|
Tool
|
Output
|
Description
|
Unit
|
|
EDTC
|
|
Enhanced Digital Telemetry Cartridge
|
|
|
|
GR
|
Total gamma ray
|
gAPI
|
|
|
ECGR
|
Environmentally corrected gamma ray
|
gAPI
|
|
|
EHGR
|
High-resolution environmentally corrected gamma ray
|
gAPI
|
|
HNGS
|
|
Hostile Environment Natural Gamma Ray Sonde
|
|
|
|
HSGR
|
Standard (total) gamma ray
|
gAPI
|
|
|
HCGR
|
Computed gamma ray (HSGR minus uranium contribution)
|
gAPI
|
|
|
HFK
|
Potassium
|
wt%
|
|
|
HTHO
|
Thorium
|
ppm
|
|
|
HURA
|
Uranium
|
ppm
|
|
APS
|
|
Accelerator Porosity Sonde
|
|
|
|
APLC
|
Near/array limestone corrected porosity
|
Dec. fraction
|
|
|
STOF
|
Computed standoff
|
inch
|
|
|
SIGF
|
Formation capture cross section
|
Capture units
|
|
HLDS
|
|
Hostile Environment Litho-Density Sonde
|
|
|
|
RHOM
|
Bulk density
|
g/cm3
|
|
|
PEFL
|
Photoelectric effect
|
barn/e–
|
|
|
LCAL
|
Caliper (measure of borehole diameter)
|
inch
|
|
|
DRH
|
Bulk density correction
|
g/cm3
|
|
HRLA
|
|
High-Resolution Laterolog Array
|
|
|
|
RLAXXX
|
Apparent resistivity from Computed Focusing Mode XXX
|
Ωm
|
|
|
RT
|
True resistivity
|
Ωm
|
|
|
MRES
|
Borehole fluid resistivity
|
Ωm
|
|
MSS
|
|
Magnetic Susceptibility Sonde
|
|
|
|
LSUS
|
Magnetic susceptibility, deep reading (DR)
|
Uncalibrated units
|
|
|
HSUS
|
Magnetic susceptibility, high resolution (HR)
|
Uncalibrated units
|
|
FMS
|
|
Formation MicroScanner
|
|
|
|
C1, C2
|
Orthogonal hole diameters
|
inch
|
|
|
P1AZ
|
Pad 1 azimuth
|
°
|
|
|
|
Spatially oriented resistivity images of borehole wall
|
|
|
GPIT
|
|
General Purpose Inclinometry Tool
|
|
|
|
DEVI
|
Hole deviation
|
°
|
|
|
HAZI
|
Hole azimuth
|
°
|
|
|
Fx, Fy, Fz
|
Earth's magnetic field (three orthogonal components)
|
°
|
|
|
Ax, Ay, Az
|
Acceleration (three orthogonal components)
|
m/s2
|
|
DSI
|
|
Dipole Shear Sonic Imager
|
|
|
|
DTCO
|
Compressional wave slowness
|
µs/ft
|
|
|
DTSM
|
Shear wave slowness
|
µs/ft |
|
|
DT1
|
Shear wave slowness, lower dipole
|
µs/ft |
|
|
DT2
|
Shear wave slowness, upper dipole
|
µs/ft |
|
VSI
|
|
Versatile Seismic Imager
|
|
|
|
1WTT
|
Acoustic traveltime
|
s
|
|
DIT
|
|
Phasor Dual Induction–Spherically Focused Resistivity Tool
|
|
|
|
IDPH
|
Deep induction resistivity
|
Ωm
|
|
|
IMPH
|
Medium induction resistivity
|
Ωm
|
|
|
SFLU
|
Shallow spherically focused resistivity
|
Ωm
|
For the complete list of acronyms used in IODP and for additional information about tools, consult IODP-USIO Science Services, LDEO, at iodp.ldeo.columbia.edu/TOOLS_LABS/tools.html.