Government Links

• Live Internet Seismic Server (USGS)
• National Geological and Geophysical Data Preservation Program
• Notice of Intent and Authorization to Conduct O & G Geophysical Exploration Operation (U.S.)
  

Geophysics General Information

• Earth's interior
  
• Major Tectonic Plates
  
• Mean Sea Level, GPS, and the Geoid
  
• Mohr's Circle for Plane Stress
  
• Physical Constants
  
• Physical Properties of The Earth
  
• Seismic Refraction Interpretation With Velocity Gradient And Depth of Investigation
  
• Seismic Waves and Earth's Interior
  
• Structure of the Earth (Wikipedia)
  
• World Magnetic Model
  

Application of Geophysical Methods

• Surface Methods
  • Electrical Resistivity Surveys
    • DC Resistivity Technique
      
    • Electrical Resistance Survey
      
    • Using tensorial electrical resistivity survey to locate fault systems
      
  • Electromagnetic Induction (EM)
    • Electromagnetic Induction Explained
      
    • Electromagnetic induction (Wikipedia)
      
    • Use of a Electromagnetic Induction Techique in Subsurface Hydrocarbon Investigations
      
  • Ground-Penetrating Radar
    • Ground-Penetrating Radar
      
    • Ground-Penetrating Radar usage And Limitations
      
  • Magnetometry (MAG)
    • Magnetic Measurements
      
    • Magnetometry
      
  • Reflection and Refraction
    • Reflection Seismology (Wikipedia)
      
    • Seismic Refraction Profiling
      
    • Seismic Refraction Method For Road Survey
      
    • Seismic Refraction vs Seismic Reflection
      
    • Seismic Techniques
      

• Downhole Methods
  • General Information
    • Downhole Methods General
      
    • Electric Logs
      
    • Electrical Well Logging
      
    • Geophysical Logging (USGS)
      
    • Geophysical Well Log Interpretation
      
  • Caliper Logging
    • Caliper Logging Overview
      
    • Caliper Probe
      
  • Cement Bond Logging
    • Cement Bond Log Interpretation Models
      
    • Cement Bond Log Interpretation Reliability
      
    • Cement Bond Log MIT?
      
  • EM Induction Logging
    • Electromagnetic-Induction Log (USGS)
      
    • Exploring Oil Fields with Crosshole EM
      
    • Method and Apparatus for Gradient Electromagnetic Induction Well Logging
      
  • Formation Density Logging
    • Density logging (Wikipedia)
      
    • Density Logs
      
    • Formation Density Log
      
  • Imaging Downhole
    • International Downhole Imaging Society (IDIS)
      
    • Looking Downhole
      
    • Reservoir Imaging
      
  • Natural Gamma Logging
    • Borehole Geophysics and Petrophysics Natural gamma logging
      
    • Core-Log Integration of Natural Gamma Ray Intensity
      
    • Hydrologic Interpretations of Natural Gamma Logs for Memphis, Tennessee Area (USGS)
      
    • Spectral Gamma Logging
      
  • Nuclear Magnetic Resonance (NMR) Logging
    • Example of NMR Log
      
    • NMR Advancing Toward Simplicity (AAPG)
      
    • NMR Log Evaluation of Low Resistivity Sandstone Reservoirs By-Passed by Conventional Logging
      
  • Neutron Logging
    • CNL Compensated Neutron Log
      
    • Neutron Log
      
    • Neutron Log and Coal Cherokee Basin - Southeastern Kansas
      
  • Resistivity Logging
    • Dual Laterolog (DLL)
      
    • Resistivity Log
      
    • Resistivity logging (Wikipedia)
      
  • Sonic Logging
    • Crosshole Sonic Logging
      
    • Sonic Log Ties Seismic to 'Ground Truth' (AAPG)
      
    • Sonic Logging (Wikipedia)
      
  • Spontaneous Potential (SP) Logging
    • Spontaneous Potential Log
      
    • Spontaneous Potential Logging (Wikipedia)
      
  • Temperature Logging
    • Application of Temperature and Conductivity Logging in Ground Water
      
    • Temperature Logging Overview
      
  • TracerScan Surveys
    • Hydraulic Fracture Height in Cased Wells
      
    • Spectroscopy Technique For Determining The Distribution Of Multiplte Radioactive Tracers In Downhole Operations
      
    • Tracers Bibliography
      

Seismic

General Information

• Overview of Seismic Exploration
  
• Inverse Scattering Series and Seismic Exploration
  
• Seismic Best Management Practices
  
• Seismic Technology (SPE)
  

Seismic Interpretation

• Seismic Interpretation Exercise (SEPM)
  
• Seismic Interpretation (USGS)
  
• How to Interpret Leakage Zones on Seismic Data
  

2D Seismic

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3D Seismic

• 3D Seismic Technology: Application to the Exploration of Sedimentary Basins ("Free" Download)
  
• From 2D to 3D
  
• Interpretation of Incised Valleys Using New 3D Seismic Techniques
  
• Value of 3D Seismic vs 2D Seismic