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E-153 - Seismic Reflection Fundamentals

5 days GEO/SEISREF
Level
Foundation
Audience
  • E&P professionals with no or limited experience in seismic.
Purpose
  • This course provides a thorough understanding of seismic reflection and usual applications.
  • It aims at acquiring fundamental concepts in subsurface imaging for geological interpretation purposes.
Learning Objectives
  • Upon completion of the course, participants will be able to:
  • assess main steps of the seismic reflection workflow, from acquisition to interpretation,
  • understand fundamentals of seismic wave propagation with relation to petrophysical properties of subsurface,
  • grasp methodology of surface and borehole seismic acquisition, processing and interpretation.
Prerequisite
  • No prerequisites for this course.
Ways and means
  • Interactive presentations, exercises, hands-on, document analysis and videos.

Seismic waves propagation & signal processing 1 day
  • Seismic waves, rock velocities and densities, Snell-Descartes laws.
  • Reflection coefficients, acoustic impedance.
  • Seismic reflection principle - Seismic shot gathers.
  • Seismic signal vs Seismic noises – Time domain vs Frequency domain.
  • Time and space sampling.
Seismic acquisition 0.5 day
  • 2D and 3D seismic, land, marine, sea bottom seismic.
  • Seismic sources (explosive, vibroseis, air guns, …).
  • Seismic receivers (geophones, MEMS, hydrophones, …).
  • Streamer, OBC, nodes, shallow water, transition zone, …
Seismic processing & imaging 0.5 day
  • Seismic processing workflows, post-stack versus pre-stack.
  • Enhance signal versus noise.
  • CMP/Bin, Static corrections, dynamic corrections, velocity analysis.
  • Stack, post-stack migrations, pre-stack migrations (PSTM – PSDM).
Borehole seismic 0.5 day
  • Theory and principles, synthetic seismogram and well-to-seismic tying.
  • Vertical Seismic Profile (VSP), Offset Seismic Profile (OSP), walkaway.
  • Seismic While Drilling (SWD).
  • Examples and applications.
Seismic interpretation 2 days
  • Principles and methodology, seismic interpretation pitfalls.
  • Hands-on: 2D seismic interpretation (on paper).
Seismic for reservoir analysis 0.5 day
  • Seismic amplitudes analysis, direct hydrocarbon indicators (DHI), seismic attributes analysis.
  • HR – HQ – HD – Broadband seismic, 4D seismic.
  • Multi-component seismic, P waves vs S waves.
  • AVO-AVA processing and analysis, seismic inversion.
Summary, synthesis & wrap-up