NOVELTY - Method for biogenic production of hydrogen-carbon containing fluid from hydrocarbon containing formation, involves providing or stimulating in the formation an anaerobic microorganism consortium containing one or more enzymes to activate a starting aromatic hydrocarbon or starting alkane by an addition of a chemical group to the starting aromatic hydrocarbon or starting alkane, and converting the activated aromatic hydrocarbon into the hydrogen-carbon containing fluid through one or more intermediate hydrocarbons, and recovering the fluid.    USE - Method for biogenic production of a hydrogen-carbon containing fluid containing alcohol, organic acid or methane from hydrocarbon containing formation (claimed), e.g. oil, coal, kerogen, peat, lignite, oil shale, and tar.    DETAILED DESCRIPTION - Method for biogenic production of a hydrogen-carbon containing fluid from a hydrocarbon containing formation, involves (a) providing or stimulating in the formation an anaerobic microorganism consortium containing one or more enzymes to activate a starting aromatic hydrocarbon or starting alkane by an addition of a chemical group to the starting aromatic hydrocarbon or starting alkane, and converting the activated aromatic hydrocarbon into the hydrogen-carbon containing fluid through one or more intermediate hydrocarbons, and recovering the hydrogen-carbon containing fluid from the formation; or (b) identifying a gene encoding a target enzyme in an anaerobic enzymatic pathway to convert a starting hydrocarbon into the hydrocarbon-carbon containing fluid, providing a microorganism containing the identified gene to an anaerobic microorganism consortium, where the consortium contains one or more enzymes to activate the starting hydrocarbon into an activated hydrocarbon by an addition of a chemical group to the starting hydrocarbon, and converting the activated hydrocarbon into the hydrogen-carbon containing fluid through one or more intermediate hydrocarbons, and recovering the hydrogen-carbon containing fluid from the formation.