Higher temperatures generally produce lighter hydrocarbons, while lower temperatures yield heavier oils. During this cooking process, the large organic molecules crack apart, reorganizing into the smaller, complex hydrocarbons that define crude oil.
From Ancient Marine Life to Crude Oil: The Transformation Process
Over immense spans of time, heat and pressure transform this organic muck into the liquid hydrocarbon mixture that powers modern industry. This prolonged exposure to heat between 90°C and 160°C "cooks" the kerogen, a process geologists call diagenesis and catagenesis.
Here, the increasing weight created intense pressure, while the Earth’s internal heat raised the temperature. Migration and Trapping As newer sediments piled on top, the organic-rich layer was pushed deeper underground.
From Ancient Marine Life to Crude Oil Formation Under Heat and Pressure
During this cooking process, the large organic molecules crack apart, reorganizing into the smaller, complex hydrocarbons that define crude oil. Oil moves until it encounters a non-porous cap rock, such as shale or salt, which blocks its further ascent.
More About How is crude oil created
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