Replies to post #18746 on The Rising Influence of Rising Affluence

[semi_infinite]

Mozambique - The two samples that showed significant N2 looks like air contamination to me. Without those 2 samples, N2 average looks de minimis, like most other dry NG.

[flatlander_60048]

CO2 is much more soluble than methane. Water washing or decomposition of source material in the presence of water can strip the CO2 from a biogenic gas. Isotope plots of C13 v deuterium would help assess the source and the subsequent diagenesis. I agree that the N2 is probably sample contamination.

Good to stumble onto a good geochemical discussion.

FL