0.4
2
3
4
50 100 200 300 400150
oTemperature ( F )
200,000
100,000
50,000
20,000
5,000
10,000
2,000
1,000
500
200
NaC
l C
on
cen
tratio
n (p
pm
)
9© 2007 Weatherford. All rights reserved.
Maximum Tool Length in Deviated Wells
Chart Gen-8
200
100
0
Rigid Tool Length (m)
Rigid Tool Length (ft)
Ben
d R
ad
ius
(m
)
2 3 4 5 6 7 8 9 10 11 12
10 20 30 40
9
10
11
12131415
20
30
4050
100200
An
gu
lar
Bu
ildu
p R
ate
(/3
0 m
o
r °/
10
0 f
t)°
3 in.(76 mm)
4 in.(102 mm)
5 in.(127 mm)
7 in.( )178 mm
8 in.(203 mm)
Well Diameter
200
100
0
Rigid Tool Length (m)
Rigid Tool Length (ft)
Ben
d R
ad
ius
(m
)
2 3 4 5 6 7 8 9 10 11 12
10 20 30 40
9
10
11
12131415
20
30
4050
100200
An
gu
lar
Bu
ildu
p R
ate
(/3
0 m
o
r /1
00
ft)
°°
5 in.(127 mm)
6 in.(152 mm)
7 in.(178 mm)
8 in.(203 mm)
9 in.(229 mm)
10 in.(254 mm)
Well Diameter
For a given tool diameter t, the maximum rigid tool length L that will traverse a well of diameter d and bend radius R is given by: 12 2 /2L = 2{(R+d) – (R+t) }
Angular build rate (° / 30 m) = 1,718/R R in meters)
1™ /Compact 2 - in. (4 57-mm) Tools
3/Conventional 3 - in. (4 95-mm) Tools
6 in.(152 mm)
10 © 2007 Weatherford. All rights reserved.
Density and Pe Values of Saltwater Solutions
Chart Gen-9
Salinity (1,000 ppm NaCl)
0 50 100 150 200 2501.00
1.05
1.10
1.15
1.20
o3
3B
ulk
Den
sity
at
20
C (
gm
/cm
or
Mg
/m)
0 50 100 150 200 250
Salinity (1,000 ppm NaCl)
Ph
oto
ele
ctr
ic C
ross
Sectio
n
(barn
s/e
lectr
on
)
0.25
0.50
0.75
1.00
1.25
1.5
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8 3V
olu
metr
ic C
ross
Sectio
n, U
(b
arn
s/cm
)f
oApplicability: NaCl solutions at 68 F (20 C).o
11© 2007 Weatherford. All rights reserved.
Capture Cross Sections for Water and Hydrocarbons
Chart Gen-10
20
40
60
80
100
120
w(c
u)
0 25 50 75 100 125 150 175 200 225 250
Water Salinity (NaCl kppm)
o68 F (
o20 C) and ambien t pressure
o302 F ( 10 kpsi (
o150 C) and 103 MPa)
g(c
u)
0 10 20 30 40 50 60Pressure (MPa)
0
4
8
12
16
Methane
0 2,000 4,000 6,000 8,000Pressure (psi)
o68 F (
o20 C)
o104 F ( o40 C)
o140 F ( o60 C)
o176 F ( o80 C)
o212 F ( o100 C)
o o302 F (150 C)
h(c
u)
2 10 100 1,0003 3Solution Gas/Oil Ratio (m /m )
3Solution Gas/Oil Ratio (ft /bbl)100 1,000 5,00020
16
17
18
19
20
21
22
23
R Determination From Static SPwe
Chart Sp-2
English
at
12 © 2007 Weatherford. All rights reserved.
R Determination From Static SPwe
Chart Sp-2(m)
Metric
13© 2007 Weatherford. All rights reserved.
14 © 2007 Weatherford. All rights reserved.
SP Bed Thickness Correction
Chart Sp-3b
15© 2007 Weatherford. All rights reserved.
R vs. R w we
Chart Sp-3
English
at
16 © 2007 Weatherford. All rights reserved.
R vs. R w we
Chart Sp-3(m)
Metric
™Compact Spectral Gamma Ray Borehole Correction
17© 2007 Weatherford. All rights reserved.
Chart Gam-1
GR
/GR
(co
rr)
(lo
g)
5.0
4.0
3.0
2.0
1.0
0.9
0.8
0.7
0.6
0.52 4 6 8 10 12 14 16 18
Borehole Diameter (in.)
1.01.21.41.61.82.0
1.2
1.4
1.6
1.8
2.0
1.0
Air holes
f 3( gm /cm )
f
100 150 200 250 300 350 400 450
Borehole Diameter (mm)
Use this chart to correct the gamma ray response from MSG series tools for the effects of borehole size and mud weight.
Standard conditions are for eccentered tools in 203-mm) diameter wells with KCl-free 3mud of density 1.2gm/cm . Corrections for non-standard conditions are approximated by:
8-in. (
where d = (caliper in inches – 3.74)
f 3= mud density in g/cm
GR /GR(corr) (log)d0.06978e= 0.7 for centered tools
GR /GR(corr) (log) f0.06753 de= + 0.7 for eccentered tools
f
Applicability: Compact spectral gamma (MSG) tools. KCl-free muds.
Centered
Eccentered
™Compact Spectral Gamma Ray KCI Mud Correction
18 © 2007 Weatherford. All rights reserved.
Applicability: Compact spectral gamma (MSG) tools, eccentered.
Chart Gam-2a
Use this chart to correct spectral gamma ray logs for the effects of KCl drilling muds.
KCl increases the measured total gamma ray and potassium concentration curves. The corrections are given by:
-0.207dGr = GR – 0.382K (1 – e )corr log
-0.25dand K% = K% – 0.027K(1 – e )corr log
where K is the KCl concentration in kppm, and d = (caliper in inches – 5.2)
0 20 40 60 80 100 120 140 160 180 200
0
–10
–20
–30
–40
–50
–60
KCl Concentration (kppm)
Tota
l G
am
ma R
ay C
orr
ectio
n (
AP
I u
nits)
0 20 40 60 80 100 120 140 160 180 200Kcl Concentration (kppm)
0
–1
–2
–3
–4
–5
Po
tass
ium
Co
rrectio
n (
%)
6 in. (150 mm)
8 in. (200 mm)
10 in. (250 mm)
6 in. (150 mm)
8 in. (200 mm)
10 in. (250 mm)
12 in. (300 mm)
12 in. (300 mm)
14 in. (350 mm)
14 in. (350 mm)
18 in. (460 mm)
18 in. (460 mm)
™Compact Gamma Ray Borehole Correction
19© 2007 Weatherford. All rights reserved.
Applicability: Compact series (MCG and MGS) tools. KCl-free muds.
Chart Gam-3
GR
/GR
(co
rr)
(lo
g)
5.0
4.0
3.0
2.0
1.0
0.9
0.8
0.7
0.6
0.52 4 6 8 10 12 14
Borehole Diameter (in.)
1.0
2.0f
100 150 200 250 300 350
Borehole Diameter (mm)
Use this chart to correct gamma ray logs from Compact series tools for the effects of borehole size and mud weight.
The standard condition is an eccentered tool in an 8-in. (203-mm) diameter well with KCl-free 3mud of density 1.2gm/cm . Corrections for non-standard conditions are approximated by:
where d = caliper in inches
f 3= mud density in g/cm
for centered tools
for eccentered tools
GR /GR(corr) (log) exp 0.35= 0.75 fd – 2.25
5.75( )
GR /GR(corr) (log) f= 1.75 – exp -0.24 d – 2.255.75( )
1.2
1.4
1.6
1.8
2.0
1.0
f 3(gm /cm )
Air holes
Centered
Eccentered
™Compact Array Induction Borehole Correction—Shallow
20 © 2007 Weatherford. All rights reserved.
Applicability: Compact series (MAI) tools.
Chart Ind-10
2 4 6 8 10 12–0.01
0.0
0.01
0.02
0.03
0.04
Bo
reh
ole
Geo
metr
ic F
acto
r
Borehole Diameter (in.)
Borehole Diameter (mm)
50 100 150 200 250 300
Standoff
0.0 in. (0 mm)
0.5 in. (13 mm)
1.0 in. (25 mm)
1.5 in. (38 mm)
2.0 in. (51 mm)
Field logs are corrected for bit size, nominal standoff, and borehole fluid salinity.
Corrections are applied to each sub-array. The chart shows the composite correction after construction of the shallow output curve.
If borehole conditions depart significantly from nominal, new borehole corrections may be computed and applied to the processed logs after first removing the field corrections.
Borehole corrected conductivities are given by:
where is the apparent conductivity, the borehole fluid conductivity, and the borehole geometric factor.
app mgb
corrapp mgb
gb=
1–
–
™Compact Array Induction Borehole Correction—Medium
21© 2007 Weatherford. All rights reserved.
Applicability: Compact series (MAI) tools.
Chart Ind-11
2 4 6 8 10 12–0.002
0.0
0.002
0.004
0.006
0.008
Bo
reh
ole
Geo
metr
ic F
acto
r
Borehole Diameter (in.)
Borehole Diameter (mm)
50 100 150 200 250 300
Standoff
0.0 in. (0 mm)
0.5 in. (13 mm)
1.0 in. (25 mm)
1.5 in. (38 mm)
2.0 in. (51 mm)
Field logs are corrected for bit size, nominal standoff, and borehole fluid salinity.
Corrections are applied to each sub-array. The chart shows the composite correction after construction of the medium output curve.
If borehole conditions depart significantly from nominal, new borehole corrections may be computed and applied to the processed logs after first removing the field corrections.
Borehole corrected conductivities are given by:
where is the apparent conductivity, the borehole fluid conductivity, and the borehole geometric factor.
app mgb
corrapp mgb
gb=
1–
–
™Compact Array Induction Borehole Correction—Deep
22 © 200\7 Weatherford. All rights reserved.
Applicability: Compact series (MAI) tools.
Chart Ind-12
2 4 6 8 10 12–0.001
0.0
0.001
0.002
0.003
0.004
Bo
reh
ole
Geo
metr
ic F
acto
r
Borehole Diameter (in.)
Borehole Diameter (mm)
50 100 150 200 250 300
Standoff 0.0 in. (0 mm)
0.5 in. (13 mm)
1.5 in. (38 mm)
2.0 in. (51 mm)
Field logs are corrected for bit size, nominal standoff, and borehole fluid salinity.
Corrections are applied to each sub-array. The chart shows the composite correction after construction of the deep output curve.
If borehole conditions depart significantly from nominal, new borehole corrections may be computed and applied to the processed logs after first removing the field corrections.
Borehole corrected conductivities are given by:
where is the apparent conductivity, the borehole fluid conductivity, and the borehole geometric factor.
app mgb
corrapp mgb
gb=
1–
–
™Compact Array Induction Tornado Chart
23© 2007 Weatherford. All rights reserved.
Thick beds. Use borehole corrected data.
Applicability: Compact series (MAI) tools.
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6
1
2
3
4
5
6
40
30
20
10
8
40 in.(1.0 m)
30 in.(0.76 m) 50 in.
(1.27 m) 60 in.(1.52 m)
70 in.(1.78 m)
80 in.(2.03 m)
100 in.(2.54 m)
120 in.(3.05 m)
25 in.(0.64 m)
20 in.(0.51 m)
15 in.(0.38 m)
Di
2
3
25
30
50
20
15
10
7
5
RxoRt
0.6
0.5
0.95 0.9 0.80.7
RtRILD
R / RILM ILD
R/R
SF
EIL
D
Chart Ind-5
R = 10 mxo
™Compact Array Induction Tornado Chart
24 © 2007 Weatherford. All rights reserved.
Thick beds. Use borehole corrected data.
Applicability: Compact series (MAI) tools.
Chart Ind-6
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6
1
2
3
4
5
6
40
30
20
10
8
40 in.(1.0 m)
30 in.(0.76 m)
50 in.(1.27 m) 60 in.
(1.52 m) 70 in.(1.78 m)
80 in.(2.03 m)
100 in.(2.54 m)
120 in.(3.05 m)
25 in.(0.64 m)
20 in.(0.51 m)
15 in.(0.38 m)
Di
2
3
30
50
20
15
10
7
5
RxoRt
0.6
0.5
0.950.9 0.8
0.7
RtRILD
R / RILM ILD
R/R
SF
EIL
D
R = 20 mxo
90 in.(2.29 m)
140 in.(3.56 m)
™Compact Array Induction Tornado Chart
25© 2007 Weatherford. All rights reserved.
Thick beds. Use borehole corrected data.
Applicability: Compact series (MAI) tools.
Chart Ind-7
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6
1
2
3
4
5
6
40
30
20
10
8
80 in.(2.03 m)
100 in.(2.54 m)
25 in.(0.64 m)
20 in.(0.51 m)
Di
2
3
30
50
20
15
10
7
5
RxoRt
0.60.5
0.4
0.950.9 0.8
0.7
RtRILD
R / RILM ILD
R/R
SF
EIL
D
R = 100 mxo
90 in.(2.29 m)
(3.05 m)120 in.
150 in.(3.81 m)
200 in.(5.08 m)
70 in.(1.78 m)
60 in.(1.52 m)
50 in.(1.27 m)
40 in.(1.0 m)30 in.
(0.76 m)
15 in.(0.38 m)
™Compact Array Induction Tornado Chart
26 © 2007 Weatherford. All rights reserved.
Thick beds. Use borehole corrected data.
Applicability: Compact series (MAI) tools.
Chart Ind-8
R < Rxo t
R / RILM ILD
R/R
SF
EIL
D
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 1.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.9
0.8
0.7
0.6
0.5
25 in.(0.64 m)
30 in.(0.76 m)
40 in.(1.0 m)
60 in.(1.52 m)
70 in.(1.78 m)
80 in.(2.03 m)
100 in.(2.54 m)
120 in.(3.05 m)90 in.
(2.29 m)200 in.
(5.08 m)
150 in.(3.81 m)
50 in.(1.27 m)
0.02
0.05
0.10
0.15
0.20
0.400.80
RxoRt
10.0
5.0
3.0
2.0
1.2
RtRILD
Di
™Compact Focused Electric Borehole Correction
27© 2007 Weatherford. All rights reserved.
Applicability: Compact series (MFE) tools.
Chart SFE-2
2 3Corrections are approximated by: R / R = a + a x + a x + a x +.....FEFR FEFR 0 1 2 3(Corr)
where x = ln(R /R ). Coefficients for 4-, 6-, 8-, 10- and 12-in. wells are (left to right):FEFR m
1.0000000 0.3515411–0.1259589 0.0209587–0.0018341 0.0000652
1.0000000 0.5245657–0.2158732 0.0404045–0.0037254 0.0001324
1.0000000 0.6591658–0.2848466 0.0570030–0.0056788 0.0002223
1.0000000 0.7950933–0.4006034 0.1119412–0.0172275 0.0010960
1.0000000 0.9368961
0.4659671 0.1453734–0.0286625 0.0026412
–
a0a1a2a3a4a5
Cen
tere
d
10.1 10 100 10,0001,000
R / RFEFR m
R /
RF
EF
RF
EF
R(C
orr
)
Centered
1.6
1.4
1.2
1.0
0.8
0.6
1.8
2.0
2.2
2.4
0.4
6 in.
8 in.
10 in.
4 in.150 mm200 mm
250 mm
300 mm
12 in.
100 mm
Borehole Diameter
The corrected shallow resistivity curve FEFE has been corrected for bit size and Rm. To apply
an alternative correction, enter the chart using the raw shallow resistivity curve FEFR.
™Compact Deep Laterolog Borehole Correction
28 © 2007 Weatherford. All rights reserved.
Standard condition is 5-in. (13-mm) standoff in an 8-in. (200-mm) well, Ra/Rm = 20
Applicability: Compact series (MDL) tools, wireline operating mode A (voltage reference at 94 ft/29 m).
Chart Lat-4
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLD m
R /
RLLD
LLD
(Co
rr)
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLD m
R /
RLLD
LLD
(Co
rr)
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLD m
R /
RLLD
LLD
(Co
rr)
64
810
16
150100
200250 300
Borehole Diameterin. mm
1214
350 400
Centered
1.5-in. (38-mm) Standoff
0.5-in. (13-mm) Standoff
6
64
8
8
10
10
16
16
150
150100
200
200
250
250
300
300
Borehole Diameter
Borehole Diameter
in.
in.
mm
mm
12
12
14
14
350
350
400
400
™Compact Shallow Laterolog Borehole Correction
29© 2006 Weatherford. All rights reserved.
Standard condition is 5-in. (13-mm) standoff in an 8-in. (200-mm) well, Ra/Rm = 20
Applicability: Compact series (MDL) tools, wireline operating mode A (voltage reference at 94 ft/29 m).
Chart Lat-5
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLS m
R /
RLLS
LLS
(Co
rr)
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLS m
R /
RLLS
LLS
(Co
rr)
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLS m
R /
RLLS
LLS
(Co
rr)
64
810
16
150
100
200250
300
Borehole Diameter
in. mm
1214 350
400
Centered
1.5-in. (38-mm) Standoff
0.5-in. (13-mm) Standoff
16
16
14
14
12
12
10
10
86 150
150
200
200
250
250
300
300
350
350
400
400
Borehole Diameter
Borehole Diameter
mm
mm
in.
in.
864
100
™Compact Laterolog Tornado Chart
30 © 2007 Weatherford. All rights reserved.
Thick beds, 8-in. (203-mm) hole, step invasion profile, Rxo/Rm = 50
Applicability: Compact series (MDL) tools, wireline operating mode A (voltage reference at 94 ft/29 m).
Chart Lat-6
Use borehole corrected data.
1.0 2 3 4 5 10 20 30 40 500.4 0.6 0.80.2
0.3
0.4
0.5
0.6
0.8
1.0
2
3
4
5
6
8
10
20
30
40
50
60
80
100
R / RLLD LLS
R /
RLLD
xo
100
0.4
0.2
30 40 50 6080
120RtRxo
D (in.)i
RtRLLD
100
70
50
30
20
10
15
7
5
3
2
1.5
1.21.3 1.4
1.6 1.8
20
™Compact Deep Laterolog Borehole Correlation—Shuttle Deployed
31© 2007 Weatherford. All rights reserved.
Applicability: Compact series (MDL) tools, shuttle deployed.
Chart Lat-10
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLD m
R /
RLLD
LLD
(Co
rr)
Centered
48
16
100200
300
Borehole Diameterin. mm
12 400
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLD m
R /
RLLD
LLD
(Co
rr)
1.5-in. (38-mm) Standoff
16300
Borehole Diameterin. mm
12 400
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLD m
R /
RLLD
LLD
(Co
rr)
0.5-in. (13-mm) Standoff
4 816
100 200 300
Borehole Diameterin. mm
12 400
6 8150 200
™Compact Shallow Laterolog Borehole Correction—Shuttle Deployed
32 © 2007 Weatherford. All rights reserved.
Applicability: Compact series (MDL) tools, shuttle deployed.
Chart Lat-11
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLS m
R /
RLLS
LLS
(Co
rr)
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLS m
R /
RLLS
LLS
(Co
rr)
1 10 100 10,0001,000
1.6
1.4
1.2
1.0
0.8
0.6
R / RLLS m
R /
RLLS
LLS
(Co
rr)
100
Borehole Diameter
in. mm
64
10
16
1214
150
200
250
300350400
Centered
1.5-in. (38-mm) Standoff
0.5-in. (13-mm) Standoff
Borehole Diameter
Borehole Diameter
150200250300
350
400
mm
mm
1614121086
in.
in.
16141210864 150
200250300
350
400
100
™Compact Laterolog Tornado Chart—Shuttle Deployed
33© 2007 Weatherford. All rights reserved.
Thick beds, 8-in. (203-mm) hole, step invasion profile, Rxo/Rm = 50
Use borehole corrected data.
Applicability: Compact series (MDL) tools, shuttle deployed.
Chart Lat-12
1.0 2 3 4 5 10 20 30 40 500.4 0.6 0.80.2
0.3
0.4
0.5
0.6
0.8
1.0
2
3
4
5
6
8
10
20
30
40
50
60
80
100
R / RLLD LLS
R /
RLLD
xo
100
0.4
0.2
3040 50
120
D (in.)i
RtRLLD
100
70
50
30
20
10
15
7
5
3
2
1.1
1.2 1.3 1.4 1.61.5
1.8
20
6080
RtRxo
™Compact MicroLaterolog Mudcake Correction
34 © 2007 Weatherford. All rights reserved.
Applicability: MMR series with 4-, 6-, and 8-in. (102-, 152-, and 203-mm) profile pads in matching hole sizes.
Chart Micro-3
R/R
MLL
(co
rr)
MLL
3.0
2.0
1.00.90.80.7
1 2 3 4 5 10 20 30 40 50 100
R / RMLL mc
0.8 in.20 mm( )
0.7 in.17.5 mm( )
1.0 in.25 mm( )
0.4 in.10 mm( )
0.3 in. 7.5 mm ( )
0.2 in. 5 mm ( )
0.5 in.12.5 mm( )
0.6 in.15 mm( )
0 in. 0 mm ( )
h = mc
™Compact Neutron Porosity Charts—Explanatory Note
35© 2007 Weatherford. All rights reserved.
Applicability: Compact series (MDN) tools.
Neutron porosity logs are calibrated in limestone units (curve mnemonic NPRL) and
may be displayed also in apparent sandstone units (mnemonic NPRS) or apparent
dolomite units (NPRD). Chart Npor-5 shows the magnitude of the transforms.
Use Charts Npor-6a to Npor-8 to determine the magnitude of open-hole environmental
corrections. Chart Npor-9a details the cased-hole corrections. Compact tool
are corrected automatically for any or all environmental perturbations. Refer to the
Neutron Constants table part of the log tail to determine whether a particular correction
has been applied (indicated by departure from standard conditions).
Standard Conditions
Limestone matrix: CaCO with 7.10 cu capture cross section3
Borehole size: 8.0 in. (203 mm)
Borehole fluid: Fresh water
Tool standoff: 0.0 in. (0 .0 mm)3Mud weight: 8.345 lb/US gal (1,000 k g/m )
o oBorehole temperature: 68 F (20 C)Formation pressure: 0 kpsi (0 MPa)
Formation fluid: Fresh water with 22.2 cu capture cross section
Standard sandstone matrix is SiO with 4.26 cu capture cross section. 2
Standard dolomite matrix is CaMg(CO ) with 4.70 cu capture cross section.3
If a correction was not applied during acquisition, or if alternative parameter values are
established, the charts allow a new net correction to be computed. The uncorrected
apparent limestone porosity curve NPOR is provided for this purpose.
Corrections are applied in a specific order. For open-hole corrections, enter Chart Npor-6a
with the value of NPOR, and draw a line vertically through the first four nomograms from
the uppermost porosity entry point through to the second porosity scale. A correction is
computed from each nomogram by following the correction curves from the actual
condition to the standard condition. A multiplier is applied to the corrections for borehole
fluid salinity and standoff if the hole size is not 8 in. The total correction is the arithmetic
sum of the individual corrections. Next, transform the resulting porosity into the
appropriate matrix units, using Chart Npor-5, before applying and formation fluid
salinity corrections in Charts Npor-7 and Npor-8. Finally, return to Chart Npor-6a to
perform formation temperature and pressure corrections.
The procedure for applying cased-hole corrections is detailed within Npor-9a.
field logs
Npor Explanatory Note
ma
™Compact Neutron Porosity Matrix Transforms
36 © 2007 Weatherford. All rights reserved.
ma values: Silica 4.26 cu Limestone 7.10 cu Dolomite 4.70 cu
Applicability: Compact series (MDN) tools. value: 22.2 cu.fl
–3 0 5 10 15 20 25 30 35 40
Apparent Limestone Porosity (pu)
Tru
e P
oro
sity
(p
u)
40
35
30
25
20
15
10
5
0
Silica
Lim
esto
ne
Dolom
ite
Use this chart to transform Compact series neutron porosity logs recorded in apparent limestone units into true sandstone and dolomite porosities.
Enter the apparent limestone porosity, and move vertically to the appropriate matrix line. Read the true porosity from the vertical axis.
The transforms are described by the following equations:
sand = 0.000075 – 0.012
– 0.0022
lim3
lim3
lim
lim
+1.43
+0.982
+1.76
–0.88
lim2
lim2
dol = 0.000025
Chart Npor-5
maWhen formation values depart significantly from standard conditions, use Chart Npor-7 to make additional corrections.
™Compact Neutron Porosity Environmental Corrections
37© 2007 Weatherford. All rights reserved.
Applicability: Open-hole logs from Compact series (MDN) tools.
Chart Npor-6a
0 10 20 30 40 50
Apparent Limestone Porosity Units
0 10 20 30 40 50
Pressure(kpsi)
0
5
15
10
20
25
50
100
150
200
250
300
Temperature( F)o
Mud Weight(lb/US gal)
naturalbarite 8
10
12
14
16
18
0
50
100
150
200
250
Bo
reh
ole
Salin
ity
(kp
pm
)
164 8 12
0
1
2
3
Mu
ltip
lier
Hole Size (in.)
0 10 20 30 40 50
Standard condition
0
0.5
1.0
1.5
2.0
2.5
Sta
nd
off (
in.)
4 8 12 16
0.5
0
1.0
1.5
2.0
Mu
ltip
lier
Hole Size (in.)
Temperature(°F)
Hole Size (in.)
2.5 1.5
0.5
Standoff
Corrected Porosity Units
4
0
8
100
6
50
12
200
10
150
14
250
16
Borehole Size
(in.)
Bo
reh
ole
Salin
ity
(kp
pm
)
4 8 12 16
0
1
2
3
Mu
ltip
lier
50
150
100
250
200
300
™Compact Neutron Porosity Matrix Cross Section Corrections
38 © 2007 Weatherford. All rights reserved.
Applicability: Open-hole logs from Compact series (MDN) tools.
Chart Npor-7
0 10 20 30 40 50
Environmentally Corrected Neutron Porosity (pu)
0
10
20
30
40
50
60
70
0 10 20 30 40 500
10
20
30
40
50
60
70
0
10
20
30
40
50
60
70
SandstoneFormations
ma (cu)
LimestoneFormations
ma (cu)
DolomiteFormations
ma (cu)
Standard condition
Use the appropriate nomogram to deduce corrections for variations in matrix sigma values. Sigma corrections associated with variations in formation fluid salinity are specified in Chart Npor-8. Matrix sigma corrections are given by:
2 .= (–2.51a + 11.34a - 8.83) (0.08 exp(–0.04 ) + 0.05)2 .= (–1.37a + 8.78a - 7.41) (0.08 exp(–0.045 ) + 0.25)2 .= (–7.09a + 16.98a - 9.89) (0.11 exp(–0.06 ) + 0.20)
where: = borehole corrected neutron porosity in appropriate matrix units
and a = mama(std) /
ma(std) = 4.26, 7.10, and 4.70 cu, respectively, for standard sand, lime, and dolomite.and
sand
lime
dolomite
3 –8 2 –5. . ..= (–0.07 + 2.0 –3.0) kppm 10 + (0.031 – 0.4 +1.0) kppm 10–3. . – (1.4 +2.0) kppm 10
3 –8 2 –5. . ..= (–0.066 + 3.0 –1.0) kppm 10 + (0.024 – 0.6 +1.2) kppm 10–3. . – ( +1.0) kppm 10
3 –8 2 –5. . ..= (–0.02 + 0.4 –1.0) kppm 10 + (0.022 – 0.1 +1.0) kppm 10–3. . – (2.0 +2.0) kppm 10
™Compact Neutron Porosity Formation Salinity Corrections
39© 2007 Weatherford. All rights reserved.
Applicability: Open-hole logs from Compact series (MDN) tools.
Chart Npor-8
0 10 20 30 40 50
0 10 20 30 40 50
Environmentally Corrected Neutron Porosity (pu)
Standard condition
Use the appropriate nomogram to deduce corrections for variations in formation salinity. If the matrix cross section is known, a correction should first be made using Chart Npor-7. Salinity corrections are approximated by:
250
200
150
100
50
0
SandstoneFormations
Salinity (kppm)
250
200
150
100
50
0
LimestoneFormations
Salinity (kppm)
250
200
150
100
50
0
DolomiteFormations
Salinity (kppm)
where: = borehole corrected neutron porosity in appropriate matrix units
sand 2 2
lime 2 2
dolomite 2 2
™Compact Neutron Porosity Cased-Hole Corrections
40 © 2007 Weatherford. All rights reserved.
Applicability: Cased-hole logs from Compact series (MDN) tools.
Chart Npor-9a
Standard condition
0 10 20 30 40 50
0 10 20 30 40 50
Apparent Limestone Porosity Units (pu)
14
16
12
10
8
6
4
0.5
0.6
0.4
0.3
0.2
0.1
0
2.5
3.0
2.0
1.5
1.0
0.5
0
Casing ID(in.)
Casing Thickness(in.)
Cement Thickness(in.)
In cased holes substitute this chart for the open-hole borehole size correction. Enter the chart with uncorrected porosity in apparent limestone units (NPOR or uncorrected NPRL), and draw a vertical line through each nomogram. Derive values from each nomogram by marking the intersection with the given casing ID, casing thickness and cement thickness values; then move parallel to the nearest curve to the standard condition. Sum the values to find the total correction. Apply any remaining environmental corrections at this point.
Example: casing ID = 5 in., casing thickness = 0.5 in., cement thickness = 1.25 in. For NPOR = 28 pu, corrected porosity = 28 + (3.9 – 7.5 – 6.6) = 17.8 pu.
Cement Thickness
Casing ID
3 2Casing Thickness 3 2= ( (0.59 t – 0.235 t – 0.75 t).0.00004 – 0.0135 + 1.0877 )
2 3 2.= (–0.0009 + 0.13 + 0.05) (0.087h – 0.33h – 1.5 h )h = cement thickness in in.
t = casing thickness in inches
.= f( ) f( c)
where
c = (caliper – 8.0) in.
3 2f( ) = 0.0000027 – 0.00137 + 0.1484 + 1.63 2f( c ) = –0.00017c + 0.0131c – 0.232c
™Compact Neutron Porosity Environmental Correction Equations
41© 2007 Weatherford. All rights reserved.
Porosity ( ) in pu. Range: as Chart Npor-6a.
Applicability: Open-hole logs from Compact series (MDN) tools.
o.= (0.0007 + 0.001) ( F – 68)
Borehole Size
General
To determine whether a particular environmental correction was applied during acquisition, refer to the correction parameter value recorded on the log tail; if it is equal to the standard condition value, then no correction was applied. Corrections are additive.
To compute corrections for borehole size, borehole fluid salinity, standoff, and mud weight based on alternative parameter values, use the relevant equations applied to the raw Apparent Limestone Porosity curve (mnemonic NPOR). Temperature and pressure corrections should be applied after matrix and formation fluid salinity corrections have been made.
where
c = (caliper – 8.0) in.23f( ) = –0.0000027 – 0.00137 + 0.1484 + 1.61
Borehole Fluid Salinity
.= k (0.05 + 1.0 ) MDNACL / 250
where
where
k = (caliper – 2.25)/5.75 in.
Standoff 3 2. . = f(standoff) f( ) (caliper /2,048+caliper /256+caliper/16)
Mud Weight
Natural Muds
.= (0.0143 + 0.1786) (w – 8.345)
.= (0.0057 + 0.0714) (w – 8.345)
Barite Muds
wherew = mud weight in lb/US gal
Borehole Temperature
Pressure
.= (0.02 – 0.004 ) kpsi
MDNACL = NaCl equivalent salinity in kppm
k = (caliper – 2.25)/ 5.75 in.
2f(standoff) = 0.8s – 4.4 s
s = standoff / k in.
f( ) =– 0.0005 +0.034 +0.62
Lithology-Porosity from Density-Neutron Crossplot
42 © 2007 Weatherford. All rights reserved.
Applicability: MPD and MDN tools, environmentally corrected.
3 3Formation fluid density = 1.0 g/cm (Mg/m ).
Chart LPC-1
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
33
Bu
lk D
en
sity
(g
/cm
o
r M
g/m
)
0 5 10 15 20 25 30 35 40
Apparent Limestone Porosity (pu)
Dolom
ite
Porosit
y
0
5
10
15
40
0
0
5
10
15
15
20
25
30
30
35
35
40
45
40
35
30
25
20
15
10
5
0
–5
–10
–15
3D
en
sity
Po
rosi
ty (
pu
) (
=
2.7
1 g
/cm
)m
a
Sandst
one
Limesto
ne
35
30
20
20
25
10
5
25
Lithology-Porosity from Density-Neutron Crossplot
43© 2007 Weatherford. All rights reserved.
Applicability: MPD and MDN tools, environmentally corrected.
3 3Formation fluid density = 1.19 g/cm (Mg/m ).
Chart LPC-2
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
33
Bu
lk D
en
sity
(g
/cm
or
Mg
/m)
0 5 10 15 20 25 30 35 40
Apparent Limestone Porosity (pu)
Dolomite
Porosit
y
0
5
10
15
20
25
30
35
40
0
0
5
5
10
10
15
15
20
20
25
25
30
30
35
35
40
45
40
35
30
25
20
15
10
5
0
–5
–10
–15
3D
en
sity
Po
rosi
ty (
pu
) (
=
2.7
1 g
/cm
)m
a
Sandstone
Limesto
ne
Lithology-Porosity from Sonic-Neutron Crossplot
44 © 2007 Weatherford. All rights reserved.
Applicability: MDN tools, environmentally corrected.
Formation fluid slowness = 189 ms/f t (620 ms/m).
Chart LPC-5
0 5 10 15 20 25 30 35 40
Apparent Limestone Porosity (pu)
Lim
esto
neDol
omite
Poro
sity
00
5
10
15
15
20
20
25
30
30
40
40
50
60
70
80
90
100
110
So
nic
Tra
nsi
t T
ime (
ms
/ft )
35
140
160
180
200
220
240
260
280
300
360
340
320
So
nic
Tra
nsi
t T
ime (
ms/
m)
0
5
10
15
20
25
35
40
10
30
San
dsto
ne
Time average
Raiga-Clemenceau
30
15
35
30
35
25
20
15
10
5
35
30
25
20
15
10
20
25
10
5
5
25
San
dst
on
e D
en
sity
Po
rosi
ty (
pu
)
00
5
5
10
10
15
15
20
20
25
25
30
30
35
35
40
40
45
45
50
55
Sandstone Neutron Porosity (pu)
40
45
30
35
30
35
20
55
1010
1515
20
2525
40
45
Porosity
20%
20%
0%
80%
80%
60%
40%
40%
100%
100%
Sxo
Sxo
60%
7,000 psi and 248 F (120°C)°
2,000 psi and 122 F (50°C)°
Use this chart to compute porosity and gas saturation in gas-bearing formations. It assumes a mixture of methane, fresh water, and silica sand.
Enter with borehole corrected neutron porosity in apparent sandstone units and density porosity computed using an apparent filtrate density of 1.0 g/cc.
Chart Gas-1
Porosity and Saturation from Density-Neutron Porosity Plot
Applicability: MPD and MDN tools, borehole corrected.
Formation fluid salinity = 0 ppm, gas-bearing formations
45© 2007 Weatherford. All rights reserved.
Lithology-Porosity from Density-Pe Crossplot
Applicability: MPD series tools.
3 3Fresh-water-filled formations, fluid density = 1.0 g/cm (Mg/m ).
Chart Lpor-11
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
33
Bu
lk D
en
sity
(g
/cm
o
r M
g/m
)
0 6.01.0 2.0 3.0 4.0 5.0
Photoelectric Cross Section (barns/electron)
0
0
0
0
10
10
10
20
20
20
30
30
30
40
40
40
Lim
est
on
e
Do
lom
ite
San
dst
on
e
Salt
46 © 2007 Weatherford. All rights reserved.
Lithology-Porosity from Density-Pe Crossplot
Applicability: MPD series tools.
3 3Salt-water-filled formations, fluid density = 1.19 g/cm (Mg/m )
Chart Lpor-12
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
33
Bu
lk D
en
sity
(g
/cm
o
r M
g/m
)
0 6.01.0 2.0 3.0 4.0 5.0
Photoelectric Cross Section (barns/electron)
0
0
0
0
10
10
10
20
20
20
30
30
30
40
40
40
Lim
est
on
e
Do
lom
ite
San
dst
on
e
Salt
47© 2007 Weatherford. All rights reserved.
Matrix Identification from the PhotoDensity
Chart Lith-2
33
, A
pp
are
nt
Matr
ix G
rain
Den
sity
(g
/cm
or
Mg
/m)
maa
2.5
2.6
2.7
2.8
2.9
3.0
3.12 4 6 8 10 12 14 16
3U , Apparent Matrix Volumetric Cross Section (barns/cm )maa
2040
6080
% Calcite
20
40
60
80 % Dolomite
20
40
60
80
% Q
uartz
Quartz
Dolomite
Calcite
Salt
Barite
Shale
fmaa
log t–
t1–= tPe e –
t–1UfUmaa =and
ftwhere is total porosity, is formation fluid density, U is formation fluid volumetric cross fsection, and is the formation electron density given by:e
e log= log 3( > 2.71 g/cm )
e log= + 0.065 log 3( < 1.687 g/cm )e log= ( + 0.187797)/1.07009 log 3(1.687 < < 2.71 g/cm )
Water (fresh) 1.00 0.40Water (200 kppm NaCl) 1.11 1.36Oil 1.22 – 0.19 0.14Gas 1.33 – 0.19 0.12
f Uff UfTypical values for the fluid parameters and are:
This chart is used to identify matrix components in mixed-lithology formations. Input data are density, Pe, and total porosity computed, for example, from a density-neutron crossplot.
The apparent matrix grain density and the apparent matrix volumetric cross section U are computed as:maa
maa
oiloil
gas gas
48 © 2007 Weatherford. All rights reserved.
ZMName
MDN
p.u.
tc
s/ft
ts
s/ft
log log*3(g/cm ) 3(g/cm )Chemical Formula
Pe
(barn/electr.)
U
3(barn/cm )
Quartz
Calcite
Dolomite
SiO2
CaCO3
CaMg(CO )3 2
0.499
0.500
0.498
2.65 2.65
2.71 2.71
2.87 2.86
4.8
13.8
9.0
–1.2
0.0
0.9
56
46
42
Anhydrite
Barite
Gypsum
Halite
Sylvite
CaSO4
BaSO4
CaSO .2H O4 2
NaCl
KCl
0.499
0.446
0.511
0.479
0.483
2.98 2.96
4.08 3.99
2.35 2.35
2.03 2.03
1.86 1.86
14.9
1,060.6
9.5
9.6
16.3
–1.5
2.0 –
58.0
2.0 –
2.0 –
51
69
52
67
74
Siderite
Hematite
Magnetite
Goethite
Pyrite
FeCO3
Fe O2 3
Fe O3 4
FeO(OH)
FeS2
0.483
0.476
0.475
0.484
0.483
3.91 3.83
5.16 5.00
5.07 4.92
4.23 4.13
4.99 4.84
56.0
107.3
108.9
78.1
81.8
12.0
11.0
9.0
60.0+
2.0 –
44
44
72
39
Orthoclase
Anorthoclase
Albite
Anorthite
KAlSi O3 8
(Na,K)AlSi O3 8
NaAlSi O3 8
CaAl Si O2 2 8
0.496
0.496
0.496
0.496
2.54 2.54
2.59 2.59
2.58 2.58
2.74 2.74
2.86 7.2
7.4
4.4
8.6
2.0 –
1.0 –
1.0 –
–1.0
69
47
45
Kaolinite
Montmorillonite
Illite
Al Si O (OH)4 4 10 8
Al (Si O ) .nH O4 4 10 2 2
K Al (Si Al )y 4 8-y y
O (OH)20 4
0.504
0.502
0.499
2.64 2.64
2.63 2.63
2.76 2.76
3.9
4.3
9.5
40.0
47.0
35.0
212
Muscovite
Biotite K(Mg,Fe) AlSi O3 3 10
(OH)2
0.497
0.493
2.83 2.82
3.19 3.16
6.8
19.2
20.0
21.0
47
49
88
89
77
98
133
120
140
85
74
155
62
98
328
82
79
Bituminous Coal
Anthracite
Lignite
CH N On x y
CH N On x y
CH N On x y
0.527
0.513
0.525
1.29 1.31
1.55 1.54
1.28 1.25
1.81
5.08
3.14
5.05
265.56
3.99
4.65
8.51
14.62
21.48
22.14
18.90
16.89
2.86
1.68
3.13
1.49
1.63
3.45
2.40
6.27
0.17
0.16
0.20
0.2
0.3
0.3
60.0+
40.0
54.0
120
105
160
r r DD
mm
FS
* Z/A correction set to Advanced
Log Responses in Common Rocks and Minerals
Applicability: Compact series tools, standard conditions.
Chart Lith-3c49© 2007 Weatherford. All rights reserved.
Compact Curve Mnemonics™
Curve Mnemonic
50 © 2007 Weatherford. All rights reserved.
AIAT AIBT AIIT AIR1 AIR2 AIR3 AIR4 AIST AITC AIX1 AIX2 AIX3 AIX4
APOR CIL1 CIL2 CIL3 CIL4 CILD CILM CILS IHTD IHTF RILD RILM SYM1 SYM2 SYM3 SYM4 VEC0 VEC1 VEC2 VEC3 VEC4 VEC5 ACCF BAZI BAZT BNBT BNGR BNIT BNST BNXA BNXM BNYA BNYM BNZA BNZM BTLF BTLT BZAC BZAT GBNE GRBG HSBA MAGF
MAI Array Temperature Borehole Temperature Raw MAI Internal Temperature
Induction Receiver 1 Induction Receiver 2 Induction Receiver 3 Induction Receiver 4
MAI Status MAI Transmitter Current
Induction VX1 Induction VX2 Induction VX3 Induction VX4
Apparent Porosity Conductivity Receiver 1 Conductivity Receiver 2 Conductivity Receiver 3 Conductivity Receiver 4
Deep Conductivity Medium Conductivity Shallow Conductivity
Differential Temperature Borehole Temperature
Deep Induction Medium Induction
Symmetrised Receiver 1 Symmetrised Receiver 2 Symmetrised Receiver 3 Symmetrised Receiver 4
Shallow Induction Near Induction
Near Medium Induction Far Medium Induction
Far Induction Deepest Induction
Acceleration Magnitude Borehole Azimuth (Mag.) Borehole Azimuth (True)
MBN Bulkhead Temperature Gamma Ray Raw
MBN Internal Temperature MBN Status
X Accelerometer X Magnetometer Y Accelerometer Y Magnetometer Z Accelerometer Z Magnetometer
Filtered Borehole Tilt Borehole Tilt
Z Accelerometer Counts Z Accelerometer Time
Borehole Corrected Gamma Gamma Ray
Relative Bearing (HS) Field Magnitude
Compact Array Induction
Compact Borehole NavigationMBN
MAI
Tool DescriptionCurve Description Tool
™Compact Curve Mnemonics
Mnemonics Mnemonics Description Tool Tool Description
51© 2007 Weatherford. All rights reserved.
Curve Mnemonic
NDAA NDPT NSPD RAZI SAAZ SRBA CCLG CGCL CGDT CGFR CGGR CGIT CGSP CGST CGVN CGVP CGVT CGXT GGCE GRGC SPCG DNFD DNFT DNIT
DNND DNNT DNST NPOR NPRD NPRL NPRS NRAT FEFC FEFE FEFR FEFV FEIT
FEQC FEQR FEQS FERI FERV FESI FEST FEXI FEXV BHUN BONE BTEN BTHO BTTH FCCP FCIT
FCMC FCMSFCMT
Depth Difference Speed Corrected Depth PROCESSED Speed Azimuth of Reference
Apparent Azimuth Relative Bearing
Casing Collar Locator CCL Raw
Downhole Tension Fluid Resistance Gamma Ray Raw
MCG Internal Temperature SP Raw
MCG Status Line Voltage (–ve) Line Voltage (+ve)
Line Voltage MCG External Temperature Borehole Corrected Gamma
Gamma Ray Spontaneous Potential
Far Neutron Raw Far Neutron Dead Time
MDN Internal Temperature Near Neutron Raw
Near Neutron Dead Time MDN Status
Base Neutron Porosity Dolomite Neutron Por.
Limestone Neutron Por. Sandstone Neutron Por. Neutron Ratio (Near/Far) Shallow FE (Phase Corr.)
Shallow FE Shallow FE (No Corr.)
MFE Fish Voltage MFE Internal Temperature Quadrature FE (Phase C.) Quadrature FE (No Corr.)
Quadrature FE MFE Current MFE Voltage
MFE Sense DC Current MFE Status
MFE Quadrature Current MFE Quadrature Voltage
Paine P. (Abs) 100s Paine P. (Abs) 1s
Paine P. (Abs) 10s Paine P. (Abs) 1000s
Paine P. (Abs) 10000s MFC Caliper
MFC Internal Temperature MFC Motor Current MFC Motor Speed
MFC Motor Temperature
Compact Comms Gamma
Compact Borehole NavigationMBN
MCG
Tool DescriptionCurve Description Tool
Compact Dual Neutron MDN
Compact Focused ElectricMFE
Compact Formation TesterMFT
Compact Curve Mnemonics™
52 © 2007 Weatherford. All rights reserved.
Curve Mnemonic
FCST FPEX FPGP FPGT FPIT
FPMC FPMS FPMT FPNG FPPP FPPS FPPV FPQC FPQH FPQT FPST PGAB PGPF PHUN PKEY PONE PSVL PTEN PTHO PTTH QDPF QFRC QHUN QONE QTEM QTEN QTHO QTTH TPRE GDIT GDLO GDST GDUP GCSL GGME GRGM GSCL GSFR GSGR GSIT GSSP GSST GSVN GSVP GSVT GSXT SPGS BHTD BHTF HTBTHTIT
MFC Section Status MFP Extended Status Paine Pressure Raw
Paine Gauge Temperature MFP Internal Temperature
MFP Motor Current MFP Motor Speed
MFP Motor Temperature Paine Voltage ( ve)
Piston Position Paine Voltage (+ve)
Paine Voltage Quartzdyne Pressure (C)
Quartzdyne Temp. (C) Quartzdyne Reference
MFP Section Status Paine Pressure (Abs)
Paine Pressure (Gauge) Paine P. (Gge) 100s
Piston Control Paine P. (Gge) 1s
Piston Swept Volume Paine P. (Gge) 10s
Paine P. (Gge) 1000s Paine P. (Gge) 10000s Quartzdyne Pressure Quartzdyne Fraction
Quartzdyne 100s Quartzdyne 1s
Quartzdyne Temperature Quartzdyne 10s
Quartzdyne 1000s Quartzdyne 10000s
Pretest Time MGD Internal Temperature
Lower Gas Detector MGD Status
Upper Gas Detector MCL C. Collar Locator
Borehole Corr. MGS Gamma MGS Gamma Ray
MGS CCL Raw MGS Fluid Resistance MGS Gamma Ray Raw
MGS Internal Temperature MGS SP Raw MGS Status
MGS Line Voltage (–ve) MGS Line Voltage (+ve)
MGS Line Voltage MGS External Temperature
MGS SP Differential Temperature Borehole Temperature
Borehole Temperature Raw MHT Internal Temperature
–
Tool DescriptionCurve Description Tool
Compact Gas DetectorMGD
Compact Formation TesterMFT
Compact High-res TempMHT
Compact Gamma SondeMGS
53© 2007 Weatherford. All rights reserved.
™Compact Curve Mnemonics
Mnemonics Mnemonics Description Tool Tool DescriptionCurve Mnemonic
HTST AZII BT1L BT1U BT2L BT2U BT3L BT3U BT4L BT4U BT5L BT5U BT6L BT6U BT7L BT7U BT8L BT8U BTM1 BTM2 BTM3 BTM4 BTM5 BTM6 BTM7 BTM8 BTN1 BTN2 BTN3 BTN4 BTN5 BTN6 BTN7 BTN8 CORI DI26 DI48 DIPI IAAZ IACF IAP1 IAZI IAZT IEAT IEAX IEAY IEB1 IEB2 IEB3 IEB4 IEB5 IEB6 IEB7 IEB8 IEBT IEC2
MHT Status Dip Azimuth From Imager Imager Pad 1 Lower Row Imager Pad 1 Upper Row Imager Pad 2 Lower Row Imager Pad 2 Upper Row Imager Pad 3 Lower Row Imager Pad 3 Upper Row Imager Pad 4 Lower Row Imager Pad 4 Upper Row Imager Pad 5 Lower Row Imager Pad 5 Upper Row Imager Pad 6 Lower Row Imager Pad 6 Upper Row Imager Pad 7 Lower Row Imager Pad 7 Upper Row Imager Pad 8 Lower Row Imager Pad 8 Upper Row Imager Pad 1 Md. Current Imager Pad 2 Md. Current Imager Pad 3 Md. Current Imager Pad 4 Md. Current Imager Pad 5 Md. Current Imager Pad 6 Md. Current Imager Pad 7 Md. Current Imager Pad 8 Md. Current
Imager Pad 1 Imager Pad 2 Imager Pad 3 Imager Pad 4 Imager Pad 5 Imager Pad 6 Imager Pad 7 Imager Pad 8
Dip Cor. From Imager Imager Diameter 2 – 6 Imager Diameter 4 – 8 Dip Angle From Imager
Apparent Azimuth Acceleration Magnitude Azimuth of Reference
Borehole Azimuth (Mag.) Borehole Azimuth (True) MIE Acc. Temperature MIE Accelerometer X MIE Accelerometer Y
MIE Button 1 MIE Button 2 MIE Button 3 MIE Button 4 MIE Button 5 MIE Button 6 MIE Button 7 MIE Button 8
MIE Board Temperature MIE Caliper 2
Tool DescriptionCurve Description Tool
Compact Imager ElectrodesMIE
Compact High-res TempMHT
54 © 2007 Weatherford. All rights reserved.
Compact Curve Mnemonics™
Curve Mnemonic
IEC4 IEC6 IEC8 IECX IECY IECZ IEDA IEDC IEDD IEDI IEDZ IEMI IEMP IEMX IEMY IEMZ IEOF IEP1 IEP2 IEP3 IEP4 IEP5 IEP6 IEP7 IEP8 IEPA IEPT IES0 IES1 IETT IETX IETY IETZ IEVR IEXA IEYA IEZC IEZT IFTT IMAX IMAY IMGF IMGX IMGY IMGZ IMT1 IMT3 IMT5 IMT7 IMZA IRBR IRHS IRKT ITLT
NDCC NDPI
MIE Caliper 4 MIE Caliper 6 MIE Caliper 8 MIE Caliper X MIE Caliper Y
MIE Acc. Z Counts MIE Drive Volts (Arm)
MIE Data Counter MIE Drive Volts (Dref)
MIE Drive Current MIE Acc. Z Time
MIE Motor Current MIE Motor Position
MIE Magnetometer X MIE Magnetometer Y MIE Magnetometer Z
MIE A/D Offset MIE Pad 1 Data MIE Pad 2 Data MIE Pad 3 Data MIE Pad 4 Data MIE Pad 5 Data MIE Pad 6 Data MIE Pad 7 Data MIE Pad 8 Data
MIE Parity MIE Pad Temperature
MIE Status 0 MIE Status 1
MIE Accelerometer Temp. MIE Magnetometer X MIE Magnetometer Y MIE Magnetometer Z MIE Volt Reference
MIE Accelerometer X MIE Accelerometer Y MIE Acc. Z Counts MIE Acc. Z Time
Filtered Borehole Tilt MIE Accelerometer X MIE Accelerometer Y
Field Magnitude MIE Magnetometer X MIE Magnetometer Y MIE Magnetometer Z
Imager Trace 1 Imager Trace 3 Imager Trace 5 Imager Trace 7 Z Accelerometer Relative Bearing
Relative Bearing (HS) Breakout Angle
Borehole Tilt Depth Difference
Speed Corrected Depth
Tool DescriptionCurve Description Tool
Compact Imager ElectrodesMIE
55© 2007 Weatherford. All rights reserved.
™Compact Curve Mnemonics
Mnemonics Mnemonics Description Tool Tool DescriptionCurve Mnemonic
NSPI RAX1 RAX5 RAY3 RAY7 IMCB IMCC IMCF IMCK IMCP IMGR IMIT
IMMN IMS0 IMS1 IMS2 IMSD DA1F DDIF DDLB DDLL DDMR DDVF DGLL DGVF DLA1 DLDC DLDG DLDI DLDV DLGV DLIT DLSC DLSF DLSG DLSI DLSP DLST DLSV DLV1 DLVD DLVR DLVS DLZS DSGF DSIF DSLB DSLL DSMR DSVF DV1F M333 M33B M444 M44B M555
PROCESSED Speed Imager Pad 1 Radius Imager Pad 5 Radius Imager Pad 3 Radius Imager Pad 7 Radius
MIM Current Block MIM Current Chip
MIM Current File Number MIM Time/Date
MIM Current Page MMI Image
MIM Internal Temperature MMI Image Mean
MIM Status 0 MIM Status 1 MIM Status 2
MMI Image Standard Dev. Filtered A1D Voltage Filtered Deep Current
Corrected Deep Laterolog Deep Laterolog
Deep App. Mud Res. Filtered Deep Voltage Groningen Laterolog
Filt. Groningen Voltage A1D Electrode Voltage Deep Current Check Deep Guard Current
Deep Current Deep Voltage
Groningen Voltage MDL Internal Temperature
Shallow Current Check MDL Status 2
Shallow Guard Current Shallow Current SP Voltage Raw
MDL Status 1 Shallow Voltage
V1 Electrode Voltage Deep Voltage Check Voltage Reference
Shallow Voltage Check A/D Zero Voltage
Filt Shal Guard Current Filtered Shallow Current Corr. Shallow Laterolog
Shallow Laterolog Shallow App. Mud Res. Filtered Shallow Voltage
Filtered V1 Voltage Shallow Laterolog Cond. Corr. Shallow Lat. Cond. Deep Laterolog Cond.
Corr Deep Laterolog Cond Groningen Laterolog Con.
Tool DescriptionCurve Description Tool
Compact Laterolog ElectrodeMLE
Compact Imager ElectrodesMIE
Compact Imager MemoryMIM
56 © 2007 Weatherford. All rights reserved.
Compact Curve Mnemonics™
Curve Mnemonic
M66B SPDL M111 M222 MINV MLCP MLIT MLIV
MLMC MLMV MLNV MLST MLTC MMLI MNRL M666 M777 M888 M999 MACP MAI1 MAI2 MAIT
MAMC MAMV MAST MATC MAV1 MBCP MBIT MBIV MBLI
MBMC MBMV MBNV MBST MBTC MINV MNRL MRRG MRRS MRSB MMAD MMBT MMBV MMCK MMDC MMIT
MMOV MMPD MMPP MMSF MMSN MMST MMVR CLDC
Corr. MicroRes (S) Cond. Spontaneous Potential
Micro-normal Cond. Micro-Inverse Cond.
Micro-inverse MML Caliper Raw
MML Internal Temperature Micro-inverse Voltage MML Motor Current MML Motor Voltage
Micro-normal Voltage MML Status MML Caliper
Micro-normal Current Micro-normal
MicroRes (S) Cond. MicroRes (G) Cond.
MMR MicroLog Normal Con. MMR MicroLog Inverse Con
MMR Caliper Raw MMR MicroRes Current 1 MMR MicroRes Current 2 MMR Internal Temperature
MMR Motor Current MMR Motor Voltage
MMR Status MMR Caliper
MMR MicroRes Voltage 1 MMR Caliper Raw
MMR Internal Temperature MMR MicroLog Voltage (I)
MMR MicroLog Current MMR Motor Current MMR Motor Voltage
MMR MicroLog Voltage (N) MMR Status MMR Caliper
MMR MicroLog Inverse MMR MicroLog Normal
MicroRes Resistance (G) MicroRes Resistance (S) Corr MicroRes Resis. (S)
MMS.C A/D Offset Voltage MMS.C Borehole Temp. MMS.C Battery Voltage
MMS.C Sonde Time MMS.C DC+ DC–
MMS.C Board Temperature MMS.C 0V Offset
MMS.C Paine Drive Volt. MMS.C Paine Pressure
MMS.C Flash Mem. Status MMS.C Sample Number
MMS.C Status MMS.C Reference Voltage
Density Caliper
Tool DescriptionCurve Description Tool
Compact Laterolog ElectrodeMLE
Compact MicroLogMML
Compact Memory SondeMMS-C
Compact MicroResistivityMMR
Compact Photo DensityMPD
57© 2007 Weatherford. All rights reserved.
™Compact Curve Mnemonics
Mnemonics Mnemonics Description Tool Tool DescriptionCurve Mnemonic
DCCP DCOR DEN
DENF DENN DPOR DPRD DPRL DPRS FMDT HDEN MTXD NMDT PCIT
PCMC PCST PDFC PDFE PDFL PDFS PDFT PDHD PDIT
PDNC PDNE PDNL PDNS PDNT PDPE PDSF PDST PFSD PFTC PNSD PNTC XPOR AVOL DFCL HVOL GCGR
GR GRPO GRTH GRUR HTSG RAKT RAKU RAUT SGD1 SGD2 SGD3 SGD4 SGD5 SGD6 SGG1 SGG2
Density Caliper Raw Density Correction
Compensated Density Far Spaced Density
Near Spaced Density Base Density Porosity Dolomite Density Por.
Limestone Density Por. Sandstone Density Por. Far Mean Dead Time
Vectar Processed Density Matrix density
Near Mean Dead Time MPD Internal Temperature
MPD Motor Current MDC Status
Far Density Counts MPD Far EHT
Far Lock Counts Far Density Spectrum
Far Density Dead Time MPD PE Hard Counts
MPD Internal Temperature Near Density Counts
MPD Near EHT Near Lock Counts
Near Density Spectrum Near Density Dead Time
PE MPD PE Soft Counts
MPD Status Far Density SDU
Far Total Counts, No D/T Near Density SDU
Near Total Counts, No D/T Crossplot Porosity Annular Volume
Differential Caliper Hole Volume
SGS Corrected Gamma Ray SGS Gamma Ray Potassium Gamma Thorium Gamma Uranium Gamma
SGS EHT 2 TH/K U/K
TH/U Disc. 1 (Gamma Ray Raw)
Disc. 2 Disc. 3 Disc. 4 Disc. 5 Disc. 6 Gate 1 Gate 2
Tool DescriptionCurve Description Tool
Compact Photo DensityMPD
Compact Spectral GammaMSG
MPD, MTC, MML, MMR, MIEMPD, MTC, MML, MMR
MPD, MTC, MML, MMR, MIE
58 © 2007 Weatherford. All rights reserved.
Compact Curve Mnemonics™
Curve Mnemonic
SGG3 SGG4 SGG5 SGHT STSG DL11 DL12 DL21 DL22 DT34 DT35 DT45 DT46 DT56 DTSM FGAP FGTR FGTT PK11 PK12 PK21 PK22PT11 PT12 PT21 PT22 RN11 RN12 RN21 RN22 SEM1 SEM2 SHRD SHRL SHRS SIV1 SIV2
SPRD SPRL SPRS STGN STIT STPK STSS STWS TR11 TR12 TR21 TR22 TS11 TS12 TS21 TS22 VL34 VL35 Vl45
Gate 3 Gate 4 Gate 5
SGS EHT 1 SGS Status
4' Discriminator Level 6' Discriminator Level 3' Discriminator Level 5' Discriminator Level
3–4' Compensated Sonic 3–5' Compensated Sonic 4–5' Compensated Sonic 4–6' Compensated Sonic 5–6' Compensated Sonic
Smeared 3–4' Sonic Fixed Gate Peak Ampl.
Fixed Gate Peak Tr. Time Fixed Gate Dsc. Tr. Time
4' Peak Amplitude 6' Peak Amplitude 3' Peak Amplitude 5' Peak Amplitude
4' Time To Pk. Amplitude 6' Time To Pk. Amplitude 3' Time To Pk. Amplitude 5' Time To Pk. Amplitude 4' Road Noise Max. Defl. 6' Road Noise Max. Defl. 3' Road Noise Max. Defl. 5' Road Noise Max. Defl.
Waveform-PROCESSED Semb. 1 Waveform-PROCESSED Semb. 2
Dolomite H-R Sonic Por. Limestone H-R Sonic Por. Sandstone H-R Sonic Por.
Waveform-PROCESSED Sonic 1 Waveform-PROCESSED Sonic 2
Dolomite Sonic Porosity Limestone Sonic Porosity Sandstone Sonic Porosity
MSS Gain Status MSS Internal Temperature
MSS Peak Status MSS Status
MSS Waveform Seg. Status 4' Transit Time 6' Transit Time 3' Transit Time 5' Transit Time
4' Transit Time Set 6' Transit Time Set 3' Transit Time Set 5' Transit Time Set
3–4' Compensated Sonic 3–5' Compensated Sonic 4–5' Compensated Sonic
Tool DescriptionCurve Description Tool
Compact Sonic SondeMSS
Compact Spectral GammaMSG
59© 2007 Weatherford. All rights reserved.
™Compact Curve Mnemonics
Mnemonics Mnemonics Description Tool Tool DescriptionCurve Mnemonic
VL46 VL56 VLSM WF11 WF12 WF21 WF22 WL11 WL12 WL21 WL22 WS11 WS12 WS21 WS22 WSEG MSPD SMDA SMDB SMM0 SMM1 SMM2SMM3 SMM4 SMM5 SMM6 SMM7 SMST SMTD SMTU CLTC CLXC CLYC CLZC TCCP TCIT
TCMC TCMV TCST XCCP XCIT
XCMC XCMV XCST YCCP YCIT
YCMC YCMV YCST ZCCP ZCIT
ZCMC ZCMV ZCST SBHN SBNE
4–6' Compensated Sonic 5–6' Compensated Sonic
Smeared 3–4' Sonic 4' Waveform 6' Waveform 3' Waveform 5' Waveform
4' Peak Window Length 6' Peak Window Length 3' Peak Window Length 5' Peak Window Length 4' Peak Window Start 6' Peak Window Start 3' Peak Window Start 5' Peak Window Start Waveform Segment
Logging Speed DST Analog Channel A DST Analog Channel B
SMS Channel 0 SMS Channel 1 SMS Channel 2 SMS Channel 3 SMS Channel 4 SMS Channel 5 SMS Channel 6
SMS Channel 7 (temp.) SMS Status
DST Downhole Tension DST Uphole Tension
Two-Arm Caliper X Two-Arm Caliper Y Two-Arm Caliper Z Two-Arm Caliper
Two-Arm Caliper Raw MTC Internal Temperature
MTC Motor Current MTC Motor Voltage
MTC Status Two-Arm X caliper Raw
MTX Internal Temperature MTX Motor Current MTX Motor Voltage
MTX Status Two-Arm Y Caliper Raw
MTY Internal Temperature MTY Motor Current MTY Motor Voltage
MTY Status Two-Arm Z Caliper Raw
MTZ Internal Temperature MTZ Motor Current MTZ Motor Voltage
MTZ Status SER Paine P. (A) 100s
SER Paine P. (A) 1s
Tool DescriptionCurve Description Tool
Compact Service UnitMSU
Compact Two-arm CaliperMTC
Shuttle Electric ReleaseSER
Compact Sonic SondeMSS
60 © 2007 Weatherford. All rights reserved.
Compact Curve Mnemonics™
Curve Mnemonic
SBTH SBTN SBTO SPET SPEX SPGB SPGF SPGP SPHN SPIT
SPMC SPMS SPMT SPNG SPOE SPPP SPPS SPPV SPQC SPQH SPQT SPSL SPST SPTH SPTN SPTO SQDF SQFC SQHN SQOE SQTE SQTH SQTM SQTO WBHN WBNE WBTH WBTN WBTO WQDF WQFC WQHN WQOE WQTE WQTH WQTM WQTO WRET WREX WRGB WRGF WRGP WRHN WRIT
WRMC WRMS
SER Paine P. (A) 10000s SER Paine P. (A) 10s
SER Paine P. (A) 1000s SER Paine Gauge Temp.
SER Extended Status SER Paine Pressure (Abs) SER Paine Pres. (Gauge) SER Paine Pressure Raw
SER Paine P. (G) 100s SER Internal Temperature
SER Motor Current SER Motor Speed
SER Motor Temperature SER Paine Voltage (–ve)
SER Paine P. (G) 1s SER Piston Position
SER Paine Voltage (+ve) SER Paine Voltage
SER Quartzdyne Pres. (C) SER Quartzdyne Temp. (C) SER Quartzdyne Reference SER Piston Swept Volume
SER Section Status SER Paine P. (G) 10000s
SER Paine P. (G) 10s SER Paine P. (G) 1000s
SER Quartzdyne Pressure SER Quartzdyne Fraction
SER Quartzdyne 100s SER Quartzdyne 1s
SER Quartzdyne 10s SER Quartzdyne 10000s SER Quartzdyne Temp. SER Quartzdyne 1000s WRT Paine P. (A) 100s
WRT Paine P. (A) 1s WRT Paine P. (A) 10000s
WRT Paine P. (A) 10s WRT Paine P. (A) 1000s
WRT Quartzdyne Pressure WRT Quartzdyne Fraction
WRT Quartzdyne 100s WRT Quartzdyne 1s
WRT Quartzdyne 10s WRT Quartzdyne 10000s WRT Quartzdyne Temp. WRT Quartzdyne 1000s
WRT Paine Gauge Temp. WRT Extended Status
WRT Paine Pressure (Abs) WRT Paine Pres. (Gauge) WRT Paine Pressure Raw
WRT Paine P. (G) 100s WRT Internal Temperature
WRT Motor Current WRT Motor Speed
Tool DescriptionCurve Description Tool
Wireline Release ToolWRT
Shuttle Electric ReleaseSER
61© 2007 Weatherford. All rights reserved.
™Compact Curve Mnemonics
Mnemonics Mnemonics Description Tool Tool DescriptionCurve Mnemonic
WRMT WRNG WROE WRPP WRPS WRPV WRQC WRQH WRQT WRSL WRST WRTH WRTN WRTO BCDC BCDL BCMC BCML BCSC BCSL BMOD CLPR COAL COMP DCAL DENA DES1 DES2 DILL DPHI DTA
DTP1 DTP2 DTP3 DTP4 DTP5 EDIT ESTP FEDT
FF FGAS FHT0
FP FPRF FPSH FRPG
FT FWD1 FWD2 FWD3 FWD4 FWD5 GMOD
HI INVD INVM
WRT Motor Temperature WRT Paine Voltage (–ve)
WRT Paine P. (G) 1s WRT Piston Position
WRT Paine Voltage (+ve) WRT Paine Voltage
WRT Quartzdyne Pres. (C) WRT Quartzdyne Temp. (C) WRT Quartzdyne Reference WRT Piston Swept Volume
WRT Section Status WRT Paine P. (G) 10000s
WRT Paine P. (G) 10s WRT Paine P. (G) 1000s Corr. Deep Conductivity
Corrected Deep Laterolog Corr. Micro Conductivity
Corr. Micro Laterolog Corr. Shallow Conduct. Corr. Shallow Laterolog
Bulk Modulus Closure Pressure Volume of Coal
Bulk Compressibility Differential Caliper Apparent Density
Data Edit Shade One Data Edit Shade Two
Invasion Depth Density Porosity Apparent Delta T Delta Pressure 1 Delta Pressure 2 Delta Pressure 3 Delta Pressure 4 Delta Pressure 5 Data Edit Curve
Estim. Poisson's Ratio Data Edit Curve Formation Factor
Gas Flag Fracture Extent 0
Formation Pressure Perforations
Closure Pressure Grad. Fracture Pressure Grad. Formation Temperature
Fracture Width 1 Fracture Width 2 Fracture Width 3 Fracture Width 4 Fracture Width 5 Shear Modulus Hydrogen Index Invasion Depth
Maximum Invasion Depth
Tool DescriptionCurve Description Tool
Wireline Release ToolWRT
AnalysisAnalysis
Curve Mnemonic
62 © 2007 Weatherford. All rights reserved.
Compact Curve Mnemonics™
Curve Mnemonic
LEDT NETP NETR NPHI PERM PHDN PHDS PHI1 PHI2 PHIA PHID PHIE PHIG PHIN PHIS PHIX PHSN POIR PORE RHOG
RO RTLC RTLL RWA
RXOC RXOL RXRT SATD SATP SGAS SHYC SOIL SPVF SSVF SW
SWWW SXO
VANH VCMB VDOL VGAS VHAL VHYC VLME VMA VOIL VOL1 VOL2 VOL3 VP14 VP15 VP20 VP25 VP30 VP40 VP60
Data Edit Curve Nett Pay
Nett Reservoir Neutron Porosity
Permeability Density/Neutron Porosity Density/Sonic Porosity
Primary Porosity Bad Hole Porosity
Apparent Neutron Por. Density Porosity Effective Porosity Gaymard Porosity Neutron Porosity Sonic Porosity
Crossplot Porosity Sonic/Neutron Porosity
Poisson's Ratio Pore Pressure
Apparent Matrix Density RO
Rt Conductivity Rt
Apparent Water Res. Rxo Conductivity
Rxo RXO/RT
Mean Saturation Depth Saturation Profile Saturation of Gas
Saturation Hydrocarbons Saturation of Oil
Delta T Compressional Delta T Shear
Saturation of Water Saturation of Water
Sat Mud Filtrate + Water Volume of Anhydrite
Vw + Voil Volume of Dolomite
Volume of Gas Volume of Halite
Volume of Hydrocarbons Volume of Limestone
Matrix Volume Volume of Oil
Phie + Vlime + Vsand Phie + Vsand Vsh + Vanhy
Enhanced Shallow Cond. VP15 VP20
Enhanced Medium Cond. VP30 VP40 VP60
Tool DescriptionCurve Description Tool
AnalysisAnalysis
63© 2007 Weatherford. All rights reserved.
™Compact Curve Mnemonics
Mnemonics Mnemonics Description Tool Tool DescriptionCurve Mnemonic
VP65 VP85 VPFE VRAT VSH
VSND VW VXO
WAV1 YMOD
Enhanced Deep Cond. VP85
Vivid Shallow FE Velocity Ratio
Volume of Shale Volume of Sandstone
Volume of Water Vol Mud Filtrate + Water
Invasion Profile Young's Modulus
Tool DescriptionCurve Description Tool
AnalysisAnalysis
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© 2007 Weatherford. All rights reserved. Document 4060.01
Weatherford products and services are subject to the Company’s standard terms and conditions, available on request or at www.weatherford.com. For more information contact an authorized Weatherford representative. Unless noted otherwise, trademarks and service marks herein are the property of Weatherford. Specifications are subject to change without notice. Weatherford sells its products and services in accordance with the terms and conditions set forth in the applicable contract between Weatherford and the client.
Log Interpretation Charts™Compact Tool Series