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==Example from the north sea==

==Example from the north sea==

[[file:oiloil-and-oilsource-rock-correlations_fig8-36.png|left|thumb|{{figure number|1}}Typical biomarker-based oil–source correlation from the Central Graben of the North Sea. From Telnæs and Cooper;<ref name=ch08r53>Telnæs, N., Cooper, B., S., 1991, Oil-source rock correlation using biological markers, Norwegian continental shelf: Marine and Petroleum Geology, vol. 8, p. 302–310., 10., 1016/0264-8172(91)90084-E</ref> reprinted with permission from Elsevier.]]

[[file:oiloil-and-oilsource-rock-correlations_fig8-36.png|300px|left|thumb|{{figure number|1}}Typical biomarker-based oil–source correlation from the Central Graben of the North Sea. From Telnæs and Cooper;<ref name=ch08r53>Telnæs, N., Cooper, B., S., 1991, Oil-source rock correlation using biological markers, Norwegian continental shelf: Marine and Petroleum Geology, vol. 8, p. 302–310., 10., 1016/0264-8172(91)90084-E</ref> reprinted with permission from Elsevier.]]

[[:file:oiloil-and-oilsource-rock-correlations_fig8-36.png|Figure 1]] demonstrates a typical biomarker-based oil–source correlation from the Central Graben of the North Sea. The oil is reservoired in Upper Cretaceous rocks, whereas the [[source rock]] is from the Upper Jurassic. In this case, the sterane ratios indicate that the particular source rock sample analyzed may actually be more mature than the oil. Because of the similarity in maturities, the correlation is easier than for many less mature [[source rocks]]. The similarity in distributions of both triterpanes and steranes strongly supports a positive oil–source rock correlation in this instance.

[[:file:oiloil-and-oilsource-rock-correlations_fig8-36.png|Figure 1]] demonstrates a typical biomarker-based oil–source correlation from the Central Graben of the North Sea. The oil is reservoired in Upper Cretaceous rocks, whereas the [[source rock]] is from the Upper Jurassic. In this case, the sterane ratios indicate that the particular source rock sample analyzed may actually be more mature than the oil. Because of the similarity in maturities, the correlation is easier than for many less mature [[source rocks]]. The similarity in distributions of both triterpanes and steranes strongly supports a positive oil–source rock correlation in this instance.