Non-hydrocarbon constituents of natural gas are the resoures extracted non-hydrocarbon gases, as well as the important indexes as being prospected for hydrocarbon and researched in nature. This paper makes a systematic study on developments in Geochemistry (Occurrence, distribution, origin, isotopic geochemistry, etc.) of non-hydrocarbon constixuents (CO2,H2S,N2,He,Ar,H2,H2O and Hg) of natural gas. Finally, the author charts the fields needed strengthen study in China.
(1)Thermal dynamics of the non-hydrocarbon constituents in the Earth fluid system;
(2)Contribution from the gas to the metal deposits;
(3)Relation between non-hydrocarbon gases and petroleum;
(4)Geological geochemistry of non-hydrocarbon constituents;
(5)Global climate change and outgassing of solid Earth;
(6)Relationship between methane hydrate in shallow crust and non-hydrocarbon gases contents in the atmosphere.