Premier Oil plc announced the successful completion of the first part of the Zama appraisal programme. Highlights: 152 metres of net pay encountered above the oil water contact (OWC) as expected. 73% Net-to-Gross ratio, higher than that at Zama-1 and ahead of pre-drill estimates. Reservoir quality similar to that at Zama-1 as predicted. Zama-2 well will now be side-tracked up-dip and flow tested as planned. The Zama-2 appraisal well was drilled 2.1 kilometres to the north of the Zama-1 discovery well in a down dip location with a key objective to confirm the OWC. The well encountered the top Zama reservoir at 3,279 metres (true vertical depth (TVD)) on prognosis and the OWC at 3,430 metres TVD, consistent with the flat-spot observed on seismic. A full wireline data acquisition programme was undertaken, including the collection of cores, pressures and fluid samples from the oil and water leg. The Zama-2 well will now be side-tracked (Zama-2ST1) updip and will include a comprehensive coring programme as well as a drill stem test of the Zama reservoir. The programme is progressing ahead of schedule and is currently under budget. Further updates will be provided as key activities are completed.