Laser ablation GC–MS analysis of oil-bearing fluid inclusions in petroleum reservoir rocks
MetadataShow full item record
The hydrocarbon composition of co-occurring blue and yellow fluorescing fluid inclusions (FIs) in Ordovician reservoirs of the Tarim Basin, NW China have been separately analyzed by laser microprobe gas chromatography–mass spectrometry (GC–MS) using a 193 nm excimer laser to drill through the host quartz. A newly designed GC inlet system enabled detection of C4AC30 hydrocarbons, extending the molecular weight significantly beyond the C21 limit of previous online laser-based hydrocarbon analysis of oil inclusions. The blue fluorescing inclusions contain notably higher proportions of aliphatic hydrocarbons (e.g., n-alkanes, cycloalkanes) and gaseous range products, whereas the yellow fluorescing inclusions contain relatively more aromatic hydrocarbons (e.g., alkylnaphthalenes). Hydrocarbon-based parameters also indicate that the blue fluorescing inclusions are of higher thermal maturity than the yellow fluorescing inclusions, consistent with maturity estimates based on fluorescence colors. The compositional differences of the co-occurring inclusions are indicative of different oil types and charge events. This highlights the capacity of the new laser ablation technology to separately analyse specific inclusions amongst a mixture of inclusions of different fluorescing colors. In the future, integration of this new compositional detail with other inclusion and reservoir data will help reconstruct the oil charge history of the Tarim Basin.
Showing items related by title, author, creator and subject.
Lisk, Mark (2012)A comprehensive examination of the hydrocarbon charge and formation water history of the central Vulcan Sub-basin, Timor Sea has been completed and a model developed to describe the evolution of the region’s petroleum ...
The hydropyrolysis (HyPy) release of hydrocarbon products from a high maturity kerogen associated with an orogenic Au deposit and their relationship to the mineral matrixRobert, Aileen; Grotheer, Hendrik; Greenwood, Paul; McCuaig, T.; Bourdet, J.; Grice, Kliti (2016)An innovative experimental approach has been applied to a metamorphosed (> 550 °C) kerogen associated with orogenic Au mineralisation. The novel application of catalytic Hydropyrolysis (HyPy) to mineralised sediments ...
Greenwood, Paul (2011)Laser micropyrolysis gas chromatography mass spectrometry (GC-MS) allows analytical pyrolysis to be conducted with micro-spatial resolution. Despite the large range of contemporary laser sources, most previous laser ...