ATTRIB3D®
Seismic attribute calculation
ATTRIB3D computes post-stack seismic attributes. Originally developed under the sponsorship of the Seismic Attributes Consortium, ATTRIB3D is available from Rock Solid Images as a stand-alone Unix application. The package is also available as "Rock Solid Attributes" within the Kingdom Suite from Seismic Micro Technology or as the ATTRIB3D plug-in within Landmark Graphics' GeoProbe application
There are a total of 78 Attributes and they are catagorized as instantaneous, wavelet, geometrical and gabor morlet. As of June 2007 the curvature attributes indicated by an * are only available in the Rock Solid Images package.
Seismic attributes are essential interpretation tools and ATTRIB3D allows the user to select from a wide range to meet every interpretation need:
ATTRIB3D Seismic Attributes
- INSTANTANEOUS ATTRIBUTES
- Real part of complex trace
- Imaginary part of complex trace
- Trace envelope
- Time derivative of the envelope
- Second derivative of envelope
- Instantaneous phase (between ± 180 degrees)
- Instantaneous frequency
- Envelope weighted instantaneous frequency (Hz)
- Thin bed indicator
- Acceleration of phase (cycles/sec/sec)
- Dominant frequency (cycles per second)
- Band width (given in octaves)
- Instantaneous Q factor
- Normalized amplitude (cosine of the instantaneous phase)
- Envelope amplitude modulated phase
- Relative acoustic impedance
- WAVELET ATTRIBUTES
- Wavelet envelope
- Time derivative of the wavelet envelope
- Second derivative of wavelet envelope
- Wavelet phase (between ± 180 degrees)
- Wavelet frequency
- Envelope weighted wavelet frequency (Hz)
- Acceleration of phase (cycles/sec/sec)
- Dominate frequency (cycles per second)
- Band width (given in octaves)
- Wavelet Q factor
- Apparent polarity of wavelet
- GEOMETRICAL ATTRIBUTES
- Event Continuity
- Sand/Shale Ratio
- Chaotic Reflection
- Parallel Bedding Indicator
- Zone of Unconformity
- Dip of maximum similarity
- Dip Variance (average-local)
- Similarity
- Smoothed Similarity
- Similarity Variance (average-local)
- Smoothed dip of maximum similarity
- Instantaneous dip
- Instantaneous lateral continuity
- Dip azimuth
- Upper Bed Thickness (msec)
- Upper Amplitude of Max Bed Thickness
- Upper Morphology
- Middle Bed Thickness (msec)
- Middle Amplitude of Max Bed Thickness
- Middle Morphology
- Lower Bed Thickness (msec)
- Lower Amplitude of Max Bed Thickness
- Lower Morphology
- Mean Curvature *
- Maximum Curvature *
- Minimum Curvature *
- Gaussian Curvature *
- Most Negative Curvature *
- Most Positive Curvature *
- Dip Curvature *
- Strike Curvature *
- GABOR-MORLET ATTRIBUTES
- Envelope of Sub Bands
- Phase of Sub Bands
- Trace of Sub Bands
- Spectral Balance
- Band limited Relative Acoustic Impedance
- Mean Frequency of Spectra
- RMS Frequency of Spectra
- Band Width of Spectra
- Skewness of Spectra
- Kurtosis of Spectra
- Maximum Subband of Envelope
- Frequency of Maximum Subband Envelope
- Phase of Maximum Subband Envelope
- Q by Frequency Shift
- Q by Spectral Ratio
- Anomalous Absorption
- High Absorption Low Impedance
- High Absorption High Impedance
- Low Absorption Low Impedance
- Low Absorption High Impedance