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Petroleum System, Physical + chemical properties of sub-surface fluid -…
Petroleum System
Definition
Combination of the main geological attributes
Led to the accumulation of the hydrocarbon
Encompasses active source rock + oil and gas related
Petroleum
have:
High thermal and biological hydrocarbon gas
High condensates
High crude oil
High natural bitumen content
System
Interdependent element + processes = hydrocarbon accumulation
Elements
Reservoir rock
Seal rock
Source rock
Overburden rock
Processes
Trap formation
Permeable (reservoir) + Less permeable (seal) = Hydrocarbon accumulate
Elements:
Trap reservoir
Trap seal
Trap fluids
Generation
Expulsion
movement of hydrocarbon from source rock to the carrier bed
Migration
Hydrocarbon migrate in filament through the pore system
Buoyancy pressure exceed capillary resistance
Accumulation
When migrating hydrocarbon filament encounter the seal
Physical + chemical properties of sub-surface fluid
with addition of