With continued burial and deeper penetration into the Earth’s crust, kerogen underwent thermal cracking during the catagenesis stage, breaking down into liquid and gaseous hydrocarbons. Burial Depth: Typically between 1,000 and 6,000 meters below the surface.
The Migration Process of Crude Oil Formation
Stage Description Key Conditions Diagenesis Organic matter converts to kerogen. This process, known as diagenesis, converted the biological material into a waxy substance called kerogen.
The combination of a porous reservoir rock, a sealing cap rock, and a trap creates the conditions necessary for a commercial oil field to exist. Burial, compaction, low temperatures Catagenesis Kerogen breaks down into oil and gas.
The Migration Process of Crude Oil Formation
It moves upward through permeable layers until it is halted by an impermeable cap rock, creating a reservoir. Generally, oil formation requires temperatures between 60°C and 120°C, a range geologists refer to as the "oil window.
More About How is crude oil formed
Looking at How is crude oil formed from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on How is crude oil formed can make the topic easier to follow by connecting earlier points with a few simple takeaways.
