No fossils are that deep, its literally the lubricant the continents sit on, you can make it with enough unfathomable pressure, wish I had the link to the study

Yes, my only question is how long it take to renew. But there’s nothing magic about, hydrocarbons are hydrocarbons.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC521091/

In a nutshell: Calcium Carbonate, Water, Iron Oxide, heat + pressure make methane. All of these components are available where ocean tectonic plates subduct under continental plates. It is a veritable conveyor belt of materials coming in at these plate boundaries constantly replenishing the "fossil fuels" and natural gas.

In particular, look at the linked study and skip down to the last 2 paragraphs above the acknowledgements:

DISCUSSION We report in situ observations of methane-forming reactions from a model mineral assemblage at the pressures and temperatures of the Earth's upper mantle. The results of our in situ experiments and thermochemical modeling differ markedly from those obtained by quenching (6), which found the yield of methane at 4 GPa from FeO + CaCO3 + H2O was very small at 600°C and below but climbed steadily up to 1,200°C. The previous thermochemical calculations (6) do not pertain to this experimental reactant mixture but rather treat the formation of higher hydrocarbons from an assumed supply of methane.

Methane is expected to form inorganically at mantle pressures and temperatures from any carbonate species, such as FeCO3-siderite or MgCO3-magnesite, in the presence of H2O at oxygen fugacities near the wüstite-magnetite fO2 buffer. Such conditions may be widespread in the mantle and can be moderated by the presence of iron-bearing phases such as Fe2SiO4-fayalite, FeS-troilite, or accessory minerals such as FeCr2O4-chromite and FeTiO3-ilmenite. Indeed, our analysis shows that methane production is thermodynamically favorable under a broad range of high pressure-temperature conditions. The calculations indicate that methane production is most favored at 500°C and pressures <7 GPa; higher temperatures are expected to lead to CO2 and CO production through a reforming equilibrium with methane. The wide pressure–temperature–composition stability field of methane documented here has broad implications for the hydrocarbon budget of the planet and indicates that methane may be a more prevalent carbon-bearing phase in the mantle than previously thought, with implications for the deep hot biosphere (25). In particular, isotopic evidence indicating the prevalence of biogenic hydrocarbons pertains to economically exploited hydrocarbon gas reservoirs, largely in sedimentary basins (2); these observations and analyses do not rule out the potential for large abiogenic reservoirs in the mantle. Moreover, the assumption that CO2 is the sole carrier of mantle-derived noble gasses (26, 27) should be reevaluated. Finally, the potential may exist for the high-pressure formation of heavier hydrocarbons by using mantle-generated methane as a precursor.

Global elite symbolism communication out in the open...fossil findings = oil found without alerting public.