Caractérisation des paléoenvironnements des calcaires aptiens des Dj. Bou Arif, Dj. Fedjoudj, et Dj. Tarf et Potentialités en hydrocarbures.

Abstract

The study area match the Atlas area surrounded to the north by immigrant area and south by the area parautochtone. The whole part of the margin of the African plate to which the Alpine tectonics plays a crucial role in setting up different structures. Its structural evolution is related to tectonic events succeeding in the time since the end of the Paleozoic until today. The terrain encountered in the study area are generally of Meso-Cenozoic age, consisting essentially of marine facies carbonate clay interspersed occasionally by clay and sandstone deposits, corresponding to the Neocomian, Barremian and Albian and lower Miocene. On the sedimentological level, the limestones of the Aptian at the series of massive, Dj. Fedjoudj, Bou Arif and Dj Tarf part in internal domain subtidal to intertidal facies in the majority depends on a complex barrier, generally characterized by oolitic facies. This is usually sought when mainly be a barrier reef area and because of their petrophysical characteristic. On the tectonic map, different structures are represented by structures of Atlas plicatives direction (NE-SW) and the compartmentalized Timgad basin south. The hydrocarbon potential map and the data areas (geological and geophysical) surrounding and by correlation with the sedimentological context of the region, the Aptian age limestone could be a real tank. The interest in the study of Oolitic deposits along the barrier complex is the result of discoveries of oil in many parts of the world.