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P15 ABSTRACT 1 AVO CASE STUDY IN THE ILLIZI BASIN – ALGERIA A. BELLAHCENE * * Sonatrach - Division Exploration - Boumerdes - 35000 Algeria. E-mail : [email protected] Introduction and objectives The application of amplitude variation with offset (AVO) to prestack reflection data has proved to be very useful in identifying hydrocarbons accumulations in various other basins in the world. The Illizi basin was selected for a first application of the AVO method. In this basin in the region of Hassi-Tabtab two geologically similar prospects resulted in a gas discovery and a dry hole. The object of this work is