Amplitude modification

Anisotropy calculations from Walkaway VSP data. 

Spatial interpolation of wavelets. 

To generate angle dependent reflection responses computed from well logs.

To estimate scalar wavefields from Walkaway VSP vectorial wavefields in TauP space. Can be used in conjunction with module TauP2D.

Calculation of vertical times and velocities below seismic datum. Produces time-depth and velocity curves and a computation sheet and outputs a .sgy file with vertical times below SRD set in headers.

Correlation of seismic data (carried out in the time domain) from 1 input file containing both operator and operand traces in a multi-trace- per-record file. Primarily designed for correlation of Vibroseis data. 

Correlation & convolution of seismic data (carried out in the time domain) from 2 input files (operator & operand).

Deterministic and Statistical deconvolution.

Depth to time conversion of imaged data using a velocity model from DIVINE.

Adds the data in all the 'Add' input files to the data in the 'Primary' input file. Amplitudes are added sample-by-sample.

Subtracts the data in the 'Subtract' input file from the data in the 'Primary' input file. Amplitudes are subtracted sample-by-sample.

To apply a single filter or time variant filters of type Ormsby, Butterworth, Ricker Wavelet or Phase Rotation

To apply an FK Fan Filter or Wavenumber Filter.

Either transforms 3-component data recorded using non-gimballed geophones to the coordinate system:- Vertical, Horizontal East and Horizontal North or sets the calculated VSP plane rotation angle in file header without transforming the data.

Interrogation and setting of SEGY file headers interactively or in batch run.

To display hodograms of 3-component data.

VSP Trace Inversion of Upgoing Wavefield VSP traces or the output from module SparseSpike. 

Median Dip Filter.

Appends chosen traces from up to four input files to a single output file.

Builds a 1D anisotropic velocity model from walkaway data to control the time migration program TmigAn.

Time migration of any 2D VSP dataset based on Time-Depth pairs from headers or ascii model and including anisotropy. The four propagation mode options cover all mode-conversion eventualities. The options also include Walkaway downwave migration.

Muting of selected traces or front/rear blanking.

To remove or apply Normal MoveOut to VSP traces using a velocity profile calculated from a text file of depth-time pairs, a single user- supplied velocity or trace header values.

Orientation of 3-component data.

Parametric wavefield separation.

Prediction of events above the shallowest VSP level.

Projection onto selected 2D plane and interpolation of traces.

Combines the vertical and horizontal component wavefields of Walkaway VSP data (in Tau-P space) into scalar P and S-wavefields.

Estimates Q from spectral-gradient differences.

To stretch and squeeze traces according to some geophysical requirement e.g. for time-to-depth conversion via a complex earth model.

To re-sample seismic data.

Re-samples seismic data and removes start delay header values (where possible use ReSample in preference).

Trace selection and sorting.

Generation of a sparse spike series from Upgoing Wavefield VSP data. Output can be input to module Inversion.

Noise suppression based on spectral amplitudes.

Spectral Analysis of surface seismic/VSP data.

Applies a median or mean stack to traces in a single file.

Generation of  all Synthetic Seismogram responses from a Reflection Coefficient series.

Forward and reverse Tau-P transform, Tau-P trace interpolation.

Time migration using a model from module ModelBuilder1D.

Automates the identification and flagging of bad data based on statistical properties of nearby traces.

Trace integration.

Transposition of VSP traces.

Time shift data based on trace headers or constant values.

Bin stack or VSP CDP transform. Maps a VSP data set from “NMO space” to its true spatial (XZ) locations.

Corrects offset source data for NMO due to geometry (maps data from recorded time to 'NMO space') using a raypath text file generated by DIVINE.

Maps VSP data from "NMO space' back to recorded time.

Generation of a synthetic VSP dataset from a reflection coefficient series and a text file containing vertical depths and times below SRD.

Statistically based wavelet matching of VSP to Surface Seismic, Synthetic Seismogram to Surface Seismic data or vice versa.

Wavemode filter creating P and S wave files from the vertical and Inline horizontal components.

Correction of geophone, borehole log and formation top depths to the vertical using deviation data. Optionally outputs a .sgy file with vertical depths set in headers, a LAS format log file with a vertical depth column and a formation tops file formatted for use in ZebraSeis.