AVO & Attributes - Seismic - Technology
RSI offers its clients a full complement of prestack (AVO and Inversion) and poststack (Hilbert Transform) attributes.
Reconnaissance exploration objectives are often met using a combination of the following attributes :
Prestack (AVO and Inversion) Attributes
- P-wave Impedance Reflectivity
- S-wave Impedance Reflectivity
- P-wave Velocity Reflectivity
- S-wave Velocity Reflectivity
- Pseudo-Poisson’s Reflectivity
- Fluid Factor
- Intercept
- Gradient
- Elastic Impedance Reflectivity
- Lambda-Rho Reflectivity
- Mu-Rho Reflectivity
poststack (Hilbert Transform) Attributes:
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
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
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
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