Seismic data processing

×

Error message

Deprecated function: The each() function is deprecated. This message will be suppressed on further calls in menu_set_active_trail() (line 2394 of /home/mustercl/public_html/includes/menu.inc).

MUSTER SERVICES LTD offers complete cycle of standard and specialized 2D/3D seismic data processing onshore and offshore, in transition zones and of any complexity.

Seismic data processing is conducted with due account of distorting factors (rugged topography, presence of gas-cap, perennially frozen rocks, velocity heterogeneities and others) applying up-to-date procedures and methods (dip-moveout correction, AVO-analysis, velocity-depth modeling, post-stack depth migration – PSDM and others). 

2D/3D seismic data processing is carried out subject to both standard and specialized processing procedures by taking into account basin peculiarities. 

2D/3D seismic data base is generated for each project (design) ranging from field works stage to final processing stage. 

 

MUSTER SERVICES LTD processes seismic data using the most sophisticated and up-to-date Paradigm Geophysical Corp. software package.

 

Standard processing procedures

Pre-stack data:

- seismic datasets or data copies upon completion of in-field processing;

- operator’s reports;

- SPS files.

Processing technique:

- pre-stack data analysis (seismic datasets, reports, data on near-surface works, etc.);

- testing of the basic processing parameters with the participation of the Customer’s supervisor;

- processing subject to the sequence chosen in Geological Project Task;

- processing subject to additional procedures specified in Geological Project Task.

While processing the quality of the acquired data is periodically evaluated and, if appropriate, processing parameters testing program is adjusted and work scope is reallocated among operators.

Continuity of operations is ensured while processing with particular attention being paid to the timely performance.

Basic processing flow:

- pre-stack data input and conversion into processing format;

- generation of project data base (spread geometry description, coordinates of source and receiver points, SPS-files control);

- Input of geometric data into seismic trace headers;

- accuracy control of geometric section description;

- terrain statics correction procedure for the pre-set datum plane;

- acquiring layout of shot and receipt point lines, geometry, fold;

- acquiring topographic maps, static corrections by sources and pickups;

- data review and editing of seismogram traces, polarity analysis;

- true amplitude recovery (correction of geometrical spreading);

- attenuation of low-velocity noise;

- reduction of pulse to the minimum phase shape;

- inverse filtering with due regard for surface conditions (in several gates) and band-pass filtering;

- trace normalization (surface-coordinated);

- seismic data pre-processing by CMP;

- pick up and tracking of the first refracted wave arrivals;

- statics evaluations by the refracted waves;

- stacking with datum statics and travel-time corrections;

- stacking velocity analysis (3 iterations);

- residual statics corrections (3 iterations);

- stacking with adjusted datum statics and travel-time corrections;

- attenuation of multiply reflected waves by CMP or СRP datasets;

- muting parameters selection;

- residual phase shift correction;

- stacking resulting in acquiring final aggregated 3D data volume;

- zero-phase inverse filtering and band-pass filtering;

- attenuation of incoherent data (FX- filtering);

- multi-fold composite trace normalization;

- preparation of velocity cube for migration;

- migration;

- zero-phase inverse filtering and band-pass filtering;

- attenuation of incoherent data (FXY - filtering);

- multifold composite trace normalization;

- tape recording of SegY-formated migrated stacks;

- preparation of processing report.

 

 

 

Special processing procedures

Pre-stack processing:

- Field investigations QC and reporting;

- compensation of signal frequency absorption (Q- filtering);

- spectral balancing;

- additional inverse filtering subject to surface conditions;

- additional surface-coordinated trace normalization;

- statics evaluation using refraction tomography method;

- evaluation of the low-frequency residual statics to compensate velocity heterogeneities of the upper part of the section;

- velocity analysis subject to anisotropy;

- spectral whitening by seismic dataset;

- attenuation of incoherent data as per seismic datasets;

- additional multiple waves attenuation by CMP seismic datasets using RADON algorithm;

- additional correction of residual phase shifts;

- pre-stack time migration;

- pre-stack depth migration;

- AVO - analysis;

- 2-fold resampling.

 

Post-stack processing:

- additional inverse filtering by stack;

- spectral whitening by stack;

- additional attenuation of incoherent data by stack;

- seismic inversion by interval velocities;

- signal-to-noise mapping using 3D data