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Required Well Conditions In Interval To Be Logged
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Technique
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Casing
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Contents
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Information Beyond Casing, If Present ?
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Natural Gamma (ng)
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None, Steel or PVC - Solid or Screen
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Air or Water - Clear or Turbid
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Yes
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Short Normal Resistivity
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None or PVC Screen
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Clear or Turbid Water
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Yes
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Long Normal Resistivity
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None or PVC Screen
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Clear or Turbid Water
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Yes
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Single Point Resistance (SPR)
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None or PVC Screen
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Clear or Turbid Water
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Yes
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Spontaneous Potential (SP)
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None or PVC Screen
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Clear or Turbid Water
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Yes
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Magnetic Susceptibility
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None, or PVC - Screen or Solid
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Air or Water - Clear or Turbid
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Yes
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Magnetic Field Vector
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None, or PVC - Screen or Solid
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Air or Water - Clear or Turbid
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Yes
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Caliper
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None, Steel or PVC - Solid or Screen
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Air or Water - Clear or Turbid
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No
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Fluid Temperature
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None, Steel or PVC - Solid or Screen
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Clear or Turbid Water - Fully Equilibrated
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No
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Fluid Conductivity
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None, Steel or PVC - Solid or Screen
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Clear or Turbid Water - Fully Equilibrated
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No
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Electromagnetic Induction (Formation Conductivity)
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None, or PVC - Screen or Solid
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Air or Water - Clear or Turbid
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Yes
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Verticality
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None, or PVC - Screen or Solid
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Air or Water - Clear or Turbid
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No
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Full Waveform Sonic
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None
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Clear or Turbid Water
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Yes
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Digital Video
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None, Steel or PVC - Solid or Screen
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Air or Clear Water
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No
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Borehole Acoustic Televiewer (BHTV)
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None, Steel or PVC - Solid or Screen
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Clear or Turbid Water
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No
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Borehole Optical Televiewer (OPTV)
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None, Steel or PVC - Solid or Screen
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Air or Clear Water
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No
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Heat Pulse Flowmeter
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None, Steel or PVC - Solid or Screen
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Clear or Turbid Water - Slow Moving
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No
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Impeller Flowmeter
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None, Steel or PVC - Solid or Screen
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Clear or Turbid Water - Fast Moving
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No
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Induced Polarization (IP)
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None or PVC Screen
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Clear or Turbid Water
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Yes
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Borehole Gravity
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None, Steel or PVC - Solid or Screen
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Air or Water - Clear or Turbid
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Yes
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Gamma Density (g-g)
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None, Steel or PVC - Solid or Screen
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Air or Water - Clear or Turbid
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Yes
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Neutron Density
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None, Steel or PVC - Solid or Screen
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Air or Water - Clear or Turbid
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Yes
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pH
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None, Steel or PVC - Solid or Screen
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Clear or Turbid Water - Fully Equilibrated
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No
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Dissolved Oxygen (O2)
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None, Steel or PVC - Solid or Screen
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Clear or Turbid Water - Fully Equilibrated
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No
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Cavity Sonar
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None
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Clear or Turbid Water
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No
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Cavity Ultrasound
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None
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Air
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No
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