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bitumens (1)
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Characterizing the Recent Sediments from Pigeon Lake, Alberta as Related to Anthropogenic and Natural Fluxes
Depositional Environment and Oil Generation in Ordovician Source Rocks from Southwestern Ontario, Canada: Organic Geochemical and Petrological Approach
Black Shale Source Rocks and Oil Generation in the Cambrian and Ordovician of the Central Appalachian Basin, USA: Discussion
Geology and Petroleum Potential of Upper Cretaceous and Tertiary Strata, Beaufort-Mackenzie Area, Northwest Canada
Thermal maturation of organic matter in the Middle Devonian to Tertiary section, Fort Norman area (central Mackenzie Plain)
Source Rock Potential and Thermal Maturity of Lower Cretaceous Strata: Monkman Pass Area, British Columbia
Abstract Nine oils from 8 wells and one seismic shot hole and 15 solvent extracts from 8 wells in the Prudhoe Bay and North Slope region were analyzed using the following techniques: (1) column chromatographic fractionation; (2) saturate fraction gas chromatography; (3) gasoline range stripping of 25 compounds (oils only); (4) aromatic family analysis (oils and selected extracts); (5) kerogen isolation and CHN analysis (cores only); (6) total organic carbon (cores only). Normal oil-source correlation procedures for this laboratory consist of (1) normal-alkane and acyclic isoprenoid pattern interpretation and matching; (2) cluster and factor analysis of 26 gasoline range compounds; and (3) cluster and factor analysis of 16 classes of compounds in the aromatic fraction. Ancillary data such as kerogen type and quantity, level of thermal alteration, and yield and distribution of saturate, aromatic, NSO, and asphaltene classes are used to make volumetric estimates and to confirm the nature and possible distribution of the source rocks. For the North Slope core samples, low extract yields and moderate to high levels of contamination of the cores precluded useful interpretation of much of the saturate fraction GC data, and the dry storage of the cores precluded obtaining the gasoline range fraction by helium stripping. Biodegradation of two of the oil samples resulted in removal of most of the n -alkanes and acyclic isoprenoids. The Shublik Formation sample from Ikpikpuk No. 1 at a reflectance level of 1.5% and the Kingak Shale sample from North Kalikpik No. 1 at a reflectance of 0.8% (hydrocarbon yields of 46.4 and 68.4 mg/g, respectively) were the only two samples that exceeded the 30 mg/g cutoff for a potential petroleum source rock. The Kingak sample had only about 1% total organic carbon and is thus probably quantitatively insignificant as a source. Three of four other samples that had reflectance levels above 1.5% still have organic carbon contents of 1.8 to 4.5% and could have acted as sources as they passed through the optimum oil generation stage. Other samples were very low (<9 mg/g), and the extract properties have been essentially masked by contamination.