April 21 - 23, 2020

RokDoc SDC & Inversion - 3 Days Course

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Course Outline:

Attendees learn to operate the software by applying it to practical examples; this is supplemented by presentations of the underlying principles and by discussion of the results obtained, with emphasis on QC methods.
Course Location
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Well-ties and Wavelets
  • Quantitative ties: the Roy White method
  • Estimating accuracy and goodness of fit
  • Wavelet consistency across a dataset
Well-tie example
  • Backus averaging
  • Wavelets from near, mid, far, ultrafar stacks: checking consistency
Introduction to RokDoc 3D
  • Setting up seismic and well data
  • Manipulating seismic views
Seismic Data Conditioning Example
  • Spectral balancing including QC of results
  • Time alignment: trim statics
  • Amplitude balancing: how should it be done?
Simultaneous Inversion example
  • Setting up the input data
  • Creation and QC of the low-frequency background model
  • Inversion parameter testing:
  • Background model high-cut filter
  • Model weight
  • Use all the available substacks?
  • QC: fit to well and seismic data
Making Derivative Outputs example
  • Poisson’s ratio
  • Acoustic Impedance – Poisson’s Ratio projections
  • λρ - μρ
Alternative approach: Relative Elastic Impedance
  • Principles of extended elastic impedance and chi angle projections
  • Problems of gradient calculation
Chi Angle Projections example
  • Well cross-plots
  • Seismic intercept and gradient combination
Coloured Inversion
  • Principles
  • Pros and cons versus simultaneous inversion to absolute impedances

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