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CHAFFAR


GEOGRAPHICAL SETTING

The chaffar block lies in eastern offshore Tunisia within the Pelagian Basin. The water depth is less than 100 m.

ACREAGE

3524 km².

GEOLOGICAL SETTING

The CHAFFAR block is located in the Pelagian province and crossed by the NE - SW Kerkennah high. This later is developed during late Oligocene time and has remained a structural high to the present day. The block is a part of a Mesozoic-Cenozoic platform characterized by dominant carbonate sedimentation and affected by NW-SE trending faults that controlled facies distribution.

PETROLEUM SYSTEM

Reservoirs and Seals

  • The main targets in Chaffar are: the Turonian Bireno bioclastic limestones and Coniacian oolitic Douleb limestones and the Lutetian Reineche nummulitic limestones.
  • The Senonian Abiod fractured chalky limestone and the Aptian Serj reservoirs are considered as a potential reservoirs target.
  • The Albian, the Santonian and the Maastrichtian shaly levels provide good seals to Cretaceous reservoirs.
 

Source Rocks

  • The Albian Lower Fahdene shales and the Upper Cenomanian-Lower Turonian Bahloul limestones are the main source rocks in the area.
  • The Ypresian Bou Dabbous dark limestones are considered as an additional souce rock for the area.
 

Traps

  • The seismic interpretation allowed defining several structural traps. These structures are mainly anticlines, faulted anticlines and Tertiary faulted blocks. Reef build-up could be considered as a stratigraphic trap target within the block.


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