Eight different samples of various locations have been analysed during the practical course. The
samples consisted of two source rock samples (Kimmeridge Clay and Blue Lias), two oil sands
(Wealden oil sand and Osmington Mills oil sand) and four oil samples including Libya oil, R828, Iraq
oil (09_205) and Schwedeneck. The Kimmeridge Clay represents an immature source rock with very
good potential. The Blue Lias source rock, kerogen type II, shows the same conditions as the
Kimmeridge Clay. The other Kimmeridge Clay sample kimsrf 1 indicates kerogen type I. The Wealden
oil sand shows intense biodegradation and plots in the area of a type II kerogen. The Osmington Mills
oil sand plots in type I kerogen area, and also shows intense biodegradation. The Libya oil is
comprised of a type II/III kerogen, similar to the R828 oil sample which additionally shows oxidizing
marine conditions. Iraq oil plots in the area of a type II kerogen and was deposited under marine
hypersaline conditions. The last sample, the Schwedeneck oil, was deposited under rather oxidizing
conditions and sterane analysis suggests an early oil window stage.
Inhaltsverzeichnis
- Petroleum Geochemistry
- Summary
- Introduction
- Results and Discussion
- TOC
- Rock Eval
- Bitumen Extraction
- Asphaltene Precipitation
- IATROSCAN (TLC-FID analysis)
- GC
- GC-MS
- Conclusion
- References
- Experimental Procedures
- APPENDIX
Zielsetzung und Themenschwerpunkte
The laboratory course "Petroleum Geochemistry" aimed to assess the kerogen type, depositional environment, maturity, and petroleum potential of source rock and oil sand samples using standard geochemical screening and characterization methods. The experimental procedures were based on the Norwegian Industry Guide to Organic Geochemical Analyses (NIGOGA).
- Assessment of kerogen type
- Determination of depositional environment
- Evaluation of maturity
- Analysis of petroleum potential
- Application of standard geochemical methods
Zusammenfassung der Kapitel
The practical course analyzed eight different samples from various locations, including two source rock samples (Kimmeridge Clay and Blue Lias), two oil sands (Wealden oil sand and Osmington Mills oil sand), and four oil samples (Libya oil, R828, Iraq oil, and Schwedeneck). The Kimmeridge Clay represents an immature source rock with very good potential, while the Blue Lias source rock shows similar conditions. The Wealden oil sand exhibits intense biodegradation, while the Osmington Mills oil sand shows intense biodegradation and plots in the type I kerogen area. The Libya oil is comprised of a type II/III kerogen, similar to the R828 oil sample. The Iraq oil plots in the area of a type II kerogen and was deposited under marine hypersaline conditions. The Schwedeneck oil was deposited under oxidizing conditions, suggesting an early oil window stage.
The TOC results of the samples vary between the Lyme Regis (Blue Lias), Kimmeridge Clay, and oil sand samples. The Lyme Regis sample has a remarkably high TOC content, while the Kimmeridge Clay source rock shows a high TOC result but a lower value than the Lyme Regis source rock. The Osmington Mills and Wealden oil sand samples show lower TOC results.
A Rock-Eval Pyrolysis was performed for the Kimmeridge Clay, Wealden oil sand, Corallian oil sand, and Blue Lias source rock samples. The analysis for the samples KC2, WOS, OM1, and OM2 did not yield sufficient results due to Tmax values exceeding 800°C. The Rock-Eval analysis provides information on the kerogen type, maturity, and potential yield of the samples.
Schlüsselwörter
The keywords and focus themes of the text include petroleum geochemistry, source rock, oil sand, kerogen type, depositional environment, maturity, petroleum potential, TOC, Rock-Eval Pyrolysis, bitumen extraction, asphaltene precipitation, IATROSCAN, GC, GC-MS, biomarker analysis, and NIGOGA.
- Citar trabajo
- Amalia Aventurin (Autor), 2014, Petroleum Geochemistry, Múnich, GRIN Verlag, https://www.grin.com/document/278498
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