Reservoirs :
The primary reservoirs are the Upper Senonian
Abiod chalky limestones and Aptian Serdj carbonates. Secondary
targets include the Mid-Miocene Ain Grab and Oligocene Ketatna
bioclastic limestones, Mid-Albian Allam limestones and Jurassic
Nara dolomites. Most of these reservoirs tested oil and gas or
gave oil and gas shows in the wells drilled within the block
and in the adjacent area.
Source Rocks :
The Albian Fahdene shales and limestones provide
the primary potential source in the area. Further potential is
provided by the Mid-Cretaceous Aleg argillaceous limestones and
Jurassic middle Nara black shales. The presence of gas shows in
Alfil#1 well and an oil column in the Halk El Menzel field,
immediately west of the block, clearly indicates that source
rocks are being mature.
Traps :
They are dominated by fault blocks in addition to low amplitude
anticlines initiated since the Mid-Cretaceous. Numerous
prospects are identified and awaiting to be drilled.
GEOGRAPHICAL
SETTING