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Table 5 Chemical and stable isotopic composition of the gas retrieved from Satigny

From: Origins of hydrocarbons in the Geneva Basin: insights from oil, gas and source rock organic geochemistry

Components Units SAT1 SAT2 SAT1 SAT2 Hydrocarbons
   (100 µl) (200 µl) (average)–
CO (Vol%) 0 0    
CO2 (Vol%) 0 0    
O2 + Ar (Vol%) 3.16 4.09
Nitrogen (Vol%) 11.55 14.86
     vol. % in 100 μL vol. % in 200 μL % C1–C6
Methane (ppm) 2660 6114 53.2 61.14 98.87
Ethane (ppm) 14.8 34.5 0.3 0.35 0.55
Propane (ppm) 6.5 14.7 0.13 0.15 0.24
i-Butane (ppm) 4.9 11.2 0.1 0.11 0.18
n-Butane (ppm) 1.6 3.7 0.03 0.04 0.06
i-Pentane (ppm) 1.1 2.6 0.02 0.03 0.04
n-Pentane (ppm) 0 0.6 0 0.01 0.00
i-Hexane (ppm) 1.5 1.6 0.03 0.02 0.04
n-Hexane (ppm) 0.4 0.5 0.01 0.01 0.01
C1/(C2 + C3)   125 124   
δ13C-CH4 (‰ VPDB) − 52.5   
δ13C-C2H6 (‰ VPDB) − 23.5   
δ13C-C3H8 (‰ VPDB) − 21.4   
δ2H-CH4 (‰ SMOW) − 231