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E-243C - Seismic Reservoir Characterization: AVO & Inversion Workshop Certification

10 days GRE/SEISMIC
Level
Advanced
Audience
  • Experienced geoscientists and reservoir engineers involved in multidisciplinary teams, willing to widen their knowledge in seismic reservoir characterization. Basics of structural interpretation are required
Purpose
  • To grasp the basics of seismic reservoir characterization focusing on Amplitudes, using both qualitative and quantitative methods. To be able to understand and follow every step of seismic reservoir characterization projects
Learning Objectives
  • To be able to understand a seismic reservoir characterization study project
  • To be able to work in a seismic reservoir characterization study project at basic level
  • To perform a feasibility study and to select the most appropriate workflow
  • To gather and prepare data for seismic interpretation studies
Ways and means
  • Interactive presentations, practical exercises, documents analysis
  • Workshop on case study using dedicated software

Week 1
Qualitative interpretation: seismic stratigraphy and attributes 2 days
  • Stratigraphic hydrocarbon traps
  • Well-to-seismic calibration
  • Seismic Amplitude Interpretation
  • Seismic Resolution
  • Seismic Attributes for Stratigraphic interpretation
  • DHI analysis: Bright or Dim spot
  • From basin estimation to reservoir characterization
  • Weekly test
  • Correction and conclusions
Workshop 3 days
  • Case study presentation – Hands-on objectives
  • Interpretation of sedimentary bodies
  • Unconformity and angularity, sequence identification and picking
  • Top and base picking of sedimentary sequence in the Tertiary group
  • Interpretation of prograding sub-sequences using seismic facies analysis (amplitude, energy, phase, etc.)
  • Other structures’ evidence through structural attributes analysis
  • Channels delineation and interpretation using structural attributes
  • Other structural elements
  • Seismic evidence of a reservoir – Detection and analysis
  • Amplitude and seismic attributes anomalies analysis at sequence top (DHI, gas shadows, etc.)
  • Analysis of seismic character modification in the vicinity of the reservoir (reflectivity, phase or frequency changes, multiples enhancement, structural anomalies, etc.)
  • Seismic attributes analysis and characterization
  • Analysis of seismic inversion and porosity attributes in potential traps
  • Attribute comparison in potential trap areas, seismic facies analysis and characterization
  • Participants’ results presentation
  • Feedback and wrap-up
Week 2
Quantitative interpretation: inversion and AVO 2 days
  • Fundamentals of rock physics
  • Wavelets
  • Log time-to-depth conversion and resampling. Aliasing
  • Acoustic impedances and seismic inversion
  • AVO principles and Interpretation
  • Well data and seismic data preconditioning for seismic characterization
  • Quantitative reservoir property prediction: lithologies and fluids
  • Weekly test
  • Correction and conclusions
Workshop 3 days
  • Case study presentation – Hands-on objectives
  • Log time-to-depth conversion and resampling
  • Wavelet generation
  • Acoustic impedances and synthetic trace generation
  • Synthetic AVO case (amplitude vs offset)
  • AVO modeling - 4 classes
  • AVO interpretation
  • DHI interpretation (bright spot) – Fluid content determination
  • Participants’ results presentation
  • Feedback and wrap-up