The additional gas supply would enable the country to reduce electricity subsidy by Rp5 trillion in 2012, deputy for operations control to BP Migas chief Rudi Rubiandini said here on Sunday.
"The gas supply of 105 BBTUD is equal to an electrical power of 400-500 megawatts so it can reduce electricity subsidy by around Rp5 trillion in 2012," he said.
He said 20 BBUTD of the additional gas supply would result from a swap with Jambi Merang field operated by JOB PHE-Talisman which had so far supplied gas to state gas company PT Perusahaan Gas Negara (PGN) Tbk.
He said 40 BBUTD would come from ConocoPhillips as a result of swap with Gajah Baru field operated by Premier Oil and 45 BBUTD from the Suban field operated by ConocoPhillips.
Rudi said the scenario was made to allow PLN to get gas supplies without disrupting supplies to PGN for industries.
Earlier, Head of PLN Fuel Oil and Gas Division Suryadi Mardjoeki said he was worried about gas supply from Jambi Merang Field under a swap scheme.
He said the additional gas supply under a swap scheme would not come from the reduction of ConocoPhillips` gas supplies to PT Chevron Pacific Indonesia but from PGN.
"This has never been disclosed at discussion on the swap," he said.
PLN had written to BP Migas asking for the reduction of ConocoPhillips` gas supplies to Chevron or to Singapore, he said.