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PETROLEUM SYSTEM, FARHAH NABILAH BINTI FADZIL
E18A0028 - Coggle Diagram
PETROLEUM SYSTEM
THE PROCESSES
1. Generation
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Dead plants need high T, P & depth to transform to HCs
3. Migration
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High T, HCs migrate from source rock to reservoir rock
4. Accumulation
- Gathering of oil & gas in reservoir rocks
- Oil & gas found in traps in reservoir rock
- cap rock / seal rock (prevent oil & gas from escaping)
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THE ELEMENTS
1. Source Rock (sedimentary rock at depth at considerable time &T)
Ex:
- Shales
- Sandstones
- Carbonates
2. Reservoir Rock
- Oil & gas accumulates here
- Must hv features of porosity and permeability
3. Seal Rock
- Oil & Gas can't move effectively through it
-Ex: Mudstone, Claystone
4. Migration Route
- route for oil & gas moves from source rock to trap
Ex: fault / fracture
5. Trap
- Configuration that concentrates oil & gas into accumulation
- Ex: Stratigraphy trap, structural Trap
Accumulation order in reservoir rock
- depends on density of hydrocarbon component
- water is heavy
- oil is light
- gas lighter
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