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Table T5. Measurement performance specification of the wireline logging tools. (See table notes.)
|
Tool string
|
Tool |
Measurements |
Sampling
interval
(cm) |
Vertical
resolution
(cm) |
Depth of
investigation
(cm) |
Logging
speed
(m/h) |
|
PEX-HRLA-EMS-GR
|
HGNS |
Natural gamma ray |
|
31.0 |
~61.00 |
1097 |
|
HGNS
|
Neutron porosity |
|
31.0 |
~23.00 |
|
|
HRMS |
Bulk density, PEF, caliper |
|
45.7 (6 inch hole) |
12.70 |
|
|
MCFL |
Microresistivity |
|
1.8 |
7.62 |
|
|
HRLA |
Laterolog resistivity |
5.00 |
31.0 |
127.00 |
|
|
EMS |
Caliper, mud temperature-resistivity |
|
15.0 |
|
|
|
GR |
Gamma ray |
|
31.0 |
24.00 |
|
|
FMI-Sonic Scanner-HNGS
|
FMI |
Microresistivity |
0.25 |
0.5 |
2.50 |
305 |
|
GPIT |
Acceleration |
|
15.2 |
|
|
|
Sonic Scanner |
Compressional and shear slowness, full waveforms |
|
<1.82 m (15.24 cm sampling rate) |
~7 borehole radii |
|
|
HNGS |
Spectral gamma ray
(corrected gamma ray of uranium; potassium, thorium, and uranium curves) |
15.00 |
20.3–30.5 |
24.00 |
|
Notes: PEX = Platform Express, HRLA = High-Resolution Laterolog Array, EMS = Environmental Measurement Sonde, GR = Gamma Ray, HGNS = Highly Integrated Gamma Ray Neutron Sonde, HRMS = High-Resolution Mechanical Sonde, MCFL = Micro-Cylindrically Focused Log. FMI = Formation MicroImager, HNGS = Hostile Environment Natural Gamma Ray Sonde, GPIT = General Purpose Inclinometry Tool. PEF = photoelectric effect.
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