Geophysical Logging Suites

Geophysical Logging Suites

Key Benefits

Geophysical logging suites offer a wide range of benefits, including all of the following:

  • Defining subsurface lithologic stratigraphy
  • Aid in water well construction
  • Correlate with existing data
  • A permanent record of the borehole

Capabilities

  • With the addition of a specific geophysical logging suite to a water or mineral exploration boring or production well, the geologist or hydrologist can more confidently pick the most productive zones with greater ease.
  • Five operational truck units to serve the southwestern U.S.
  • Portable geophysical logging units utilized to travel locally in 4WD vehicles to helicopters or shipment to travel overseas to satisfy most needs.
  • Increasing staff load to cover those log jobs logging the hole safely.
  • Geophysical logging engineers that can design basic and advanced logging suites for your specific needs.
  • State-of-the-art logging suites for high resolution detail and flow profiling.
  • Geophysical logging tools range in diameter from 1 1/8 to 2 1/2 inches to depths of 10,000+ feet (or 3,000 psi).

Basic log–70 C ratings as well as 85 C ratings

  • Electrical Logs
    • 16″ Normal Resistivity (Ohm/m)
    • 64″ Normal Resistivity (Ohm/m)
    • Single Point Resistivity or SPR (Ohms)
    • Spontaneous Potential or SP (mV)
  • Guard Resistivity (Ohm-m)
  • Dual Guard Resistivity (Ohm-m)
  • Natural Gamma (API)
  • Caliper
    • 1-Arm Caliper (Inches)
    • 3-Arm Caliper (Inches)
    • 4-Arm Caliper (Inches)
  • Temperature
    • Temperature (Deg F or C) (0 C to 135C)
    • Delta Temperature (Deg F or C)
  • Induction Resistivity
    • Dual Induction and calculated resistivity measurements in wet and dry ground.
  • Deviation – Directional survey tools used to determine the following hole parameters.
    • Magnetic
      • Inclination
      • Bearing
      • Calculated
        • True Total Vertical Depth or TVD
        • Drift distances (east-west and north-south)
        • Dog-Leg Severity
        • Closure Distance
        • Closure Angle
    • Gyroscopic – SRG and North Seeking
      • Inclination
      • Bearing
      • Calculated
        • True Total Vertical Depth or TVD
        • Dog-Leg Severity
        • Drift distances (east-west and north-south)
        • Closure Distance
        • Closure Angle
  • Depth Specific Fluid Samples
    • 1.4 liters
    • 2.5 liters
    • 3.0 liters capacity

Advanced logs–Radioactive

  • Neutron (API) Am Be 241
  • Density – (g/cc) Cs 137 for bond logging
  • Compensated Density – (g/cc) Cs 137 for rock/soil density properties
  • 4-Pi Density – (lbs/cuft) Cs 137 for pier and bond log evaluations

Sonic – Multi-receiver (2,3,4 Rx) Rock /Soil Properties

  • 2, 3 and 4 Receiver units
  • Travel Time
  • Transit Time or Delta T
  • P-Wave Amplitude
  • Tube Wave Amplitude (Fluid Wave)
  • Variable Density Log or VDL
  • Multi-frequency logging from 1kHz to 30 kHZ
  • Shear Wave Analysis
  • Semblance

Water well Production logging

  • Spinner or (Production logs)
    • Impellers: 1.5”, 1.75”, 2.5” and 2.75”
  • Fluid Temperature and Fluid Resistivity

Advanced geophysical logging technique–Structural Evaluations

  • Acoustic Televiewer or ATV
  • Acoustic Borehole Imagining or ABI [ABI-40 and ABI-43 (High Temp)]
    • Amplitude
    • Transit Time
    • Fracture display Sinusoids
    • Amplitude
    • Transit Time
    • Fracture display Sinusoids
    • 3-Dimential View display
    • Deviation
  • Optical Televiewer/OTV or OBI-40
    • Optical Image display
    • Fracture display
    • Deviation
    • 3-Dimensional View Display
  • ABI Full Waveform Acoustic Televiewer
    • Casing Thickness /Integrity Measurement
    • Imaging of hard rock structure behind PVC
  • Heat-Pulse Flow meter
    • Low flow regime logging (<1 gal/min)
    • Modeling of possible contaminant flow through fractured bedrock
  • Spectral Gamma Log
    • Energy Spectrum Plots
    • Spectrum Concentrations
    • Determine Clay Mineral Types
  • IP or Induced Polarization
    • Mineralized zone determinations

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