BIOMARKER CHARACTERIZATION OF EOCENE CRUDE OILS FROM CAMBAY BASIN UTILIZING COMPREHENSIVE GCXGC-TOFMS
S. Kumar and S. Dutta
Event name: 29th International Meeting on Organic Geochemistry
Session: Posters - Petroleum Biomarkers
Publication date: 04 September 2019
Info: Extended abstract, PDF ( 195.59Kb )
Comprehensive two-dimensional gas chromatography in a series with time-of-flight mass spectrometer is a robust instrument in the field of gas chromatography. It is a relevant approach for the elucidating the detailed molecular composition of crude oil samples. A suite of Eocene crude oils belonging to Cambay Basin was chosen to understand source, depositional environment and thermal maturity parameters based on precise assessment biomarkers. Besides the dominance of n-alkanes and acyclic isoprenoids, the fractions also comprise of bicyclic sesquiterpanes, tricyclic terpanes, tetracyclic terpanes, pentacyclic terpanes and steroids as well as their isomers. Peculiar markers of angiosperm-derived triterpenoids (oleanane, bicadianane, secobicadinanes and oleanane derived aromatics) have also been positively detected, possibly due to the high sensitivity and resolution of GCXGC. The results reveal that organic matter was deposited in a sub-oxic environment and there is a substantial contribution of angiosperm to the precursor biomass.