When this trap coincides with a reservoir rock like sandstone or limestone, a commercial oil field is formed. This prolonged exposure to heat between 90°C and 160°C "cooks" the kerogen, a process geologists call diagenesis and catagenesis.
How Ancient Organisms Process Transforms Organic Matter Into Crude Oil Over Time
Crude oil is less dense than the rock formations surrounding it, so it begins to migrate upward through porous rock layers. Here, the increasing weight created intense pressure, while the Earth’s internal heat raised the temperature.
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.
How Ancient Organisms Transform Into Crude Oil Through Diagenesis and Catagenesis
Unlike material that decomposes on the surface, this organic matter was buried quickly under layers of mud and silt. Once the oil is generated, it does not remain stationary.
More About How is crude oil created
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More perspective on How is crude oil created can make the topic easier to follow by connecting earlier points with a few simple takeaways.
