Seismic Anisotropy

Real rocks are not isotropic: velocity depends on direction. Learn the Thomsen parameters, VTI and TTI media, and azimuthal signatures of fractures and stress, with interactive models that show what anisotropy does to moveout and amplitude.

20 interactive sections across 6 books
Start here → The Thomsen Parameters, from Synthetic Seismic Modeling

Synthetic Seismic Modeling

  1. The Thomsen Parameters
  2. Why Rocks Are Anisotropic
  3. Tilt the Axis: VTI, TTI, HTI
  4. What Anisotropy Is
  5. Hudson and Linear Slip
  6. Azimuthal Velocity
  7. Building a Fractured Model
  8. Fluids in Fractures
  9. Fractured Carbonate
  10. Anisotropic Moveout
  11. Azimuthal AVO (AVAz)
  12. Shear-Wave Splitting

Physics-Informed Neural Networks for Exploration Seismology

  1. Anisotropy: VTI and TTI media

3D Seismic Interpretation

  1. Anisotropy and azimuthal attributes: fractures and stress
  2. Subsalt imaging: Thunder Horse from Kirchhoff to FWI to QI

Seismic Acquisition

  1. VSP: zero-offset, walkaway, walkaround

Seismic Data Processing

  1. Elastic and anisotropic FWI

Geostatistics

  1. Isotropic and directional variograms
  2. Anisotropy: range, sill, geometric vs zonal
  3. Anisotropic ellipsoids and the search ellipse

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