诡秘外国网友评论节选意译 - 【1108-1116】【含本章说】(42)

但问题是，作者显然是个科学，生物，物理，化学还有数学的爱好者。如果你看过他的奥术王座的话，也就是作者的第一本书，那本书基本上在前100章内全都是和科学有关的东西。所以唯独石油这种物质消失了，但煤炭和天然气还存在，这种现象绝对是故意的。我只是不清楚具体的原因到底是什么23333
（回复楼上上）Sinfish
In general, coal will never turn into oil, and oil will never turn into coal, but they both will turn into natural gas given sufficient heat, pressure, and time.
Oil is pretty much exclusively formed fairly deep, but not too deep underwater and is made of creatures in marine sediments.
It requires sufficient life which isn't found in deep ocean, but also requires anoxic environments which can't be found in shallow water.

Oil being found on land is all land that was formerly underwater.
Coal but no oil might suggest a lack of tectonic activity in this world preventing coasts from significantly shifting. Or perhaps a lifeform eats oil, or even some sort of cthulhu monstrosity is consuming it.
Plus, it may be that oil exists, but for some reason it can't get close enough to the surface to be exploited by their level of industrial-age technogy.
一般来说，煤炭是永远也不可能变成石油的，石油也永远不可能变成煤炭，但它们都可以在一定的热量，压力和时间条件下变成天然气。