Interprétation géodynamique des configurations sismiques marqueurs événementiels aux applications des systèmes pétroliers dans le bassin de Berkine Est

Abstract

The deepgeological structure of East Basin Berkine has been identified by the use of 2D and 3Dseismic sections. The EasterBerkine Basin has been found as dominated by brittletectonicsfaulting system. It has resulted on blocks which are located in severalregions and amongtheme the mole of Amguid, Tihembouka and evenmore the Illizi Ghadames basins. The presence of horst and grabensrevealed by seismictransectsappear to beinteresting for possible use in understanding the geodynamicevolution and paleogeography of the case study. The reacheddegrees of fracturingintensityresultingfromfaulting are contributing for the flow circulation abilityfacility in the concerned bassin. Reservoiranalysis has pointed out thatdifferentsunitscanbepotentiallycontaininggas and oil. Gross payreservoirs in the Berkin Bassin include : Silurian formation (F6-M2 correspondingsandsontereservoir unit). Sieginien (G) or DevonianInfwithtwounitscharacteried by good petrophysicalcharacteristic15% to 20% and permebilityaround 80 md, Gedinian, DevonianInfwithtwounits (F6) wherepermeability and porosity are relativelylow, Emsian (DevonianInf or Emsian F4) where k isaround 20 md and porosity 7% to 15%, TAGI whichis the main reservoircharacterised by a porosity of 16 percent and permeabiltyaround 3 md Concerning the source rock : It consistsmainly on silurian shale with graptolites in addition to Frasnian shale.