Migration Of HC Flashcards
It is the process where petroleum moves from its origin the source rock to the surface of the earth
Migration
What are the three types or stages of migration
Primary
Secondary
Tertiary
Ezpulsion od petroleum from source rx to permeable rocks
Primart migration
Subsequent movemnt of petroleum within caarier beds and reservoir and to traps
Secondary Migration
Leakage and dissipation of petroleum to the earths surface
Tertiary migra
Primary migration controversy
Oil generation at 6 to 120 degrees typically at depths of 2 to 4 km, source rocks are so compacted that their porosity and permeability are too low for efficient primary migration
Water in hydrocarbon reservoirs that originate from the water that surrounded after depositional aka fossil water
Connate water
Fresh water that petticoats from the surface ma at also alter its chemistry during burial
Meteoric water
Formation on water composition
Saline with chlorine and sodium, 5:1 Ca Mg ratio
Relationship of salinuty and depth
Directly proportional
Process where the water molecule are able to migrate upwards through shale while oils and gas stay behind
Reverse osmosis
Over pressure in shale because of its non porous and impermeable litho
Compaction disequilibrium
Primary motor that’s drives expulsion of hydrocarbon from spec ve
Compaction
Migration occurs before the hydrocarbons are recognizable crude oil wholly tree they are in the form of proto petroluem
Ezpulsion of hydrocarbon as petroluem
Oil and gas were squeezed from source clay
during early burial before compaction destroyed
permeability
Expulsion in solution as dissolved in water from compaction meteoric flushing
