DEVELOPMENT OF OPTICAL METHOD FOR GAS ISOTOPOLOGUE MEASUREMENT AND PALEOTHERMOMETRY BASED ON CONCENTRATION OF METHANE ISOTOPOLOQUE (13CDH3)

摘要

The present invention is directed to the methods of (1) determining natural gas paleotemperature, origin, and maturity by measuring SUP13/SUPCDHSUB3/SUB methane double isotopologues, and (2) optical methods to determine both SUP13/SUPCDHSUB3/SUB andSUP13/SUPCSUP18/SUPOSUP16/SUPO double isotopologues. In addition, the invention is also disclosed a method to determine carbon and hydrogen isotopes in methane, ethane and propane by using a gas chromatography followed by a combustion and optical methods.