Attribute Extraction from Seismic Reservoir Models

The seismic reflections from reservoir flow-units can be characterized in terms of phase, frequency and amplitude components (i.e. seismic attributes). To facilitate seismic-petrophysics integration, it is important to:

  • Measure waveform characteristics for each model.
  • Identify waveform characteristics that discriminate and charactrerize flow-units.

    The goal of seismic attribute mapping is to quantify flow-units via seismic waveform variability. Steps include:

  • Spatially Delineate the zone-of-interest,
  • Isolate/Subset the window or boundary that encompass flow-units,
  • Compute seismic attributes within the analysis window,
  • Reduce attribute measurements to one value per spatial location,
  • Display attribute reductions in map form,
  • Evaluate the spatial geometries/patterns (are they petrophysically significant?),
  • Benchmark the waveform variability to petrophysical/flow-unit properties.

    Seismic reflection data can be subdivided into components that make up the seismic waveform:

  • phase,
  • frequency,
  • amplitude,
  • statics,
  • noise,
  • etc...

    Trace attributes such as response phase, energy envelope, spectral decomposition, etc... isolate/subset groups of these seismic waveform characteristics.

    Attribute Definitions

    USP Attribute Generation

    The modular nature of USP allows thorough and effective signal analysis; whether targeted at model or real seismic data. Programs such as "asig", "spec", etc... in conjunction with "windstat" provide seismic sequence attribute mapping functionality in USP. Signal analysis/attribute results can be view within the USP framework using "xsd".

    Return to Seismic-Petrophysics Index.