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Choosing the Field Variables

Estimated Time to Complete:

4 hours

(average of 20 minutes per Subtopic)

Analyzes the exploration problem, the proper design of field programs, and the importance of the frequency variable. Demonstrates how other variables depend on frequency and on each other. Illustrates how to optimize field work.

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Total Number of Subtopics: 12
  • expand/collapse Introduction and Basic Concepts
    • Scope
    • Defining the Exploration Problem
    • Defining the Geophysical Problem
    • Vertical Resolution
    • Improving the Resolution
    • Deconvolution and Signal Noise Bandwidth
    • Lateral Resolution
  • expand/collapse Judgements From the Field Data
    • Historical Data
    • Judgements from Field Data
    • Benefits From Processing
  • expand/collapse Field Variables
    • Reasoned Progression for Choosing Field Variables
  • expand/collapse Experimental Shooting
    • Are Field Experiments Necessary?
    • Test Methods
  • expand/collapse Criteria for Choosing Field Variables
    • Sampling
    • Ranges
    • Receiver Arrays
    • The Source
    • Relation of Source Points to Geophone Stations
    • 3-D Geometries
  • expand/collapse The Land Impulsive Source
    • The Land Source
    • Source Variables
    • Source Effort
  • expand/collapse The Vibroseis Source
    • Vibroseis Overview
    • The Linear Sweep
    • The Nonlinear Sweep
    • Whitening the Spectrum Through Nonlinear Sweeps
    • Signal-to-Noise Considerations
    • Nonlinear Sweep Conclusions
    • Vibroseis Techniques
    • Procedure for Designing a Vibroseis Survey
  • expand/collapse Receivers and Recording Systems
    • Receiver Overview
    • Recording Systems
  • expand/collapse Marine and Transition Zone Surveys
    • Differences Between Marine and Land Surveys
    • Sources
    • Streamers
    • Ship Speed and the Stack Array
    • Considerations for Transition-Zone Surveys
  • expand/collapse Conclusions
    • Economic Considerations
    • Factors Affecting the Seismic Program
    • Conclusion
  • expand/collapse Choosing the Field Variables: References and Additional Information
    • References
    • Additional Reading
  • expand/collapse Choosing the Field Variables: Exercises
    • About this Course
    • Exercise 1 (Solution)
    • Exercise 2 (Solution)
    • Exercise 3 (Solution)
    • Exercise 4 (Solution)
    • Exercise 5 (Solution)
    • Exercise 6 (Solution)
    • Exercise 7 (Solution)
    • Exercise 8 (Solution)
    • Exercise 9 (Solution)
    • Exercise 10 (Solution)
    • Exercise 11 (Solution)
    • Exercise 12 (Solution)
    • Exercise 13 (Solution)
    • Exercise 14 (Solution)
    • Exercise 15 (Solution)
    • Exercise 16 (Solution)
    • Exercise 17 (Solution)
    • Exercise 18 (Solution)
    • Exercise 19 (Solution)
(Use the '+' and '-' buttons to expand or collapse each Subtopic Title individually for details.)