"

 Abiogenic origin 

 I see a discussion tag on this section, but no discussion. I agree that the section lends undue weight  to this idea for such an overview article as this. I suggest keeping the first paragraph of the subsection and adding a simplified version of the first sentence of the second to the end of it, viz, ""The abiogenic origin hypothesis has little support among modern petroleum geologists.[25]"" Are there any objections to this plan?   "