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
- Magnetic
- 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