Geochemical Services

Algeria, Berkine Basin

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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

Berkine Basin Concessions Map

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Stratigraphic column

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Model well location in relation to the survey area

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The detected compounds used to differentiate Oil ns. Background (dry) character

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Map showing top of triassic TAG-1 structure, faults, the client's proposed well (RFD-1) and the GORE® Survey group

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GORE® Survey results. The red areas indicate geochem anomalies which reflect a high probability of hydrocarbon occurrence

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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