The Cercina fields lie in shallow water on the western side of the Kerkennah Islands, 32 kilometres from Tunisia's second city of Sfax. The fields are operated by TPS, a 50/50 JV between OMV and ETAP. Production began in 1994 and at peak averaged just above 2,000 b/d from a facility that has a capacity of 10,000 b/d. A subsequent exploration and development programme began in 2002, proving up further reserves although the field has long since re-entered a natural decline. OMV plans to workover several of the wells to boost production but there have been delays.