Formation and Geochemistry of Oil and Gas

Bitumen biomarkers in the Mid-Proterozoic Ilímaussaq intrusion, Southwest Greenland – A challenge to the mantle gas theory

“…However, the application of GC, GC/MS and stable carbon isotopic analysis on hydrocarbons from reservoirs and organic-rich rocks provide ample evidence for a biogenic origin for almost all existing oil and gas accumulations (Philp, 2004). The relatively few hydrocarbon occurrences that still exist for which a biotic source is not immediately obvious have been taken as examples of a deep abiotic source by a few scientists eager to propose large accumulations of yet undiscovered hydrocarbons (Gold and Soter, 1980;Kutcherov and Krayushkin, 2010).…”

Distribution of Steranes and Triterpanes Biomarkersas Indication of Depositional Environment and Maturity of Sargelu and Kurrachine Formations in Different Wells Northern Iraq

“…The biomarker components reflect precursor molecules in the organisms and plants living at the time of deposition; therefore, can provide valuable information on the environmental conditions during deposition (Philp, 2003;Martinelli, 2009). Some biomarkers refer to general biological source e.g.…”

An Oil-Source Rock Correlation Examining the Potential of the Chattanooga Shale as a Source Rock for Oil within the Spivey-Grabs-Basil Field, Kingman and Harper Counties, Kansas

“…Did the Chattanooga shale produce the oil which overlies it in the Spivey-Grabs-Basil field? The biomarker results can tell us detailed story about both potential source rocks and crude oils such as "source, maturity, age, migration, depositional environment and extent of biodegradation" (Philp, 2004). The purpose of this research, however, is to relate the potential source rock to the overlying crude oils.…”

“…Since there are so many different hydrocarbon variations in oils, a group of organic carbons called the normal n-alkanes-which dominated plant waxes-and isoprenoids are used to glean additional information (Philp, 2004).…”