Advance Energy Plc, formerly Andalas Energy and Power Plc, is an oil and gas exploration and production company with conventional upstream assets across Indonesia and the United Kingdom. The Company has an agreement with PT Petroenim Betun-Selo, the operator of the Betun-Selo KSO in Sumatra, Indonesia. The Betun-Selo KSO has two fields: the Betun field and the Selo field. Both fields are located in South Sumatra. The Betun field is approximately 30 kilometer (km) north-northwest (NNW) of Prabumulih, and the Selo field is approximately 60 km west-north-west (WNW) of Prabumulih. The Company also holds licenses P1918, PEDL330 and PEDL345, which contains the Purbeck Prospect.