Crestone Software

 

Wavelet Stretch Compensation (Stretcomp) – Corrects for wavelet stretch on the far offset traces of NMO corrected CDP gathers .Applying NMO correction to CDP gathers causes the seismic wavelet to stretch at shallow times and large offsets. Also wavelet stretch can occur on any pre-stack dataset with increasing offsetand time. Using small windows, this tool moves down in time and applies a stretch correction filter and outputs CDP gathers withstretch removed.

 

Azimuthal Velocity Residual Analysis (Velresa)

  • Automatically picks velocities at different azimuth orientation

 

Performs azimuthal and standard velocity residual corrections to pre-stack uncorrected CDP gathers. The output from this tool is a detailed(every trace and sample) VEL or VAZ velocity table. The velocitytables can then be used to apply NMO to the seismic data. In the case of the azimuthal velocities (VAZ), we can create azimuthal anisotropy computations like Ellipticity.

 

VAZ Tool –

  • Uses the velocities picked from VELRESA and calculates Ellipiticity (ratio of Anisotropy in fast vs slow direction), you also get the direction (Azimuth).

 

Manipulates the azimuthal velocity data in a VAZ parameter table. The user can 1) Select velocities from a single azimuth, 2) Output a VEL table that is the average for all azimuthal velocities, 3) Perform standard deviation of the azimuthal velocities, 4) Compute Ellipticity and Elliptical Azimuth from the azimuthal velocities.

 

3D High Frequency Enhancement (Homer)

  • What we call HIRES, extend the bandwidth up to maybe double the Frequency range.

 

Enhance seismic data by extending the usable bandwidth of the seismic spectrum into higher frequencies. A constrained inversion is performed to compute reflection coefficients. The coefficients are then convolved with a bandwidth enhanced wavelet to create the high frequency section. The reflection coefficient series can be analyzed, interpreted, and used in additional processing.

 

Hi Res RHO Filter (RHO)

  • Gets an additional 10-20 Hz. In higher frequency.

 

Enhance frequency bandwidth by applying a zero-phase filter of the form fx. The high frequency information from the RHO filter is combined with the original lower frequency data to produce the broadband output.

 

3D Volumetric Curvature (Curvy)

  • Vol Curvature is calculation of the rate of change in dip. Is good for enhancing faults and fractures.

 

Volumetric curvature attributes are valuable in mapping faults, fractures, folds, and stratigraphic features. Curvature attributes such as Most Positive, Most Negative, Mean, Gaussian, and others can be output.

 

3D Wavenumber Noise suppression (Wavy) –

  • Good for footprint acquisition removal

 

Suppress noise footprints like the acquisition footprint in seismic data by 3D wavenumber filtering. Special feature will smooth 3D data but leave the structural/stratigraphic geology intact.

 

Dip/Azimuth Semblance (Dazzle) –

  • Data Enhancement Tool, good alternative to FXY Decon on a lot of data especially data with dip.

Builds a 3D dip and azimuth model using semblance. The dip and azimuth models are seismic attributes used to help with structural interpretation. The models can be used to create additional seismic attributes like 3D Volumetric Curvature. The models can be used to subtract noise patterns or enhance seismic events and improve the signal-to-noise ratio in poor quality datasets. The program works on pre-stack or post-stack seismic data.  

 

Low Frequency Kx-Ky Filter (Freqxy) – 

  • Good for eliminating ground roll or surface noise

 

Low Frequency Kx-Ky filtering can attenuate surface wave noise by wave-number filtering in the X and Y dimension over low frequency ranges. The tool is run in the shot domain and works especially well on cross-spreads in azimuthal mode.

SVD Filter – Attenuate surface wave noise by singular value

decomposition and eigen-image filtering.

 

Multi-Channel Adaptive Subtraction (Subtract) – Model the noise to the data and then subtract the noise from the data using predictive Deconvolution. Can output the signal or the modeled noise.

 

Spectral Decomposition (Specdecomp) – Image and map temporal bed thickness and geologic discontinuities over 3D seismic surveys. Outputs such as Frequency Spectrum, or Frequency Slices can be computed in time or on horizons.

 

FXY Interpolation

  • Good 3D prestack interpolation tool, can interpolate missing data (i.e. if you are missing some shots or receivers you can fill in a skip)

 

Interpolate and extrapolate missing spatial locations in 3D seismic data. Also performs pre-stack FXY Deconvolution. Input several types of ensembles and in-fill seismic data into empty locations to improve the spatial sampling of the data.

 

Block Move-Out (Blockem) – Perform high resolution normal move-out with no stretch effects. Time and space variant functions allow control over

move-out in 3D.

 

Normal Moveout Correction – Compute dynamic normal move-out corrections. Options to control stretch mutes. Can perform azimuthal NMO using a VAZ table. Options to apply a 4th order (ETA)table.

 

Seismic Display – Interactive seismic display for 2D and 3D data on ProMAX datasets and SEGY. Interactive options for spectral analysis, trace headers, first-break picking, ProMAX tables, CVS velocity analysis, Semblance and ETA velocity analysis, Geometry building, phase, bandpass filter, AGC tests, time slices, geometry viewing and editing, and more. Can perform data overlays and veryfast image scanning.

Steve’s Mapper – Interactively map geometry information from ASCIIfiles, the ProMAX database, or trace headers. Line ties, partial3D extractions, printing, images, polygons, mapping attributes in2D and 3D, and more.

 

3D Partial Extractions (Extract) – Extract partial volumes from 3Dseismic data. A set of polygons define when a trace can beaccepted or rejected from the dataset.

 

Paint CVS Stack – Use constant velocity stacks to build a seismicstacked section. A window from a CVS panel using the velocitymodel is painted into a stacked section.

TFD Noise Removal (TFDNoise)

  • Good for removing spurious noise of spikes on data, but still runs very slow so is expensive to run.

 

Time and frequency domain noise suppression and spectral balancing. Attenuates noise bursts, spikes, air blasts, ocean swell, and other noise. Several options for analyzing noise including Frequency Variant and Median Frequency. Option to output noise only or filtered data.

 

Radial Trace Filter – Convert to the radial domain where bandpass filtering will attenuate or enhance wave modes whose move-out is linear. Great for ground roll removal.

 

Energy Envelope Scaling – Boost the amplitude of low energy zones relative to high energy zones in a time a space variant manner. Improve the amplitude of events that are over-shadowed by high energy seismic events.

 

Offset-Time Scaling – Boosts the amplitude of seismic data by offset and time. Two methods are employed to compute offset-time scalars: Mean Amplitude or Cross Correlation. A table of offset-time scalars is output that varies in space and time over the dataset.

 

Time Slice/Un-Slice – Converts post-stack seismic data to timeslices and back. Used in 3D spatial filtering tools likeVolumetric Curvature.

 

Smoothing/Edge Filters – Reduce noise in seismic data by smoothing in 3D. Three methods used are Gaussian Blur, Sobel Edge Detection,and Symmetric Nearest Neighbor smoothing.

Velocity Profile – Create a velocity profile that replaces the trace amplitude values at each sample with interpolated velocity values. A complete seismic dataset is output that matches the seismic amplitudes with a corresponding velocity.

 

Ring Removal (Ringy) –    Removes ringing noise from seismic data using spectral shaping deconvolution filtering. Ringing noise can be specified by a frequency range. A deconvolution filter is built that creates a model of this range of frequencies and applies it to the data.

 

Other Tools - Deconvolution, Trace Killer, Hole Extraction, Common Offset Display, Vertical Stack, Primary/Secondary Exchange,Azimuth Moveout, Rolling Supergather Create, and more. 

 
 
Hardin International Processing, Inc.
5300 Democracy Drive, Suite 100
Plano, Texas 75024
972-312-9221
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