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
    • Schmidt Plots
  • 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