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E-110 - Borehole Seismic

5 days GEP/BORESEIS
Level
Proficiency
Audience
  • E&P geoscientists with no or weak experience in borehole seismic
Purpose
  • To provide a comprehensive understanding of borehole seismic: bridge between borehole and surface data
  • Ultimately, to improve knowledge of reservoir characteristics
Learning Objectives
  • To understand fundamental concepts of borehole seismic and different borehole seismic technologies
  • To follow or supervise design and operations of standard borehole seismic acquisition and/or processing
  • To ensure a reliable surface seismic calibration
Prerequisite
  • It is highly recommended to have a good knowledge of fundamentals in seismic wave propagation, acquisition and processing, as well as in structural geology
Ways and means
  • Interactive presentations, exercises, document analysis and videos

Introduction to borehole seismic
  • Role of Borehole Seismic
  • Fundamentals: seismic, rock physics and wave propagation
  • Borehole seismic and surface seismic
Borehole seismic acquisition
  • Equipment
  • Typical borehole seismic acquisition techniques
  • Preparation & supervision
  • Case studies and exercises
Borehole seismic processing
  • Surface seismic calibration: time vs. depth relationship
  • Synthetic seismogram
  • VSP processing principles: up & down wavefield separation, up wavefield demultiplying, corridor stack
  • Wavelet matching
  • Rules for surface seismic calibration
  • Case studies and exercises
Borehole seismic 2D and 3D imaging
  • 2D & 3D imaging: wavefield separation, demultiplying up wavefield, imaging
  • Case studies and exercises
Special products from borehole seismic
  • Surface seismic processing driven by borehole seismic
  • Fracture detection from microseismic
  • Pore pressure prediction
  • Calibration on time migrated seismic
  • Case studies and exercises
Borehole seismic applications and interpretation
  • Surface seismic calibration, imaging and prediction
  • Reservoir characterization
  • Monitoring
  • Case studies and exercises
Advanced features
  • Resolution enhancement: cross-well seismic
  • Permanent sensors, microseismicity
  • 4C / 3D / 4D surveys, SWD: Seismic While Drilling
  • Discussion and conclusions