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Kerogen‐bound and free hopanoic acids in the messel oil shale kerogen
Chirality, 2001AbstractThe distribution of the free and bound hopanoic acids in both unheated and heated (350°C for 50 h) kerogens, isolated from the Messel oil shale, were analyzed by GC‐MS. The bound acids were released by subjecting the kerogen to three different treatments, namely, thermochemolysis in the presence of tetramethylammonium hydroxide (TMAH), as well ...
Abbott GD, Bashir FZ, Sugden MA
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Kerogen based characterization of major gas shales: Effects of kerogen fractionation
Organic Geochemistry, 2015Abstract Research into the origin and the mode of entrapment and expulsion of natural gas from unconventional plays requires the isolation and separation of kerogen in its purest and most intact form from the rock matrix. This study expands on the comparative analysis of the effects that isolation methods, conservative closed system versus ...
Denet Pernia +2 more
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Primary migration by diffusion through kerogen: II. Hydrocarbon diffusivities in kerogen
Geochimica et Cosmochimica Acta, 1990Abstract Laboratory experiments were performed to assess diffusion through kerogen as a mechanism of liquid hydrocarbon transport through fine-grained rocks. Such transport can be important in primary migration within source rocks and in leakage through seals. Previous work with organic-coated model cores has shown that hydrocarbon diffusion through
Michele Moisio Thomas, Jamie A. Clouse
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Chemical modelling of kerogens
Organic Geochemistry, 1987Abstract Models of kerogens belonging to the three classical Types have been represented at the following evolution stages: • -beginning of diagenesis (sensu-stricto), • -beginning of catagenesis, • -end of catagenesis. Chemical models are drawn, using analytical data obtained on natural samples: elemental analysis, electron ...
F. Behar, M. Vandenbroucke
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Chemical beneficiation of shale kerogen
Energy & Fuels, 1990By aqueous caustic digestion of oil shale at 150-165 o C followed by acid extraction, as much as 95% of the mineral matter can be removed from raw shale without significantly altering the kerogen liquefaction reactivity from that in its virgin state. This paper describes bench-scale results of beneficiation of the Green River shale using this caustic ...
John D. McCollum, W. F. Wolff
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1978
As sedimentation and subsidence continue, temperature and pressure increase. In this changing physical environment, the structure of the immature kerogen is no longer in equilibrium with its surroundings. Rearrangements will progressively take place to reach a higher, and thus more stable, degree of ordering.
Bernard P. Tissot, Dietrich H. Welte
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As sedimentation and subsidence continue, temperature and pressure increase. In this changing physical environment, the structure of the immature kerogen is no longer in equilibrium with its surroundings. Rearrangements will progressively take place to reach a higher, and thus more stable, degree of ordering.
Bernard P. Tissot, Dietrich H. Welte
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Palynological Kerogen Classification
1995Viewed as a whole, the published palynological organic matter classifications are characterized by a great deal of duplication of effort that has resulted in much superfluous jargon. A generally acceptable terminology has proved elusive and so workers have continued to propose new terms to describe what are, by and large, a relatively familiar set of ...
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Diagenetic modification of kerogens
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1985Kerogen is the part of sedimentary organic matter that is not petroleum. It can be isolated by using acid destruction of minerals, except in recent sediments where this procedure results in important hydrolysis reactions. Whether the scale of observation is microscopic or molecular, kerogens are heterogeneous mixtures whose compositions ...
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Kerogen: Composition and Classification
1978The term kerogen will be used here to designate the organic constituent of the sedimentary rocks that is neither soluble in aqueous alkaline solvents nor in the common organic solvents. This is the most frequent acceptance of the term kerogen, and results from a direct generalization to other rock types of the definition by Breger (1961) in ...
Bernard P. Tissot, Dietrich H. Welte
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Kerogen studies and geological interpretations
Journal of Geochemical Exploration, 1977Abstract Kerogen is defined as the portion of organic matter in sedimentary rocks that is insoluble in organic solvents. It is formed from formerly living organic materials by diagenetic processes in the first few hundred meters of burial and is partially converted, under the influence of temperature and time, into petroleum by a series of complex ...
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