Production fractionation- polars
This is done using ultra-high resolution mass spectometry.
Insights into movable versus non-movable oil within, and in fluids produced from, shales and/or expulsion efficiencies in different shale plays.
Samples (10g rock, 1ml fluid)
Shale source and reservoir intervals, produced fluids.
- Fourier Transform-Ion Cyclotron Resonance-Mass Spectrometry (FT-ICR-MS) to characterise low and very high molecular weight polars (resins and asphaltenes) in whole oils and whole rock extracts.
- Electrospray ESI(-) mode ionises acidic NSO-compounds.
- Atmospheric pressure photoionization APPI(+) mode is sensitive to aromatic components having either basic (e.g. pyridines, ketones) or acidic features.
No Black Boxes -> read 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 compound geochemistry. 31st IMOG, Montpellier, France (abstract).
Link to the abstract. Request a copy of the article.