大家知道,岩层是弯曲的,象石化了的波浪一样;这样的褶皱可能有些读者已经在山坡上或者在河岸上见过了。如果在砂岩层或石灰岩层底下有石油、瓦斯和水,那么这些东西由于此重不同,就会分布在褶皱的不同部位。瓦斯充填在岩层的顶部,它下面是石油,再下面是水。因此,油田的形状就象一个特别的“山”,在顶部和两翼含着“黑色的金子”,而在底部充满着水。 As we all know, rock formations are curved, like petrified waves; such folds may have been read by some readers on the slopes or on banks of rivers. If there is oil, gas and water under the sandstone or limestone, these things will be distributed in different parts of the fold due to this difference. Gas filled in the top of the rock, it is below the oil, then below the water. So the shape of the oil field is like a special “mountain” with “black gold” on the top and two wings and water on the bottom.