Gas while Drilling Improves Formation Evaluation in Tight Reservoir, Southern Tunisia

T041 GAS WHILE DRILLING IMPROVES FORMATION EVALUATION IN TIGHT RESERVOIR – SOUTHERN TUNISIA Abstract Introduction 1 C. CARUGO 1 V. CHELINI 2 and SAMIR EL MANAA 3 1 ENI E&P Division via Emilia 1 S.Donato Milanese Italy The Palaeozoic Acacus (Silurian) formation represents one of the main drilling target in the southern Tunisia. This formation can be divided into three members conventionally named A B and C from the deepest to the shallowest. These members consist of interbedding shales siltites and fine sandy levels organised in sequences coarsening-upwards and are deposited in a shallow water marine environment. Many facies are