The Bir Abdallah block is located onshore southern Tunisia, within a confirmed hydrocarbon provinces surrounding by El Borma, Debbech, Cherouq, Adam, Durra, Anaguid Est, Makhrouga, Sanhar and Djebel Grouz Fields.
The BIR ABDALLAH block is located in the Saharan platform, within the Ghadames Basin. This later corresponds to a sag basin characterized by Paleozoic strata dipping gently towards the South and truncated by the Hercynian Unconformity.
Reservoirs and Seals
- The Triassic TAGI fluvial sandstones are considered as a primary target in the western part of the block. This reservoir is an oil and gas producer in El Borma, Sanhar, Makhrouga, Debech and Jebel Grouz fields.
- Shales and anhydrites above the TAGI reservoir provide excellent seal capacity.
- The Silurian Acacus sandstones are considered as a primary target in the eastern part of the block. This reservoir is oil and gas producing in Oued Zar /Hammouda, Adam, Cherouq, Larich, Durra and Anaguid East. It’s also oil producing in the El HAMRA and TIGI Libyan fields.
- The Lower to Middle Ordovician fractured sandstones and quartzites are considered as a secondary target within the block. These reservoirs are oil, condensate or gas bearing in Larich/Oued Zar, Durra and Chaabet El Mercanti fields.
- The proven mature source rocks known in the area are the Silurian Tannezuft “hot shale” and the Devonian Aouinet Ouienine black shale.
- The trapping system in the zone includes tilted fault blocks, low amplitude anticlines, flower structures and stratigraphic traps (pinch-out, channel fill, unconformities). Combination tarps also exist.