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Graph of processing

three steps
1 stage: Pre-processing of seismograms

  • Accounting for geometrical spreading using thet3.
  • Automatic edition of seismograms, which includes algorithms
    - suppression unit of high-emission;
    - release of energy released tracks or sections thereof, followed by their zeroing, rejection, substitution on the average.
  • Filtering the wave field:
    - bandpass filter.
  • inverse filtering (deconvolution)
    - deconvolution compression, minimum-phase;
  • Correction of surface-consistent amplitude variations;
  • Analysis of velocity over the horizon and vertical spectra;
  • Construction"assessment" depth-velocity model;
  • Selecting procedures for pre-processing of seismograms;
  • Correction of residual static corrections;
  • Getting treated with the above described procedures, the data set.

2 stage: Preparation for kinematic processing

  • Analysis of velocity over the horizon;
  • Building a deep-velocity model of the 3D, incorporates the core speed heterogeneity
  • Select a model consistent with the depth of effective high-speed performance (VTransform) of the field of single and multiple waves,
  • Analysis of velocity over the horizon (every tenth line) for high-speed characteristics of multiple reflections,
  • Modeling multiple reflections of high-speed adaptive filters and subtract multiples of noise
  • Balancing frequency amplitude spectrum (MDTV-time-dependent selective predictive deconvolution),
  • Migration, based on reservoir depth-velocity model and to obtain the dynamic depth of the cut.

3 stage: Post-migration treatment

  • Translation of the resulting depth migrated section of the staging area for postmigratsionnoy processing, which includes:
    FXDECON3D,
  • AMPLDECON - amplitude dekovolyutsiyu;
  • Balancing amplitudes,
  • Receipt of the final depth migrated section of the dynamic.

Pre-processing of seismograms

Correction of surface-consistent amplitude variations

Analysis of the amplitudes in the area

Analysis of the amplitudes in the area

Correction of surface-consistent amplitude variations

before correction after correction

before and after correction of the amplitude

before and after correction of the amplitude

Correction of static corrections

Correction of static corrections

correction to the static after the correction of the static

effect of the correction of static correction to the quality of the spectra

effect of the correction of static correction to the quality of the spectra

correction to the static after the correction of the static

 

Next - 2nd stage: Preparation for kinematic processing