Journal of Petroleum Geology, vol. 23 (1), January 2000, pp. 55-90.
Copyright 
2000 by Scientific Press Ltd. All rights reserved.
COAL-GENERATED OIL: SOURCE ROCK EVALUATION AND
PETROLEUM GEOCHEMISTRY OF THE LULITA OILFIELD, DANISH NORTH SEA
H. I. Petersen*+, J. Andsbjerg*, J. A. Bojesen-Koefoed* and H. P.
Nytoft*
Controversy still exists as to whether coals can source commercial accumulations of
oil. The Harald and Lulita fields, Danish North Sea, are excellent examples of
coal-sourced petroleum accumulations, the coals being assigned to the Middle Jurassic
Bryne Formation. Although the same source rock is present at both fields, Lulita primarily
contains waxy crude oil in contrast to Harald which contains large quantities of gas
together with secondary oil/condensate. A compositional study of the coal seams at well
Lulita-1Xc (Lulita field) was therefore undertaken in order to investigate the generation
there of liquid petroleum.
