When these organisms died, their bodies sank to the seabed or lake bottom, mixing with sediments. Heat (60-120°C), pressure, time Migration Oil moves through rock pores.
Geological History: How Organic Material Transformed Into Crude Oil Over Time
It moves upward through permeable layers until it is halted by an impermeable cap rock, creating a reservoir. Pressure: The weight of overlying rock layers squeezes the organic material, driving chemical reactions.
Due to its lower density than the surrounding rock, it is buoyant and slowly migrates through porous geological formations. Timeframe: Often millions to tens of millions of years are required for the transformation to be complete.
Geological History of Crude Oil Formation
Buoyancy, permeability Accumulation Oil pools in a reservoir rock. The Organic Origins: Building Blocks of Crude Oil The story of crude oil begins in ancient seas, lagoons, and lakes where plankton, algae, and other microorganisms flourished.
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