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Home > Products > Geochemical Services > Petroleum Exploration > Case Histories > Algeria, Berkine Basin

Algeria, Berkine Basin

Survey Area  

Geology:

  • 4-way structural closure
  • Target: Triassic TAG-I sandstone
  • Sources: Devonian Frasnian shale and Silurian Tannezuft shale
  • Top seal: thick sequence of Liassic salts and evaporates
  • Topography: Extensive sand dunes with patches of gypsum

Survey Summary

  • semi-regular grid pattern w/ ~1 km spacing
  • 72 grid samples; 5 model well sites
  • 65 km2 coverage

Map
Berkine Basin Concessions Map
Statographic Column
Stratigraphic column

Map
Model well locations in relation to the survey area
Compound Graph
The detected compounds used to differentiate Oil vs. Background (dry) character 
Map
Map showing top of triassic TAG-1 structure, faults, the client’s proposed well (RFD-1) and the GORE™ Survey grid
Map
GORE™ Survey results. The red areas indicate geochem anomalies which reflect a high probability of hydrocarbon occurrence

Survey Results

  • Results indicate that there is a large geochem anomaly that closely corresponds to the TAG-I structure
  • The client drilled the TAG-1 location which was on the edge of the geochemical anomaly, located on the downdip edge of the seismic mapped structure. The results of drilling the well was the discovery of 3 meters of net oil pay in the TAG-1, which was not completed for economic reasons
  • A second high probability geochemical feature located in the NE part of the survey warrants further evaluation as a stratigraphic trap possibly in a deeper Carboniferous formation

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