TY - JOUR
T1 - Petroleum geochemistry of the deepened Lopra-1/1A re-entry well, Faroe Islands
AU - Bojesen-Koefoed, Jørgen A.
AU - Nytoft, H. Peter
PY - 2006/5/31
Y1 - 2006/5/31
N2 - 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 generated from the Upper Jurassic - 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 contaminants of 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'.
AB - 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 generated from the Upper Jurassic - 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 contaminants of 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'.
KW - Contamination
KW - Faroes
KW - Lopra
KW - North Atlantic
KW - Oil traces
KW - Organic geochemistry
UR - http://www.scopus.com/inward/record.url?scp=33748453490&partnerID=8YFLogxK
U2 - 10.34194/geusb.v9.4860
DO - 10.34194/geusb.v9.4860
M3 - Article
SN - 2597-2154
SN - 1904-4666
SN - 1604-8156
VL - 9
SP - 67
EP - 77
JO - Geological Survey of Denmark and Greenland Bulletin
JF - Geological Survey of Denmark and Greenland Bulletin
ER -