Geochemistry: Seeps and Slicks

CGG is acquiring, processing and analyzing geochemical data from the sea floor (Seeps) and from satellite (Slicks).


The seep survey was carried out by CGG in June 2016. The area was covered by 272 successful core sites, whose locations can be seen on the map. All the samples were acquired using gravity coring, as the most rapid, generally more efficient, and safest method.

The analysis program consisted of:

  • Content of organic carbon and mineral carbon
  • Light (gaseous) hydrocarbon phase (C1 - C8) analyses
  • Heavy (liquid) hydrocarbon phase (C10 - C35) analyses
  • Carbon isotope analyses of gases
  • Biomarker analyses of liquid hydrocarbons



  • Interpretation report with relevant cross-plots, diagrams, summary maps and tables (pdf)
  • Results plotted as anomaly maps for relevant geochemical parameters on ArcGIS format
  • All numerical analytical and location data in both Excel and Shape files
  • All chromatograms from the liquid hydrocarbon analyses
core points


Over the Northern Viking Graben region CGG’s study comprises of 135 weather compliant satellite SAR scenes, see coverage map below. These create a near 15x temporal coverage (temporal coverage allows for an increase in slick confidence by removing ambiguity in the interpretation and allowing for the episodic nature of seeps) for the region and record over 100 slicks including potential seepage and repeating slick sites.

satellite scans


  • GIS positions of Slicks (Shape files) and confidence limits
  • Temporal repeats layer
  • Summary report
  • Images of slicks for details
  • Description of method, features and glossary
  • Summary report
  • Access to full dataset through NPA portal and web services



GeoConsulting - Geochemistry


Our Geochemistry services range from routine source rock and maturity analyses through to oil, condensate and gas characterisation and migration modelling.

Multi-Client Data - JumpStart

JumpStart Integrated Programs

Accelerate your exploration with CGG's JumpStart packages, integrating advanced seismic data with calibrated wells and geological data, all easily accessible from the same place
GeoConsulting - (update) Robertson Geochemistry

Robertson Geochemistry

Providing geochemists and petroleum geologists with a comprehensive and consistent tool for displaying and understanding geochemical data.
GeoConsulting - Seep Explorer

Seep Explorer

Use offshore seeps to de-risk your prospects. Our satellite derived offshore seeps database covers over 90% of all offshore sedimentary basins.
Multi-Client Data - North Viking Graben

Northern Viking Graben

A huge integrated geoscience program covering 44,000 km2 of the Northern Viking Graben. BroadSeis-BroadSource ghost-free data with reservoir-oriented QC.
GeoConsulting - (update) Robertson Core Description

Robertson Core Description

A web-delivered product that offers quick and easy access to a growing database of 1:200 scale core descriptions from over 750 clastic exploration wells from the Norwegian Continental Shelf (NCS).
Multi-Client Data


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