Petroleum

Proven world oil reserves, 2013. Unconventional reservoirs such as natural heavy oil and oil sands are included.

Petroleum (L. petroleum, from early 15c. "petroleum, rock oil" (mid-14c. in Anglo-French), from Medieval Latin petroleum, from Latin:petra: "rock" + oleum: "oil".) is a naturally occurring, yellow-to-black liquid found in geological formations beneath the Earth's surface, which is commonly refined into various types of fuels.

单词	Petroleum accumulation
释义	Petroleum accumulation 英语百科 Petroleum Petroleum (L. petroleum, from early 15c. "petroleum, rock oil" (mid-14c. in Anglo-French), from Medieval Latin petroleum, from Latin:petra: "rock" + oleum: "oil".) is a naturally occurring, yellow-to-black liquid found in geological formations beneath the Earth's surface, which is commonly refined into various types of fuels.
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Petroleum accumulation

Petroleum