Line 6: |
Line 6: |
| | 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 = 6-23 |
− | | topg = 6-41 | + | | topg = 6-23 |
| | 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 |
Line 18: |
Line 18: |
| [[file:evaluating-source-rocks_fig6-6.png|thumb|300px|{{figure number|1}}Output from a pyrolysis analysis and when T<sub>max</sub> is recorded.]] | | [[file:evaluating-source-rocks_fig6-6.png|thumb|300px|{{figure number|1}}Output from a pyrolysis analysis and when T<sub>max</sub> is recorded.]] |
| | | |
− | ==Interpreting t<sub>max</sub>== | + | ==Interpreting T<sub>max</sub>== |
| We can use the general guidelines for maturation levels given below for [[Rock-Eval pyrolysis]] T<sub>max</sub> for [[Kerogen types|types II and III kerogens]]. Different pyrolysis techniques have different cutoffs for pyrolysis oil and gas generation zone boundaries. Pyrolysis T<sub>max</sub> can be significantly different for type I kerogen<ref name=ch06r13>Tissot, B., P., Pelet, R., Ungerer, P., 1987, [http://archives.datapages.com/data/bulletns/1986-87/data/pg/0071/0012/1400/1445.htm Thermal history of sedimentary basins, maturation indices, and kinetics of oil and gas generation]: AAPG Bulletin, vol. 71, p. 1445–1466. Excellent review of the relationships between maturation indicators and hydrocarbon generation from kerogens.</ref> or kerogen containing high sulfur concentration and is not a reliable indicator of maturity for these kerogen types. | | We can use the general guidelines for maturation levels given below for [[Rock-Eval pyrolysis]] T<sub>max</sub> for [[Kerogen types|types II and III kerogens]]. Different pyrolysis techniques have different cutoffs for pyrolysis oil and gas generation zone boundaries. Pyrolysis T<sub>max</sub> can be significantly different for type I kerogen<ref name=ch06r13>Tissot, B., P., Pelet, R., Ungerer, P., 1987, [http://archives.datapages.com/data/bulletns/1986-87/data/pg/0071/0012/1400/1445.htm Thermal history of sedimentary basins, maturation indices, and kinetics of oil and gas generation]: AAPG Bulletin, vol. 71, p. 1445–1466. Excellent review of the relationships between maturation indicators and hydrocarbon generation from kerogens.</ref> or kerogen containing high sulfur concentration and is not a reliable indicator of maturity for these kerogen types. |
| | | |
| {| class = "wikitable" | | {| class = "wikitable" |
| |- | | |- |
− | ! Hydrocarbon generation zone | + | ! Hydrocarbon generation zone || Rock-eval pyrolysis T<sub>max</sub>, °c |
− | ! Rock-eval pyrolysis T<sub>max</sub>, °c
| |
| |- | | |- |
− | | Immature | + | | Immature || < 435 |
− | | | |
− | | |
| |- | | |- |
− | | Oil (from type II kerogen) | + | | Oil (from type II kerogen) || 435–455 |
− | | 435–455 | |
| |- | | |- |
− | | Oil (from type III kerogen) | + | | Oil (from type III kerogen) || 435–465 |
− | | 435–465 | |
| |- | | |- |
− | | Gas (from type II kerogen) | + | | Gas (from type II kerogen) || > 455 |
− | | >455 | |
| |- | | |- |
− | | Gas (from type III kerogen) | + | | Gas (from type III kerogen) || > 465 |
− | | >465 | |
| |} | | |} |
| | | |
Line 62: |
Line 55: |
| [[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]] |