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22-06-2017
Our booth at the 79th Conference & Exhibition EAGE (photo report)
June 12-15, 2017
Paris, France

 


17-11-2016
Important information!
At this time, all new technology implementation, seismic data processing and interpretation projects are being operated by NPP Spetsgeofizika, founded in 2007. GDS retains its role as a petroleum geology consultancy and purveyor of innovative technologies.


08-06-2016
Our booth at the 78th Conference & Exhibition EAGE (photo report)
May 30 — June 2, 2016
Vienna, Austria

78th Conference & Exhibition EAGE


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    AViSeis® ®    
IST-3MP — static correction interactive technology ® SeisWin — field QC ® GDS-I — vibrator control geophysical digital system ®

Geophysical Data Systems LLC has been examining the potential applications of non-linear phenomena in seismic exploration since 2003, and has completed pilot land surveys (2D and 3D) and VSP surveys to test the proposed method. We completed pilot programs to provide an answer to several fundamental questions, i. e. to evaluate the significance of non-linear wavefield components recorded on the surface and in the wellbore as predictors of the properties of underground features, and first of all of petroleum reservoirs, the effect or non-linearity of vibrator signals and surface waves on recorded non-linear components, and the impact of non-linearity of source and surface waves to non-linear responses from actual geological features.

Many years of GDS research, with pilot exploration programs at several oil and gas fields confirmed that the vibroseis wavefields have noticeable non-linear properties that are primarily related to multi-component porous, fissured, permeable, and fluid-saturated rock and resulted in identification of major indicators of non-linear behavior associated with geological features. These include:

  • Generation of harmonics and subharmonics
  • Generation of combination frequency waves
  • Disproportional changes in received signals in response to increased source signal energy

Applications:

  • Prospecting, exploration and production optimization (in combination with conventional seismic surveys)
  • Evaluation of reservoir rock properties
  • Production monitoring

Employing such non-linear phenomena as generation of multiples and combination frequency waves and the independence of reflected wave amplitude paves the way to the development of new more economical survey, data processing and interpretation techniques.

The results of our work have been published in scientific journals and patented. The published materials may be found on the Publications page of this site.