Congo License Round Phase II 2018-2019

Cuvette Basin

N

Permis Koba, Mbesse, Mboloko, Mboto and Ntsinga are located
within the Cuvette Basin, onshore Republic of Congo. These
blocks border the Democratic Republic of Congo (DRC) to the
west, along the Congo River.

Legend
Divine Inspiration
Group
Total
ENI
Pilatus

100 km

Open Blocks

Onshore Cuvette Basin

No wells have been drilled in the Cuvette Basin within the
Republic of Congo, only 4 dry wells have been drilled in the entire
basin. Gilson-1, drilled 440 Km to the east of the blocks is reported to have contained oil shows. These are speculated to be
sourced from the Devonian Alolo Shales. There are currently no
discoveries in the Cuvette Basin and no wells have been drilled
since the 1980s.

Potential source rocks include the Neoproterozoic Ituri Formation (stromatolitic reefs, 1.1% TOC and Type I kerogen), the
Cambrian-Ordovician Mamungi Shale Formation (1.7% TOC), the
Silurian-Devonian Alolo Shale Formation (up to 3.85% TOC in
Gilson-1, Type II/III kerogen) and the Jurassic-Cretaceous
Stanleyville Group (8-20% TOC). Source rocks are expected to
be best developed within the syn-rift depocentres and in synclines
generated by compression.

Numerous potential reservoirs are present representing a wide
range of depositional environments. These include Upper
Proterozoic reefal build-ups, Cambrian-Ordovician alluvial fan
sandstones, Silurian-Devonian deltaic sandstones, CarboniferousJurassic Karoo Supergroup glacial and alluvial sandstones and
Jurassic-Cretaceous fluvial-lacustrine sandstones.
Several periods of tectonic activity have resulted in the inversion
of previous extensional half-grabens, creating a wide range of
structural traps. Stratigraphic and combination traps are also
likely to be present.There are several sealing intervals present in
the basin, the post-rift intervals are expected to provide the most
widespread and effective seals.

Schematic cross section
Delineation of sub-basins and horsts based on Magnetic and Gravimetric data (after SNPC, 2013)

S

N

Jurassic to recent

Carboniferous-Permian Karoo Group

Cambrian-Ordovician Lokoma Group

Permian-Triassic Karoo Group

Devonian-Carboniferous Aruwimi Group

Late Proterozoic Ituri Group

Schematic cross section

Basement

5 Km