A worker walks near a coal hill which is ready to be mined at the Berau district in Indonesia's East Kalimantan province September 26, 2011. The Indonesian energy and minerals ministry has been drafting a rule that by 2014 would require miners to carry out minimum processing on minerals before exporting. Any regulation that is part of a mining and coal law introduced in 2009 requires miners to process coal and minerals into higher-value products before exporting them, as Southeast Asia 's largest economy seeks to boost revenue from the mining sector. Picture taken September 26, 2011. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A worker stands near a coal hill which is ready to be mined at the Berau district in Indonesia's East Kalimantan province September 26, 2011. The Indonesian energy and minerals ministry has been drafting a rule that by 2014 would require miners to carry out minimum processing on minerals before exporting. Any regulation that is part of a mining and coal law introduced in 2009 requires miners to process coal and minerals into higher-value products before exporting them, as Southeast Asia 's largest economy seeks to boost revenue from the mining sector. Picture taken September 26, 2011. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A worker stands near a coal hill which is ready to be mined at the Berau district in Indonesia's East Kalimantan province September 26, 2011. The Indonesian energy and minerals ministry has been drafting a rule that by 2014 would require miners to carry out minimum processing on minerals before exporting. Any regulation that is part of a mining and coal law introduced in 2009 requires miners to process coal and minerals into higher-value products before exporting them, as Southeast Asia 's largest economy seeks to boost revenue from the mining sector. Picture taken September 26, 2011. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

Piles of coal are seen at the Berau district in Indonesia's East Kalimantan province September 26, 2011. The Indonesian energy and minerals ministry has been drafting a rule that by 2014 would require miners to carry out minimum processing on minerals before exporting. Any regulation that is part of a mining and coal law introduced in 2009 requires miners to process coal and minerals into higher-value products before exporting them, as Southeast Asia 's largest economy seeks to boost revenue from the mining sector. Picture taken September 26, 2011. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A truck loads piles of coal at a coal mining site in Berau, Indonesia's East Kalimantan province September 26, 2011. The Indonesian energy and minerals ministry has been drafting a rule that by 2014 would require miners to carry out minimum processing on minerals before exporting. Any regulation that is part of a mining and coal law introduced in 2009 requires miners to process coal and minerals into higher-value products before exporting them, as Southeast Asia 's largest economy seeks to boost revenue from the mining sector. Picture taken September 26, 2011. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A truck loads piles of coal at a coal mining site in Berau, Indonesia's East Kalimantan province September 26, 2011. The Indonesian energy and minerals ministry has been drafting a rule that by 2014 would require miners to carry out minimum processing on minerals before exporting. Any regulation that is part of a mining and coal law introduced in 2009 requires miners to process coal and minerals into higher-value products before exporting them, as Southeast Asia 's largest economy seeks to boost revenue from the mining sector. Picture taken September 26, 2011. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A worker walks near a coal hill which is ready to be mined at the Berau district in Indonesia's East Kalimantan province September 26, 2011. The Indonesian energy and minerals ministry has been drafting a rule that by 2014 would require miners to carry out minimum processing on minerals before exporting. Any regulation that is part of a mining and coal law introduced in 2009 requires miners to process coal and minerals into higher-value products before exporting them, as Southeast Asia 's largest economy seeks to boost revenue from the mining sector. Picture taken September 26, 2011. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

Coal produced by Berau Coal is being loaded onto the Beijing 2008 Monrovia ship in Indonesia's East Kalimantan province August 17, 2010. China's mining and oil companies, including CNOOC and Chinalco, are scouring the world - from Australia to Brazil, and Canada to Indonesia - for takeover targets to secure long-term supply for the world's fastest growing major economy. But the likelihood of Chinese state-owned giants successfully mounting takeovers of major minerals and coal firms in Indonesia, the world's largest exporter of thermal coal and tin, is small. Picture taken August 17, 2010. To match Analysis MINING-INDONESIA/CHINA REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A truck transports coal from Berau Coal, in Berau district in Indonesia's East Kalimantan province August 18, 2010. China's mining and oil companies, including CNOOC and Chinalco, are scouring the world - from Australia to Brazil, and Canada to Indonesia - for takeover targets to secure long-term supply for the world's fastest growing major economy. But the likelihood of Chinese state-owned giants successfully mounting takeovers of major minerals and coal firms in Indonesia, the world's largest exporter of thermal coal and tin, is small. Picture taken August 18, 2010. To match Analysis MINING-INDONESIA/CHINA REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A view of a barge, transporting coal from Berau Coal, in Berau district in Indonesia's East Kalimantan province August 18, 2010. China's mining and oil companies, including CNOOC and Chinalco, are scouring the world - from Australia to Brazil, and Canada to Indonesia - for takeover targets to secure long-term supply for the world's fastest growing major economy. But the likelihood of Chinese state-owned giants successfully mounting takeovers of major minerals and coal firms in Indonesia, the world's largest exporter of thermal coal and tin, is small. Picture taken August 18, 2010. To match Analysis MINING-INDONESIA/CHINA REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A view of a barge, transporting coal from Berau Coal, in Berau district in Indonesia's East Kalimantan province August 18, 2010. China's mining and oil companies, including CNOOC and Chinalco, are scouring the world - from Australia to Brazil, and Canada to Indonesia - for takeover targets to secure long-term supply for the world's fastest growing major economy. But the likelihood of Chinese state-owned giants successfully mounting takeovers of major minerals and coal firms in Indonesia, the world's largest exporter of thermal coal and tin, is small. Picture taken August 18, 2010. To match Analysis MINING-INDONESIA/CHINA REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

Coal produced by Berau Coal is being loaded onto a ship in Indonesia's East Kalimantan province August 17, 2010. China's mining and oil companies, including CNOOC and Chinalco, are scouring the world - from Australia to Brazil, and Canada to Indonesia - for takeover targets to secure long-term supply for the world's fastest growing major economy. But the likelihood of Chinese state-owned giants successfully mounting takeovers of major minerals and coal firms in Indonesia, the world's largest exporter of thermal coal and tin, is small. Picture taken August 17, 2010. To match Analysis MINING-INDONESIA/CHINA REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A barge, transporting coal from Berau Coal, sails during an open-sea transhipment in Berau district in Indonesia's East Kalimantan province August 17, 2010. The coal will be exported to Japan, China and other Asian countries, Berau Coal's spokesman said on Tuesday. Indonesia is the world's biggest thermal coal exporter. Picture taken August 17, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

Coal is being loaded onto a ship in Berau district in Indonesia's East Kalimantan province August 17, 2010. The coal will be exported to Japan, China and other Asian countries, Berau Coal's spokesman said on Tuesday. Indonesia is the world's biggest thermal coal exporter. Picture taken August 17, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A barge, transporting coal from Berau Coal, sails during an open-sea transhipment in Berau district in Indonesia's East Kalimantan province August 17, 2010. The coal will be exported to Japan, China and other Asian countries, Berau Coal's spokesman said on Tuesday. Indonesia is the world's biggest thermal coal exporter. Picture taken August 17, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A barge, transporting coal from Berau Coal, sail during an open-sea transhipment in Berau district in Indonesia's East Kalimantan province August 17, 2010. The coal will be exported to Japan, China and other Asian countries, Berau Coal's spokesman said on Tuesday. Indonesia is the world's biggest thermal coal exporter. Picture taken August 17, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A controlled explosion is seen at a coal mining site in preparation for mining activities at a coal mine in Berau district at the Indonesia's East Kalimantan province August 15, 2010. Picture taken August 15, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A worker walks near a coal hill which is ready to be mined at the Berau district in Indonesia's East Kalimantan province August 15, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A worker walks near a coal hill which is ready to be mined at the Berau district in Indonesia's East Kalimantan province August 15, 2010. REUTERS/Yusuf Ahmad (INDONESIA)

A truck is loaded with piles of coal at a coal mining site in Berau, in Indonesia's East Kalimantan province August 12, 2010. Indonesia's coal output may fall by 6.25 percent this year to 300 million tonnes, from an earlier forecast of 320 million tonnes, if unseasonal rains persist until the end of the year, Bob Kamandanu, chairman of the Indonesian Coal Mining Association said on Friday. Picture taken August 12, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

Trucks load piles of coal at a coal mining site in Berau, in Indonesia's East Kalimantan province August 12, 2010. Indonesia's coal output may fall by 6.25 percent this year to 300 million tonnes, from an earlier forecast of 320 million tonnes, if unseasonal rains persist until the end of the year, Bob Kamandanu, chairman of the Indonesian Coal Mining Association said on Friday. Picture taken August 12, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

Coal mining activity is seen at a mining site in Berau, in Indonesia's East Kalimantan province August 12, 2010. Indonesia's coal output may fall by 6.25 percent this year to 300 million tonnes, from an earlier forecast of 320 million tonnes, if unseasonal rains persist until the end of the year, Bob Kamandanu, chairman of the Indonesian Coal Mining Association said on Friday. Picture taken August 12, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A truck transports coal at a mining site in Berau, in Indonesia's East Kalimantan province August 12, 2010. Indonesia's coal output may fall by 6.25 percent this year to 300 million tonnes, from an earlier forecast of 320 million tonnes, if unseasonal rains persist until the end of the year, Bob Kamandanu, chairman of the Indonesian Coal Mining Association said on Friday. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS TRANSPORT)

A worker uses his walkie-talkie as he walks in front of a coal pile at a mining site in Berau, in Indonesia's East Kalimantan province August 12, 2010. Indonesia's coal output may fall by 6.25 percent this year to 300 million tonnes, from an earlier forecast of 320 million tonnes, if unseasonal rains persist until the end of the year, Bob Kamandanu, chairman of the Indonesian Coal Mining Association said on Friday. Picture taken August 12, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A worker walks in front of a coal pile at a mining site in Berau, in Indonesia's East Kalimantan province August 12, 2010. Indonesia's coal output may fall by 6.25 percent this year to 300 million tonnes, from an earlier forecast of 320 million tonnes, if unseasonal rains persist until the end of the year, Bob Kamandanu, chairman of the Indonesian Coal Mining Association said on Friday. Picture taken August 12, 2010. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)

A worker walks through a coal pile at a mining site in Berau at the Indonesia's East Kalimantan province August 12, 2010. Indonesia's coal output may fall by 6.25 percent this year to 300 million tonnes, from an earlier forecast of 320 million tonnes, if unseasonal rains persist until the end of the year, Bob Kamandanu, chairman of the Indonesian Coal Mining Association said on Friday. REUTERS/Yusuf Ahmad (INDONESIA - Tags: ENERGY BUSINESS)