求翻译：随着已经探明储量的增加，特别是OPEC国家石油储量的增加，世界石油储量近20年来保持持续增加的态势。这在一定程度上减少了人们对未来石油消耗殆尽的担忧，促进了石油消费的提高，有助于推高石油价格。然而，据IEA（国际能源署）估计，现在低成本的大油田基本上都己被发现，目前开采的石油的产量己近极限，世界石油产量将在2015年以前达到顶峰，在石油产量递减之后，原油产量和供应量能否满足不断增长的石油需求尚存疑问，长期而言，石油需求而非石油供给将成为决定石油价格的主导因素。是什么意思？

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As has already been proved oil reserves of the increase, particularly in OPEC national oil reserves, the world's oil reserves in the past 20 years with a continuous increase in the trend. To a certain extent, this reduction in oil consumption in the future out of concern that the oil consumption of

Along with already the proven reserves increase, specially the OPEC country prospective oil increase, world oil reserves in the recent 20 years maintained the situation which increased continually.This reduced the people to a certain extent to future petroleum consumption danger completely worrying,

As has proven reserves of increase, increase petroleum reserves in OPEC countries in particular, the world oil reserves continue to increase in the past 20 years. It reduces people to a certain extent on the future oil depletion concerns, promote oil consumption increased, helped push up oil prices.

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