As the companion of oil, the generation conditions of natural gas are more diversified than that of oil. Oil can be generated in large quantities only when it reaches a certain burial depth, while natural gas can be generated from shallow to deep.Shallow ones may be only a few hundred meters deep and tens of thousands of meters deep. In terms of material sources, it is said that they are mainly organic matter of animals and plants in a water, while natural gas can be organic, organic matrix, and so on.At present, the vast majority of transfers in the geological scientific community are in favor of the organic theory that oil and natural gas are transformed from various organisms that died in ancient times.
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Oil is mostly converted from aquatic organisms