Sustained oil prices above $100 (Dh367) could further heighten tensions over control of the South China Sea, as Vietnam, China and other Asian nations look to stake their claim on potential untapped energy resources and reduce their dependence on costly imports.
Brent oil prices briefly rose above $127 a barrel in April of this year, the highest since 2008 just before the start of the financial crisis, and sustained levels above $100 were reached in late January on an evolving combination of recovering global demand and reduced supplies caused by unrest in Libya.
A move by the IEA in June for developed nations to release oil stocks to tame prices only led to a temporary price drop, to $102.28 on June 27. Brent was hovering under $117 Tuesday.
While oil prices are notoriously volatile, key market analysts see Brent well above $100 a barrel through 2012 and a growing global supply and demand gap, factors that make potential oil discoveries in the South China Sea increasingly attractive for countries claiming sovereignty, analysts said.
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"The high oil price is a major driver in this. China needs access to oil and gas to reduce their dependency on overseas supplies, which presents a strategic vulnerability," said Ian Storey, a fellow at the Singapore Institute of Southeast Asian Studies.
"This is partly why tensions have been rising over the last two to three years because the Chinese feel the other claimants — particularly Vietnam, Malaysia and the Philippines — have been unilaterally plundering natural resources that really belong to them."
China has made the largest claim over the area, and Taiwan, Vietnam, Brunei, Malaysia and the Philippines also assert territorial sovereignty, which covers one of the world's busiest sea lanes and also provides rich fishing opportunities.
Except Taiwan, all other non-Chinese claimants are members of the ten-nation Association of South East Asian Nations (Asean), which will be holding the region's biggest security forum this week.
The meeting at the Indonesian resort island of Bali is expected to focus on the South China Sea dispute and China's perceived muscle-flexing there.
Estimates for proven and undiscovered oil reserves in the South China Sea range from 28 billion to as high as 213 billion barrels of oil, the US Energy Information Administration (EIA) said in March 2008.
The most optimistic outlook would be the equivalent to around 60 years of current Chinese demand.
"The Chinese refer to the South China Sea as the new Saudi Arabia or the El Dorado of oil. But I think that their claims of oil and gas reserves are widely optimistic," Storey said.
The US Geological Survey last year estimated a 50 per cent chance that the area would hold at least 10.25 billion barrels of undiscovered oil, with most of it near the Spratly islands.
For gas, the South China Sea is seen as even more promising with 60 to 70 per cent of the area's hydrocarbons believed to be natural gas.
The US Geological Survey estimated a 50 per cent chance of at least 3.79 trillion cubic metres of undiscovered conventional gas, equivalent to more than 30 years of current Chinese consumption.
Experts warn, however, that any estimate is largely an educated guess and will continue to be until more exploration takes place.
"In the oil business, there is potential everywhere in the world. Until you go there to drill a hole and make it proven, you really can't say anything," said Kang Wu, managing director of consultancy Facts Global Energy.
"Potential resources and proven reserves are two totally different concepts."
With some Southeast Asian fields already on the decline, pressure to explore for new discoveries deeper into the South China Sea has surged, increasing the likelihood of confrontations over sovereignty rights.