thermal_maturity
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| - | ==== Thermal Maturity Studies and Microfossils | + | ==== Thermal Maturity Studies: Source Rocks and Kerogen Types ==== |
| **Source Rocks and Organic Maturity** | **Source Rocks and Organic Maturity** | ||
| - | Petroleum Systems Analysis is the phase in basin screening and exploration where it is determined if all the necessary elements are in place to generate and trap hydrocarbons. These include elements such as the presence of a source-rock, | + | //Petroleum Systems Analysis// is the phase in basin screening and exploration where it is determined if all the necessary elements are in place to generate and trap hydrocarbons. These include elements such as the presence of a source-rock, a reservoir, a trap and a seal but also include quantitative assessments including how much hydrocarbons could be generated from the source rock under different degrees of maturity and whether there are suitable migration routes to allow the hydrocarbons to get from the source rocks and into the reservoir/trap. Does the reservoir comprise |
| Microfossils cannot directly inform us of the latter features of a Petroleum System but they can give us insights - some quantitative - into the source-rocks and hydrocarbon-generative aspects of a Petroleum System. | Microfossils cannot directly inform us of the latter features of a Petroleum System but they can give us insights - some quantitative - into the source-rocks and hydrocarbon-generative aspects of a Petroleum System. | ||
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| //Inputs into Petroleum Systems Analysis.// | //Inputs into Petroleum Systems Analysis.// | ||
| - | Most source-rocks are marine in origin although coals and certain lacustrine sediments can also be very organic rich. Some of the most prolific source-rocks (grouped by age) are listed below: | + | Most source-rocks are marine in origin although coals and certain lacustrine sediments can also be very organic rich. Some of the world' |
| - | Silurian (9%); Qusaiba and correlatives, | + | * **Silurian** (9%); Qusaiba and correlatives, |
| - | Palaeozoic-reservoired oil and gas in Middle East (?1000tcf of gas in North Dome/South Pars | + | * **Late Devonian-Early Carboniferous** (8%); Awaynat Wanin C, North Africa (also Domanik, Timan-Pechora and Woodbend, Alberta) |
| - | alone). | + | * **Late Carboniferous-Early Permian** (8%) |
| - | • Late Devonian-Early Carboniferous (8%); Awaynat Wanin C, North Africa (also Domanik, TimanPechora and Woodbend, Alberta) | + | * **Late Jurassic** (25%); Diyab, Naokelekan, Middle East – accounts for all Jurassic-reservoired oil and gas in Middle East (>100 billion barrels of oil in Ghawar Field) +Kimmeridge Clay Formation/Draupne in the North Sea |
| - | • Late Carboniferous-Early Permian (8%) | + | * **Mid Cretaceous** (29%); La Luna-Querecual-Naparima Hill, Eastern Venezuelan Basin - accounts for all oil in Faja Petrolifera del Orinoco (1.3 trillion barrels); Kazhdumi, Iran – accounts for all Cretaceous- and some Oligo-Miocene- reservoired oil in the Iranian |
| - | • Late Jurassic (25%); Diyab, Naokelekan, Middle East – accounts for all Jurassic-reservoired oil and | + | * **Palaeocene-Eocene**; Pabdeh, Iran – accounts for some Oligo-Miocene- reservoired oil in the Iranian |
| - | gas in Middle East (>100 billion barrels of oil in Ghawar Field) +KCF/Draupne in the North Sea | + | * **Oligocene-Holocene** (13%); Maykop, Eastern Paratethys - accounts for much of oil and gas in South Caspian (Miocene Diatom Suite also a contributor) |
| - | • “Middle” | + | |
| - | accounts for all oil in Faja Petrolifera del Orinoco (1.3 trillion barrels); Kazhdumi, Iran – accounts | + | |
| - | for all Cretaceous- and some Oligo-Miocene- reservoired oil in Zagros | + | |
| - | • Palaeocene-Eocene; | + | |
| - | • Oligocene-Holocene (13%); Maykop, Eastern Paratethys - accounts for much of oil and gas in | + | |
| - | South Caspian (Miocene Diatom Suite also a contributor) | + | |
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thermal_maturity.1683735849.txt.gz · Last modified: 10/05/2023 16:24 by mike_gss