That Russian paper was shredded by peer review. The isotopic ratios were all in line with having been in contact with the biosphere. Later when the technology progressed geochemical markers were proven to be biological as well. Yes I am a PhD petroleum geologist and have done geochemistry for more than two decades it made me a wealthy man. Liquid hydrocarbons are of biological origin. Primarily marine algae the signatures are conclusive, a smaller set is fresh water algae and diatoms or marine diatoms you can see the silica remains in thin sections in micrographs of source shales. A very small set of liquid hydrocarbons are from deltaic coaly sources those require very specific anaerobic conditions to have existed and the signatures are strong and unique. A single Soviet paper that was utterly debunked and shredded does not make for a ocean of mythical abiotic total hydrocarbon systems it just doesn’t.
Explain Titan. See my post above yours.
I’ll take your word for it. LoL.