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JEBIL


GEOGRAPHICAL SETTING

The Jebil block is located in onshore South-CentralTunisia.

ACREAGE

2836 km².

GEOLOGICAL SETTING

The JEBIL block is located on the northern edge of the Sahara platform, within the central part of Permian Basin. The Permian Basin was developed along a NW-SE strongly subsiding axis, passing across the eastern portion of the Jebil Block. Along this axis, over 4000m of Permian sediments were accumulated.

PETROLEUM SYSTEM

Reservoirs and Seals

  • The Triassic Kirchaou sandstones were considered as a primary reservoir target in the block at least in western portion of the block, close to Baguel/Tarfa gas field. The evaporitic facies which surmounted the Kirchaou reservoir was considered as a good seal.
  • The Permian reef is considered as a potential reservoir within the block. The Late Permian is the only Paleozoic system outcropping in Tunisia toward the eastern part of Tamazret Block, at Djebel Tebaga near the town of Mednine. These reefs are well sealed by Upper Permian shales.
  • The Ordovician sandstones are considered as an emerging play within the block. These reservoirs are gas and condensate producing in Sabria and El Franing fields located to the east. The intraformationnal shales are considered as a good seal for this reservoir.
 

Source Rocks

  • The Upper Silurian-Lower Devonian Fegaguira”Hot shale” and the Ordovician Azel shale are the main source rocks.
  • The Permian shows locally good source rock characteristics
 

Traps

  • The trapping system in the zone includes tilted fault blocks, faulted anticlines; low amplitude anticlines and stratigraphic traps (pinch out, channel fill within the TAGI reservoir, and patch reef within Upper Permian)


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