This "marine snow" accumulated over millennia, creating a thick, organic-rich sludge. The intense heat and pressure broke down the complex organic molecules, stripping away oxygen and other elements, leaving behind the purest form of hydrocarbons.
How Source Rock Generates Hydrocarbons Through Heat and Pressure
Because oil is less dense than the surrounding rock and water, it is buoyant and began to migrate upward through porous rock layers. Migration and Trapping: Finding the Reservoir After the oil formed, it did not remain in the source rock.
Why Organic Matter is the Key Ingredient For oil to form, the organic material must be rich in hydrocarbons, which are molecules composed primarily of hydrogen and carbon. Over time, more layers accumulated, creating immense pressure on the deeper deposits.
How Source Rock Generates Hydrocarbons Through Heat and Pressure
Extraction: Bringing the Oil to the Surface With the reservoir identified, the modern industry turns to extraction. This geological cooking process occurred deep below the surface, at specific temperature ranges known as the "oil window," typically between 60°C and 120°C.
More About Where does oil come from
Looking at Where does oil come from from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on Where does oil come from can make the topic easier to follow by connecting earlier points with a few simple takeaways.
