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PETROLEUM SYSTEM: Migration & Accumulation - Coggle Diagram
PETROLEUM SYSTEM: Migration & Accumulation
OIL & GAS MIGRATION
Controlled by the physical properties of the
sedimentary strata the oil is moving
Porosity
Permeability
Secondary
Movement - fluids within reservoir rocks leading to oil & gas segregation
Carries Beds -) Trap
DIATANCE: Long & Short (meters - hundreds of km)
Tertiary
Movement - oil & gas after formation of recognizable accumulation
Trap -) Fresh Trap & Seepage
DISTANCE: Short (meters to hundreds of km)
Primary
movement of oil and gas - fine-grained to coarse-grained
Source Rock -) Carries Beds
DISTANCE: Short
Primary vs secondary
Involves the movement of petroleum through permeable layers to the trap
Involves the expulsion of petroleum from the source rocks to reservoir rocks
OIL & GAS ACCUMULATION
Relatively coarse-grained porous & permeable rocks that contain little @ no insoluble organic matter
Any reduction in the permeability of rock
during migration can result in accumulation
Through hydrocarbon primary and secondary of short distance
Controlled by non-buoyancy drive