enhanced co
TRANSCRIPT
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerIntroduction of Advanced Carbon-Oxygen Logging
Key Features of RSTPro• New Spectral Standards
• Full Spectrum Calibrations
• Expanded Database
• Smoother Database Interpolation/Extrapolation
• High Precision Mode for Field Monitoring
• Detector Resolution Compensation for Windows Measurements
• New GeoFrame Based Processing (No more INCRES)
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerEnhanced C/O Spectral StandardsEnhanced C/O Spectral Standards
0 1 2 3 4 5 6 7 8
Cou
nts
(Arb
itrar
y of
fset
s)
Energy (MeV)
O
Tool
Si
Ca
Mg
S
C
Fe
RSTA Far InelasticStandard Spectra
•Two Additional Inelastic Standards Mg & S•More Accurate Tool Background•Improved Technique for Removing Capture Background•Reduced Positive Biases in Low Porosity.
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerFan Chart Interpretation
0 20 40 600
0.2
0.4
0.6
0.8
1
Porosity (p.u.)
FC
OR
Lime, 6−in. BH, 4.5−in. / 10.5 lbm/ft Csg
Water in BH
Oil in BH
Database
0 20 40 600
0.2
0.4
0.6
0.8
1
Porosity (p.u.)
FC
OR
Lime, 6−in. BH, 4.5−in. / 10.5 lbm/ft Csg
Water in BH
Oil in BH
Database
C/O Fan Chart for Former Standards C/O Fan Chart for New Standards
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerC/O Response for Old and New Standards
10 15 20 25 30 35 40−0.05
0
0.05
0.1
0.15
0.2C/O Responses: Old & New Standards
Porosity (p.u.)
C/O
Rat
io (f
rom
spe
ctra
l yie
lds)
Drained Oil−Sands
Dry−Sand (Old)
Dry−Sand (New)
Water−Sands
Oil−Sands
New
Old
New
Old
Old
New
Water−Sands (Old Stds)Oil−Sands (Old Stds)Drained Oil−Sands (Old Stds)Dry−Sand (Old Stds)Water−Sands (New Stds)Oil−Sands (New Stds)Drained Oil−Sands (New Stds)Dry−Sand (New Stds)
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerFull Spectrum Calibration Function
60 80 100 120 140 160 180 200 2200.9
0.95
1
1.05
1.1
1.15Sample RST Spectral Calibration Function
Energy (channel number)
Spec
tral C
alib
ratio
n Fu
nctio
n
Formation 1Formation 2Formation 3Formation 4Formation 5Formation 6Formation 7Formation 8Water−Tank
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerDatabase Measurements1 .6 8 7 5 -in . C h a r a c te r iz a tio n s 1
Hol
e Si
ze(in
.)
Casi
ng S
ize2
(in.)
Cas
ing
Wei
ght
(lbm
/ft)
Lim
esto
ne F
orm
atio
nPo
rosi
ties3
Sand
ston
e Fo
rmat
ion
Poro
sitie
s3
Form
atio
nFl
uid4
Bore
hole
Flui
d4
4 .1 2 5 O H n /a Z M H Z M H W O W O2 .8 7 5 6 .4 Z M H Z M H W O W O
3 .5 1 2 .7 Z M H Z M H W O W O6 O H n /a Z M H Z M H W O W O
2 .8 7 5 8 .6 Z M H Z M H W O W O4 .5 1 0 .5 Z M H Z M H W O W O5 1 1 .5 Z M H Z M H W O W O5 1 8 Z M H Z M H W O W O
8 O H n /a Z n /a W O5 .5 2 3 Z n /a W O6 1 8 Z n /a W O7 3 2 Z n /a W O
8 .5 O H n /a Z M H M H W O W O5 2 3 .2 M H W O W O
6 .6 2 5 2 0 Z M H M H W O W O7 2 3 Z M H M H W O W O7 3 2 Z M H M H W O W O
1 0 O H n /a Z M H Z W O W O7 2 3 Z M H Z M H W O W O7 3 2 Z M H Z M H W O W O
7 .6 2 5 2 6 .4 Z M H Z M H W O W O7 .6 2 5 3 3 .7 Z M H W O W O
1 2 8 .6 2 5 3 6 Z M H M H W O W O9 .6 2 5 3 2 .3 Z M H M H W O W O9 .6 2 5 5 3 .5 Z M H M H W O W O
1 S h a d in g in d ic a te s n e w d a ta b a s e m e a s u re m e n t.2 O H = O p e n H o le3 Z = Z e ro (0 p .u .),
M = M e d iu m (1 5 to 2 0 p .u .),H = H ig h (~ 3 3 p .u . fo r s a n d , 3 8 to 4 3 p .u . fo r lim e )
4 W = F re s h W a te rO = # 2 D ie s e l F u e l T a b le 2
2 .5 - in . C h a r a c t e r i z a t io n s 1
Hol
e Si
ze(in
.)
Casi
ng S
ize2
(in.)
Cas
ing
Wei
ght
(lbm
/ft)
Lim
esto
ne F
orm
atio
nPo
rosi
ties3
Sand
ston
e Fo
rmat
ion
Poro
sitie
s3
Form
atio
nFl
uid4
Bor
ehol
eFl
uid4
4 .1 2 5 O H n /a Z M H M H W O W O3 .5 1 2 .7 Z M H M H W O W O
6 O H - Z M H M H W O W O4 .5 1 0 .5 Z M H M H W O W O
5 1 1 .5 Z M H M H W O W O5 1 8 Z M H M H W O W O
8 .5 O H n /a Z M H M H W O W O5 1 8 M H W O W O5 2 3 .2 M H W O W O
6 .6 2 5 2 0 Z M H M H W O W O7 2 3 Z M H M H W O W O7 3 2 Z M H M H W O W O
1 0 O H n /a Z M H M H W O W O7 2 3 Z M H M H W O W O7 3 2 Z M H M H W O W O
7 .6 2 5 2 6 .4 Z M H M H W O W O7 .6 2 5 3 3 .7 M H W O W O
1 2 O H n /a M H W O W O8 .6 2 5 3 6 Z M H M H W O W O9 .6 2 5 3 2 .3 Z M H M H W O W O9 .6 2 5 4 3 .5 M H M H W O W O9 .6 2 5 5 3 .5 Z M H M H W O W O
1 0 3 3 M H W O W O1 S h a d in g in d ic a te s n e w d a ta b a s e m e a s u re m e n t .2 O H = O p e n H o le3 Z = Z e ro (0 p .u . ) ,
M = M e d iu m (1 5 to 2 0 p .u . ) ,H = H ig h (~ 3 3 p .u . f o r s a n d , 3 8 to 4 3 p .u . fo r l im e )
4 W = F re s h W a te rO = # 2 D ie s e l F u e l
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerTool Accuracy
C/O MethodTool“A”(s.u.)
Tool“B”(s.u.)
Tool“C”(s.u.)
Tool“D”(s.u.)
Tool“E”(s.u.)
Tool“F”
(s.u.)
Tool“G”(s.u.)
Avg AbsError vs
ENP1 (s.u.)
Reductionin Error vs
ENP1
Far Yields (RST) 12.3 9.0 15.2 21.5 8.6 -9.1 -3.4 10.00Far Yields (RSTPro) -1.3 -2.7 -2.0 1.9 1.2 -1.9 -1.1 1.46 85.4 %Far Windows (RST) 14.4 7.9 10.2 20.8 12.5 -5.9 5.3 10.16Far Windows (RSTPro) 2.3 -1.3 -0.6 4.7 1.9 -1.1 0.6 1.63 83.7 %Near Yields (RST) 4.2 -5.6 6.6 16.0 6.2 12.3 13.5 7.44Near Yields (RSTPro) -0.9 -7.5 1.5 7.1 5.4 -1.3 8.8 4.46 55.4 %Near Windows (RST) - 18.5 8.2 19.1 -2.4 -7.8 -5.1 9.06Near Windows(RSTPro) -3.1 3.5 -4.1 -0.8 -3.3 -6.5 -3.8 2.66 73.4 %
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerGas Response
C/O Bias in Gas Zones With and Without Gas Correction Logic
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerImprovement in Accuracy and Precision
Improved Precision ofIdentical Passes usingLogos (RST) Processingand Enhanced C/O (RSTPro)
Enhanced C/O RSTPro Interpretation School 1999
Schlumberger
Tool 34 Calibrations
0.90
0.95
1.00
1.05
1.10
1 11 21 31 41 51 61 71 81 91 101
111
121
131
141
151
161
171
181
191
201
211
221
231
241
251
Channel
Gai
n
1996 Inelastic1996 Capture1997 Inelastic1997 Capture1998 Inelastic1998 CaptureSeries7Water Tank
Calibration Stability
Enhanced C/O RSTPro Interpretation School 1999
Schlumberger5 Pass Tool Precision with Standard Processing
5 Repeat Passes Logged at100 ft/hr.
9 7/8” Bit Size7” 29# Casing
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerCore Vs Core Repeatability
Enhanced C/O RSTPro Interpretation School 1999
Schlumberger5 Pass Repeatability with Recycled Alpha
5 Passes Using the Same Toolwith Recycled Alpha.
Enhanced C/O RSTPro Interpretation School 1999
Schlumberger5 Passes 5 Tools
Repeatability Test Using5 Different Tools.
Enhanced C/O RSTPro Interpretation School 1999
Schlumberger4 Passes 4 Tools
Repeatability Test Using4 Different Tools withStandard Processing.
Enhanced C/O RSTPro Interpretation School 1999
Schlumberger4 Tools Calibrated Results
4 Tools Processed UsingEnhanced C/O techniques
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerReservoir Monitoring
Oil Saturation Over
5 Years Vs Original
Core Oil Saturation
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerC/O Derived Oil Saturation in the Kern River Field
Enhanced C/O RSTPro Interpretation School 1999
SchlumbergerConclusion
RSTPro is a new generation C/O logging tool capable ofmaking accurate and precise measurements in a wide varietyof environments
The number of database points for the RSTPro tool is nearly double the number of points available for the RST
RSTPro makes use of the first full spectrum calibration forany tool in the industry resulting in an 85% improvement inaccuracy over the RST
Accuracy comparable to Coring…….