Particularly in today’s unconventional production environments, economic viability is hard-won. You need all the help—and data—you can get. FairfieldNodal’s multi-component processing capabilities can further enhance the estimations key reservoir characteristics, which can ultimately determine your success.

Shear Waves and Converted Waves

A compressional wave (p-wave) propagating through the earth not only reflects as p-wave and but as an upward traveling shear wave (s-wave or converted wave) as well. Shear waves have unique properties that can aid in:

  • Fracture characterization (orientation and density)
  • Lithology identification and rock properties (e.g. Vp/Vs and Poisson’s ratio)
  • Pore fluid identification
  • Imaging through gas saturated sediments
  • Imaging shallow sediments with higher resolution than P-P waves

FairfieldNodal has over 20 years processing converted wave (3C) and shear wave (9C) data. We have worked closely with clients to develop tools and processing flows to obtain the best shear wave image possible.

Converted Wave Processing

Converted wave processing and analysis is more complex and challenging than p-wave processing. Special care must be taken in rotation of the data from H1 and H2 to radial and transverse, asymptotic conversion point binning, shear wave statics, analysis of shear wave anisotropy and converted wave/p-wave event correlation.

In this comparison of radial rotated data to “fast and slow” rotated data, the regional anisotropy was subtle but detectable. Our 2C rotation allowed us to better focus on subtle lithology changes.
In this comparison of radial rotated data to “fast and slow” rotated data, the regional anisotropy was subtle but detectable. Our 2C rotation allowed us to better focus on subtle lithology changes.
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Learn more about FairfieldNodal's multi-component processing capabilities.

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