Changes

Numbered peaks are hopanes. T_s and T_m are, respectively, 18α(H)-22,29,30-trisnorneo-hopane and 17α(H)-22,29,30-trisnorhopane. Rearranged and regular steranes are indicated.

Numbered peaks are hopanes. T_s and T_m are, respectively, 18α(H)-22,29,30-trisnorneo-hopane and 17α(H)-22,29,30-trisnorhopane. Rearranged and regular steranes are indicated.

==Example from the gulf of Mexico==

==Example from the Gulf of Mexico==

[[file:oiloil-and-oilsource-rock-correlations_fig8-37.png|300px|thumb|{{figure number|2}}(left) Sterane distribution of a typical oil from the northern Gulf of Mexico. (right) Oils from this area all have essentially identical sterane distributions. Copyright: Unocal.]]

[[file:oiloil-and-oilsource-rock-correlations_fig8-37.png|300px|thumb|{{figure number|2}}(left) Sterane distribution of a typical oil from the northern Gulf of Mexico. (right) Oils from this area all have essentially identical sterane distributions. Copyright: Unocal.]]

[[:file:oiloil-and-oilsource-rock-correlations_fig8-37.png|Figure 2]] (left) shows the sterane distribution for a typical oil from the northern Gulf of Mexico. In this case, the distribution of 5α(H),14α(H),17α(H), 20R-cholestanes, -methylcholestanes, and -ethylcholestanes (that is, the C₂₇, C₂₈, and C₂₉ regular steranes, respectively) is used as a correlation parameter because it generally remains constant throughout the thermal generation of oil. Oils from this area all have essentially identical sterane distributions (right), suggesting they are related.

[[:file:oiloil-and-oilsource-rock-correlations_fig8-37.png|Figure 2]] (left) shows the sterane distribution for a typical oil from the northern Gulf of Mexico. In this case, the distribution of 5α(H),14α(H),17α(H), 20R-cholestanes, -methylcholestanes, and -ethylcholestanes (that is, the C₂₇, C₂₈, and C₂₉ regular steranes, respectively) is used as a correlation parameter because it generally remains constant throughout the [[Petroleum generation|thermal generation of oil]]. Oils from this area all have essentially identical sterane distributions (right), suggesting they are related.

==Example from Oman==

==Example from Oman==