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| | part = Critical elements of the petroleum system | | | part = Critical elements of the petroleum system |
| | chapter = Evaluating source rocks | | | chapter = Evaluating source rocks |
− | | frompg = 6-1 | + | | frompg = 6-18 |
− | | topg = 6-41 | + | | topg = 6-18 |
| | author = Carol A. Law | | | author = Carol A. Law |
| | link = http://archives.datapages.com/data/specpubs/beaumont/ch06/ch06.htm | | | link = http://archives.datapages.com/data/specpubs/beaumont/ch06/ch06.htm |
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| | isbn = 0-89181-602-X | | | isbn = 0-89181-602-X |
| }} | | }} |
− | Obviously, the two main elements of hydrocarbons are hydrogen and carbon. Therefore, once we know the amount of [[total organic carbon (TOC)]] present in a rock, we then need to know the amount of hydrogen present in order to assess overall source rock quality. The amount of oxygen and hydrogen present in the kerogen defines the [[Kerogen types|kerogen]] as type I, II, or III and if the rock will be oil or gas prone. | + | Obviously, the two main elements of hydrocarbons are hydrogen and carbon. Therefore, once we know the amount of [[total organic carbon (TOC)]] present in a rock, we then need to know the amount of hydrogen present in order to assess overall source rock quality. The amount of oxygen and hydrogen present in the [[kerogen]] defines the kerogen as type [[Type I kerogen|I]], [[Type II kerogen|II]], or [[Type III kerogen|III]] and if the rock will be oil or gas prone. |
| | | |
| ==Hydrogen index== | | ==Hydrogen index== |
− | The hydrogen index (HI) represents the amount of hydrogen relative to the amount of organic carbon present in a sample. The [[Rock-Eval_pyrolysis#Rock-eval_pyrolysis|S2 curve]] of a Rock-Eval analysis can help us determine the total amount of hydrogen in milligrams of hydrogen to grams of sample according to the following formula: | + | The [[hydrogen index]] (HI) represents the amount of hydrogen relative to the amount of organic carbon present in a sample. The [[Rock-Eval_pyrolysis#Rock-eval_pyrolysis|S2 curve]] of a Rock-Eval analysis can help us determine the total amount of hydrogen in milligrams of hydrogen to grams of sample according to the following formula: |
| | | |
| :<math>\mbox{HI} = \mbox{S2} \mbox{ (Mg/g)}/\%\mbox{TOC} \times 100</math> | | :<math>\mbox{HI} = \mbox{S2} \mbox{ (Mg/g)}/\%\mbox{TOC} \times 100</math> |
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| [[Category:Critical elements of the petroleum system]] | | [[Category:Critical elements of the petroleum system]] |
| [[Category:Evaluating source rocks]] | | [[Category:Evaluating source rocks]] |
| + | [[Category:Treatise Handbook 3]] |