ABSTRACT:

The Algerian offshore represents the main southern part of the occidental Mediterranean basin. It extends from east to west over 1200 Km representing an area of 108,122.18 Km2 corresponding to the Alboran basin to the west and the Algero-provencal basin to the east. More than 20000 Km of old exclusive (1968–1977) and about 9000 km of non-exclusive seismic data show a possible petroleum interest relating to the Miocene formations in the western part and the Miocene and Oligocene (Numidian flysh) formations in the eastern part. The Spec-data has been acquired by WesternGeco during 2000 for the eastern part and during 2002 for the western part. In the western basin where only one dip well (4496.5m) and two core drills have been drilled, the onshore geological map reveals the extension toward the offshore of the Chelif basin. The petroleum potential of this onshore basin is of a great interest since the 1940's with the discoveries of Ain Zeft and Tliouanet as oil fields. The hydrocarbon potential interest in the eastern part could be enhanced by the positive discoveries in the Sicilian channel and also by the proved petroleum system of the Numidian in the onshore part in Tunisia and Algeria (Ain Regada). The results obtained from the interpretation of the new seismic lines could enhance the Petroleum's interest of the Algerian offshore.

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