Abstract:

Abstract:  Water widely exists in the deep Earth interior. Owing to high temperature and high pressure, it presents many unique physical and chemical properties, and it is of great significance in abiotic formation of hydrocarbons and in their migration. The generation of H2 or O2 resulted from the reaction of water with inorganic mineral has great impact on the equilibrium of COH fluid, which plays an important role in the origination and stability of hydrocarbons in the deep earth. The hydrothermal fluids not only provide excellent solvent for organic reactions, but also participate in the reaction with carbonates or metal carbide to generate hydrocarbons. FischerTropsch synthesis is an important mechanism for prebiotic origin of organic compounds and hydrothermal organic geochemical reaction. The main source of H2 to FischerTropsch reaction is generated from the reaction of mineral with water, which is the important way of abiotic formation of hydrocarbons.

Key words:

Key words: water in the deep Earth interior; high temperature and high pressure; abiotic hydrocarbon formation