Small angle neutron scattering signature of oil generation in artificially and naturally matured hydrocarbon source rocks

Autor:	J.M. Hope, George D. Wignall, Christopher J. Boreham, O. G. Randl, A.L. Hinde, P. Lindner, A.P. Radlinski
Rok vydání:	2000
Předmět:	Maturity (geology) chemistry.chemical_classification Hydrocarbon Source rock chemistry Geochemistry and Petrology Clastic rock Mineralogy Sedimentary rock Atmospheric temperature range Small-angle neutron scattering Oil shale Geology
Zdroj:	Organic Geochemistry. 31:1-14
ISSN:	0146-6380
DOI:	10.1016/s0146-6380(99)00128-x
Popis:	We have demonstrated for the first time the application of a small angle neutron scattering (SANS) technique for the precise determination of the onset of hydrocarbon transport (primary migration) in shaly source rocks. We used a sequence of rocks pyrolysed in the laboratory under nitrogen at temperatures in the range 310–370°C. These rocks contained several percent of dispersed marine Type II organic matter. Geochemical analysis indicated a peak of the hydrocarbon generation in the middle of the temperature range (at 340°C). We observed a sharp decrease of SANS intensity in a narrow maturity range within the geochemically determined region of the onset of hydrocarbon generation. This decrease was a direct consequence of the SANS contrast variation caused by the invasion of the pore space by bitumen during the primary migration of hydrocarbons. A similar phenomenon was observed for a natural maturity sequence of source rocks originating from the same location.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::13a1a579ee43a71b699bc617e356133d https://doi.org/10.1016/s0146-6380(99)00128-x Zobrazit plný text záznamu Full Text from ScienceDirect