石油沉睡在几百至几千米的地层中,开采时除得到液体石油外,还可得到大量石油气(正常称为油田气或油田伴生气),一般每采一吨油可伴有几十至几百立方米的油田气。若采出的只有气体则称为天然气. 天然气的主要成分是甲烷。甲烷是一种无色、无臭的气体,在煤油灯嘴上燃烧时很平缓,发 Oil sleeping in the formations of hundreds to thousands of kilometers, mining in addition to get liquid petroleum, but also get a lot of LPG (commonly known as oil gas or oilfield associated gas), generally each mining a ton of oil can be accompanied by dozens Oil gas to hundreds of cubic meters. If only the gas produced is called natural gas, the main component of natural gas is methane. Methane is a colorless, odorless gas that burns gently on kerosene nozzles