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Basic Seismic Interpretation

Estimated Time to Complete:

5 hours

(average of 60 minutes per Subtopic)

Introduces seismic data interpretation. Lists the four basic steps in structural seismic interpretation. Identifies where to pick the horizon on the seismic waveform and why. Explains why migration changes the reflection times on dip lines, but does not change them on strike lines. Recognizes the location of favorable traps for hydrocarbon accumulations. Explains the timing and the depositional mechanics of faulting and how this impacts oil and gas migration. States the different types of seismic effects that can be misleading during interpretation. Explains the concept of sequences; intervals within which the sediments are genetically related. Describes how the amplitude, polarity, and shape of the seismic signal are important to understanding the geological lateral variations of the subsurface. Differentiates between bright spots, flat spots and dim spots on seismic sections, and explains what causes these direct hydrocarbon indicators. Outlines how crosswell seismology provides high density, depth-calibrated seismic data between two wellbores. Describes how and where seismic attributes are applied.

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Total Number of Subtopics: 5
  • expand/collapse Introduction to Seismic Interpretation
    • Introduction
    • Process of Seismic Interpretation
    • Where to Pick
    • Where to Time
    • Migrated and Unmigrated Sections and Line Ties
  • expand/collapse Structural Interpretation
    • Introduction
    • Faults and Sedimentary Accumulations
    • Timing of Structural Movements
  • expand/collapse Seismic Stratigraphy
    • Introduction
    • Sedimentary Layers
    • Unconformities
    • Erosional Channels
    • Mound Deposits and Reefs
    • Reef Interpretation
    • Absence of Reflections
  • expand/collapse Seismic Interpretation Methods
    • Seismic Modeling Introduction
    • Bright, Flat and Dim Spots
    • Crosswell Seismic
  • expand/collapse Interpretation with Seismic Attributes
    • Introduction
    • 2D and 3D AVO Attributes
    • The Coherence Attribute
    • Instantaneous Attributes
    • Attribute Applications
(Use the '+' and '-' buttons to expand or collapse each Subtopic Title individually for details.)