Open Blocks: AJIM BLOCK

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GEOGRAPHICAL SETTING

The Ajim block is mostly an offshore block, located South-Eastern offshore Tunisia, between Jerba Island and the shore line of Gulf of Gabes.
This block is located within a prospective area as documented by the the Robbana and Ezzaouia oil fields.

ACREAGE

388 km². 

PREVIOUS EXPLORATION

About 5800 km of 2D seismic have been shot and eight (08) wells have been drilled.

GEOLOGICAL SETTING

The tectonic feature in this area is dominated by NW-SE network fault system. Therefore, most of the leads and prospects are three-way-Dip closure. These structures were subject of series of compressional events through Upper Cretaceous to Tertiary time.

HYDROCARBON POTENTIAL

Reservoirs :
● The Upper Cenomanian Zebbag Dolomite exhibit a good reservoir parameters generally enhanced by fracturing. This reservoir made of pervasive dolomite produce, oil in the nearby Ezzaouia and El Biban fields.

● The shallow marine sandstone of the Upper Jurassic M'Rabtine formation constitute the major reservoir in Ezzaoui oil field.

● The recent discovery of oil within the dolomitic and sandstone facies of the Lower Cretaceous Meloussi formation in the Robbana-1 well on Jerba Island; highlight this reservoir as a promising new target in the block.

● The secondary objectives in the block include the Barremian Sidi Aïch sandstone Formation and The Middle Jurassic Krachoua dolomite.
All this reservoirs are well sealed by the intraformational shales.
 

Source Rocks :
The geochemical data indicate that the oil in the nearby Robbana, Ezzaouia and El Biban productive fields derived from two possible source-rocks: The organic-rich shales interval of the Cenomanian Zebbag Formation and the Callovian organic-rich shales.

Traps :
The main trap types include faulted blocks (three-way dip closure), anticlines and stratigraphic traps.

SEISMIC

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