Composition and Variability No two oil deposits are identical, as the specific composition depends on the original biological source and the geological history it endured. This process, known as diagenesis, converted the soft organic matter into a waxy substance called kerogen, locked within the sedimentary rock.
Temperature Range and Maturation of Oil Formation
With increasing burial depth came rising temperatures and pressures, transforming the organic material. This critical window of temperature and time is known as the oil window.
The balance of sulfur, nitrogen, and metals within the blend determines its classification as sweet or sour, and light or heavy, which directly impacts its value and refining process. This complex mixture of hydrocarbons originates from organic matter deposited in oxygen-poor environments millions of years ago, where it was protected from complete decay.
Temperature Range for Oil Formation Maturation and the Oil Window
Due to its lower density compared to surrounding water and rock, it becomes buoyant and begins to migrate upward through porous rock layers. Migration and Trapping Once formed, the newly created oil is not stationary.
More About What is oil made from
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More perspective on What is oil made from can make the topic easier to follow by connecting earlier points with a few simple takeaways.
