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  1. Where our oil comes from in depth - U.S. Energy Information ...

    Production of crude oil and natural gas is sometimes called conventional production or unconventional production. Conventional production generally means that crude oil and …

  2. Oil formation - Energy Education

    The formation of oil begins in warm, shallow oceans that were present on the Earth millions of years ago. In these oceans, extremely small dead organic matter - classified as plankton - falls …

  3. Where Does Oil Come From and How Is It Formed? - BKV Energy

    Crude oil is called a fossil fuel because it’s actually formed from fossils – the diatoms, or ancient plants, bacteria, and algae we mentioned previously. The word “petroleum” actually means …

  4. Oil and Natural Gas Formation | EARTH 109 Fundamentals of ...

    Relatively lower temperatures and pressures form oil, while higher temperatures and pressures form natural gas, however, a spectrum of hydrocarbons can be formed, including ethane, …

  5. Where Does Oil Come From? Debunking the Dinosaur Myth

    Aug 23, 2025 · Separate fact from fiction about oil’s origins. Learn the true, ancient biological and geological story of how crude oil formed, far from dinosaurs.

  6. How Does the Earth Make Oil? – The Institute for ...

    Jun 7, 2025 · The Earth makes oil through a slow, multi-stage process spanning millions of years, starting with the accumulation of dead organic matter – primarily algae and plankton – on the …

  7. Flexi answers - How is crude oil made? | CK-12 Foundation

    Crude oil is formed over millions of years from the remains of ancient marine organisms like plankton and algae. Here's a simplified version of the process: Accumulation: When these …