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.

 

3-D time data volume (coherence-cube time stack)

3-D time data volume  
(coherence-cube time stack)

3-D time data volume (coherence-cube time stack)

3-D time data volume  
(coherence-cube time stack)

 

3-D time data volume (spatial image)

3-D time data volume 
(spatial image)

Migrated 3-D data volume (spatial image)

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.

 

Time seismic data processing

 Adaptive subtraction of different types of noises

 

 

Time seismic data processing

The result of several registrations merging

 

 

Time seismic data processing

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 in 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 of salt surfaces

 Volumetric image of salt surfaces

Volumetric image of salt in depth-velocity model

Volumetric image of salt in depth-velocity model