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Abiogenic petroleum origin is an alternative hypothesis to the prevailing theory of biological...

Abiogenic petroleum origin is an alternative hypothesis to the prevailing theory of biological petroleum origin. Most popular in the Soviet Union between the 1950s and 1980s, the abiogenic hypothesis has little support among contemporary petroleum geologists, who argue that abiogenic petroleum does not exist in significant amounts and that there is no indication that an application of the hypothesis is or has ever been of commercial value. The abiogenic hypothesis argues that petroleum was formed from deep carbon deposits, perhaps dating to the formation of the Earth. The presence of methane on Saturn's moon Titan is cited as evidence supporting the formation of hydrocarbons without biology. Supporters of the abiogenic hypothesis suggest that a great deal more petroleum exists on Earth than commonly thought, and that petroleum may originate from carbon-bearing fluids that migrate upward from the mantle. Although the abiogenic hypothesis was accepted by some geologists in the former Soviet Union, most geologists now consider the biogenic formation of petroleum scientifically supported. Although evidence exists for abiogenic formation of methane and hydrocarbon gases within the