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Nick Mahlstedt, GEOS4´s Senior Technical Officer, talked about "Impact of Expulsion and Production Fractionation on Petroleum Composition: Novel Insights from Polar Compounds Geochemistry" at the 31st International Meeting on Organic Geochemistry (IMOG), September 2023, Montpellier, France.

High resolution mass spectrometric analysis (FT-ICR MS) in both ESI (-) and APPI (+) modes was employed to gain insights into the impact of fractionation on liquid composition during petroleum expulsion and production. 45 mid- to late oil window mature fluids from 6 major unconventional resource plays in the US were analyzed. This study reveals that polarity and aromaticity play a more important role in compositional fractionation than does molecular weight during migration and production, at least in the heavy ends of medium gravity petroleum liquids, directly impacting production efficacies.

Mahlstedt, N., Horsfield, B., Michael, E., Song, Y., Tobey, M., Mangelsdorf, K. (2023) Impact of Expulsion and Production Fractionation on Petroleum Composition: Novel Insights from Polar Compounds Geochemistry. https://doi.org/10.3997/2214-4609.202333146.