%0 Journal Article
%T Scientific results from the deepened Lopra-1 borehole, Faroe Islands: Petroleum geochemistry of the deepened Lopra-1/1A re-entry well, Faroe Islands
%A Bojesen-Koefoed
%A J£¿rgen A.
%A Nytoft
%A H. Peter
%J Geological Survey of Denmark and Greenland Bulletin
%D 2006
%I Geological Survey of Denmark and Greenland
%X The Lopra-1/1A re-entry well was drilled as a stratigraphic test with no immediate exploration objectives. Hence, petroleum geochemical studies were of limited extent, and restricted to non-destructive analyses. The presence of natural petroleum hydrocarbons could not be confirmed with certainty, but hydrocarbons extracted from the hydrochloric acid solute of a calcite vug present in RSWC #1 (3543 m), may represent indigenous petroleum since hydrocarbon-bearing fluid inclusions have been reported from the same sample. These hydrocarbons show some similarities to petroleum generatedfrom the Upper Jurassic ¨C Lower Cretaceous Kimmeridge Clay type source rocks present in surrounding areas. Except for this sample, the results generally show the presence of a variety of contaminantsof different origins such as ¡®naturally greasy fingers¡¯ (squalene and cholesterol), cosmetics such as chap stick or hand lotion (e.g. esters such as butyl-stearate, stearyl-palmitate, vitamin A), plasticisers (phthalates), diesel oil and ¡®pipe dope¡¯.
%K oil traces
%K organic geochemistry
%K contamination
%K Faroes
%K North Atlantic
%K Lopra
%U http://www.geus.dk/publications/bull/nr9/nr9_p67-77.pdf