Passive Seismic Tomography Services
Passive Seismic Tomography is the gem in our exploration toolbox. A methodology originating from regional seismology, downscaled after years of experience at an exploration level. Easily applicable, cost effective and environmentally friendly, it is a robust exploration alternative in cases where conventional practices wouldn’t be an option, either due to block size, penetration issues, budget limitations, accessibility and/or environmental restrictions.
Seismotech has already applied Passive Seismic Tomography in a number of “mission impossible” cases worldwide. In difficult geological settings, from thrust-belt zones and evaporitic environments to massive sedimentary deposits, as well as in extreme morphologies, from tropical jungles to harsh mountainous areas and environmentally sensitive zones. Our clients have acquired impressive results both at a reconnaissance level, where we have delineated the 3D structural image of enormous areas of interest at limited time and budget, as well as at a reservoir scale, where we were able to define productive and non-productive areas around known productive structures.
Having in mind that in order for the methodology to be applied, the area of interest has to be tectonically active, Passive Seismic Tomography is an excellent all-terrain, all-weather exploration tool for those areas, capable of giving answers in difficult exploration problems.
Insensitive to penetration problems due to high velocity layers close to the surface or HLH velocity effects that are common in thrust-belt zones, basaltic environments etc. (in opposition to conventional seismic)
WHY? one-way travel-times involved, since the sources lie within or below the target
Easily applicable in areas with accessibility limitations
WHY? stand-alone stations recording for a certain period of time; small crews
WHY? no active sources involved; receivers are installed and uninstalled leaving no environmental footprint
Cost Effective (especially for large exploration areas)
WHY? easily applied requiring small field units and minimum HSE control; ideal for minimizing exploration program expenses in case of large and/or difficult exploration blocks
Directly interpretable results
WHY? velocity cubes showing p-wave velocity or Poisson's ratio distribution below the area of interest
- Structural & lithological information of an area of interest
- Stress/fault information
- Aid in positioning of seismic lines
- Aid in well placement
- Improvement of poor quality conventional seismic data
- Correlation with other available data