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Line 18: + + + + − − [[file:oiloil-and-oilsource-rock-correlations_fig8-5.png|left|thumb|{{figure number|1}}From Robinson;<ref name=ch08r46>Robinson, K., M., 1987, An overview of [[[[source rock]]s]] and oils in Indonesia: Proceedings, Indonesian Petroleum Association 16th Annual Convention, p. 97–122.</ref> reprinted with permission from the Indonesian Petroleum Association.]] − − [[file:oiloil-and-oilsource-rock-correlations_fig8-6.png|thumb|{{figure number|2}}. Copyright: Unocal.]]
Gas chromatography: data obtained (view source)
Revision as of 13:30, 11 March 2014
, 13:30, 11 March 2014→Examples
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==Examples==
==Examples==
<gallery>
file:oiloil-and-oilsource-rock-correlations_fig8-5.png|{{figure number|1}}Gas chromatogram of a high-wax oil of terrestrial origin with an odd-carbon preference in the wax region and a high pristane-phytane ratio typical of coaly or certain nearshore aquatic environments. From Robinson;<ref name=ch08r46>Robinson, K., M., 1987, An overview of [[source rock]]s and oils in Indonesia: Proceedings, Indonesian Petroleum Association 16th Annual Convention, p. 97–122.</ref> reprinted with permission from the Indonesian Petroleum Association.
file:oiloil-and-oilsource-rock-correlations_fig8-6.png|{{figure number|2}}Gas chromatogram of an extremely waxy oil from the Paradox basin, Utah. Copyright: Unocal.
</gallery>
===Example: oil of terrestrial origin===
===Example: oil of terrestrial origin===
[[:file:oiloil-and-oilsource-rock-correlations_fig8-5.png|Figure 1]] is a gas chromatogram of a high-wax oil of terrestrial origin with an odd-carbon preference in the wax region and a high pristane-phytane ratio typical of coaly or certain nearshore aquatic environments. Significant input of terrigenous organic matter is indicated by a bimodal ''n''-alkane distribution (a second mode in the wax region, from ''n''-C<sub>23</sub> to ''n''-C<sub>31</sub>), a pristane-phytane ratio greater than 2.0, and a strong odd-carbon ''n''-alkane dominance from ''n''-C<sub>25</sub> to ''n''-C<sub>31</sub>. These features are characteristic of deltaic or lacustrine-sourced oils (in this case, from Indonesia).
[[:file:oiloil-and-oilsource-rock-correlations_fig8-5.png|Figure 1]] is a gas chromatogram of a high-wax oil of terrestrial origin with an odd-carbon preference in the wax region and a high pristane-phytane ratio typical of coaly or certain nearshore aquatic environments. Significant input of terrigenous organic matter is indicated by a bimodal ''n''-alkane distribution (a second mode in the wax region, from ''n''-C<sub>23</sub> to ''n''-C<sub>31</sub>), a pristane-phytane ratio greater than 2.0, and a strong odd-carbon ''n''-alkane dominance from ''n''-C<sub>25</sub> to ''n''-C<sub>31</sub>. These features are characteristic of deltaic or lacustrine-sourced oils (in this case, from Indonesia).
===Example: oil of marine origin===
===Example: oil of marine origin===
[[:file:oiloil-and-oilsource-rock-correlations_fig8-6.png|Figure 2]] is a gas chromatogram of an extremely waxy oil from the Paradox basin, Utah. It was sourced from a marine anoxic evaporitic carbonate. Here the waxes, which are not derived from terrestrial plants, show an even-carbon preference, and the pristane-phytane ratio is very low
[[:file:oiloil-and-oilsource-rock-correlations_fig8-6.png|Figure 2]] is a gas chromatogram of an extremely waxy oil from the Paradox basin, Utah. It was sourced from a marine anoxic evaporitic carbonate. Here the waxes, which are not derived from terrestrial plants, show an even-carbon preference, and the pristane-phytane ratio is very low