The AAPG/Datapages Combined Publications Database

AAPG Bulletin


AAPG Bulletin; Year: 2020; Issue: June
DOI: 10.1306/0122201618217407

Return to Full Text

Figure 13. Plot of n-heptane/naphthenic heptanes (heptane ratio) versus [(2-methylhexane + 3-methylhexane)/(1cis3-dimethylcyclopentane + 1trans 3-dimethylcyclopentane + 1trans 2-dimethylcyclopentane)] (isoheptane ratios) of oil samples from the different areas of Niger Delta showing the source kerogen type. The oil samples appear to be mainly from type II and mixtures of type II and III kerogens. Note the absence of indications of any pure type III kerogens. Interpretation overlay from Integrated Geochemical Interpretation 3.5 software (modified after Thompson, 1983). Solid lines show the kerogen trends, while dotted lines show biodegradation trends.

Return to Full Text