And I suggest you look up the modern Russian-Ukrainian theory of deep abiotic petroleum origin. You might also look up "mantle" (no biological molecule can survive in the mantle), "serpentization", "serpentine plugs", "Travis volcanic mounds", "solfataric volcanoes", and " methane cryo-volcanoes".
Strawman - none of this is actually relevant to my initial point.
The claim 'no biological molecule can survive the mantle' is irrlevant to the claim 'carboxylic acids become alkanes on heating'.
Serpentine is a secondary mineral (an oxidation product) of minerals including olivine, and orthopyroxine, and typically occurs in serpentites (altered olive bearing rocks - simply (potentialy) indicating hydrothermal activity after vulcanism. This has nothing (directly) to do with the production of oil, except for implying a heat source.
Travis volcanic mounds are seamounts that erupted in the cretaceous, and now have oil in the sedimentary layers associated with them, and because of their structure have a high potential to trap oil, and they happen to have serpentite plugs associated with them (Hmmm Marine sedmients + Hydrothermal activity (heat) + burial).
Sulfataric volcano refers to a specific type of gas driven activity, that as well as producing the usual volatiles, produces sulfur - essentially similar to fumarolic activity. Although, I see from your blog that you've managed to convince yourself that because 'explosive' is used as an adjective, methane must be present.
Methane cryovolcanism is irrelevant - it doesn't occur on earth.
None of your points have anything to do with my assertion that it's possible to produce alkanes by the decarboxylation of fatty acids.
