MIGRATION AND ACCUMULATION, Gas is generated from 160 degree Celsius -…
MIGRATION AND ACCUMULATION
Migration can be define as movements of hydrocarbon from their source into reservoir rocks
Accumulation in petroleum system is a phase which hydrocarbons migrate and remain trapped in a resevoir.
Oil And Gas Migration
Oil and gas are generated and stored in the pores of rocks.
Then two types of generation exist which are thermogenic and biogenic.
Once generated, the hydrocarbons will want to migrate upwards until they are stopped.
Oil And Gas Accumulation
Accumulations happen near source rocks and in large areas is charged pervasively.
Accumulation also going through to phase which are primary hydrocarbon migration and short-distance migration.
Oil generated from 100 degree celcius
Movement of oil and gas out from fine-grained to course-grained reservoir.
Moving usually in short distance as far as needed to reach to permeable bed.
Occurs as a result of buoyant and hydrodynamic processes.
moving usually in long distance from meters to hundred of kilometers.
Movement of oil and gas after formation of accumulation.
Tertiary migration include leakage, seepage and alteration of petroleum when it reaches the Earth's surface.
Major difference between secondary migration and tertiary migration is the rate of petroleum.
Water displacement, increase in petroleum filled pores.
development of advancing petroleum.
Gas is generated from 160 degree Celsius