Seismic data processing

Yug-Neftegaz Private Limited has got its proprietary seismic and borehole data processing and integrated interpretation center residing in 320 m² office premises.

Our center is equipped with up-to-date, high-performance hardware and Paradigm® software packages - the world's industry leader in geological prospecting survey solutions, enabling high-quality and fast data processing and interpretation.

The center staff is the team of highly qualified geophysicists and geologists with extensive experience in processing and interpretation of seismic data acquired on-shore and off-shore. The operation portfolio of the center's experts comprises above 50 successfully completed oil & gas projects in Eastern and Central Europe, Central Asia, Africa, South America and the Middle East.

Close co-operation and co-ordination between the departments of the center allow for choosing the most effective way of seismic data processing depending on geological tasks set.

Seismic data processing is performed by applying up-to-date Paradigm® software package: 

  • Echos - for seismic data processing 
  • GeoDepth - for velocity-depth modeling.

 

Temporary Cube 30 horizontal slice
3-D time data volume
(coherence-cube time stack)
Migrated cube 30 horizontal slice
3-D time data volume
(coherence-cube time stack)

 

Temporary cube 30 three dimensional
3-D time data volume
(spatial image)
Migrated cube 30 three dimensional
Migrated 3-D data volume
(spatial image)

 

The result of seismic data processing is an acquisition of a high resolution 3-D image of geoenvironment with an optimum S/N ratio.

 

  • processing 2D, 3D data of any complexity degree acquired on-shore, off-shore and within transition zones,
  • processing large seismic dataset,
  • seismic data processing without sacrificing amplitude cor-relation (amplitude processing],
  • unique algorithms of adaptive subtraction of various noises, correction of upper part of the section,
  • multiple wave suppression,
  • merging several seismic surveys acquired under different seismological conditions using various techniques and recording parameters,
  • velocity modeling of any complexity degree,
  • various algorithms of 2D, 3D pre-stack and post-stack time migrations.

 

Adaptive subtraction different types noises
 Adaptive subtraction of different types of noises

 

Result several registrations merging
The result of several registrations merging

 

 

Velocity model cross section static corrections LVL
Velocity model of the upper part of cross-section for static corrections, including LVL

 

In case of substantial and sharp velocity changes in horizontal and vertical directions resulting in time domain distortions, pre-stack depth migration (PreSDM) is performed.

 

This stage includes:

  • velocity - depth modeling of any complexity degree with due regard for geologic structure of the survey area (for example, in areas of salt-dome orogeny, thrust fault zones, clay diapir, etc.),
  • modeling of structural elements of any complexity degree and their inclusion in velocity-depth modeling for migration, 
  • velocity model updating by several iterations, 
  • various algorithms of 2D, 3D pre-stack and post-stack depth migration mapping, 
  • medium anisotropy factor consideration.

 

Main processing stages different geological regions
Main processing stages in different geological regions

 

 

Initial depth-velocity model
Initial depth-velocity model
Depth-velocity model with structure surfaces included
Depth-velocity model with structure surfaces included
Refined depth-velocity model
Refined depth-velocity model

 

 

Volumetric image salt Surfaces
Volumetric image of salt surfaces
Volumetric image salt depth velocity model
Volumetric image of salt in depth-velocity model