The Semberah TAC covers a small onshore area in east Kalimantan. The licence allows only for exploitation of the shallow reservoirs of the Semberah field to a depth of 1,220 metres. The deeper reservoirs are operated by VICO as part of its Sanga Sanga PSC. Oil production started in May 2004, and first gas deliveries to PLN were made in June 2007. Gas sales were also made to VICO, the operator of the neighbouring Sanga Sanga PSC, during 2008 and 2009.