It is energetically feasible for hydrocarbons to be synthesized from dissolved carbon dioxide and hydrogen under appropriate hydrothermal conditions. Hydrocarbons formed this way may contribute to oil and gas accumulation and provide the precursor organic compounds for the origin and evolution of life on the early earth. It is reported that the formation of hydrocarbons will be hampered for kinetic reasons, and CH₄ and C₂H₆, C₃H₈ may produced from CO₂ and H₂ catalyzed by awaruite and chromite under hydrothermal conditions. More research work is needed to confirm whether there are some natural minerals which can catalysis dissolved carbon dioxide and hydrogen to produce C₄H₁₀ and other longer chain hydrocarbons. Magnetite that bears one or more other transitional metal elements may be potential. It is also needed to reveal the mechanism of the reaction and the C, H isotope fractions in this process, which may be useful to establish a criterion for discriminating the abiotic hydrocarbons formed from CO₂ and H₂ from those originated from organic matter under hydrothermal conditions.