The global economy runs on energy, and petroleum remains its most significant source. This paper provides a foundational understanding of the oil industry, categorized into the primary sectors: Upstream (Exploration and Production), Midstream (Transportation and Storage), and Downstream (Refining and Marketing). It also touches on the chemistry of crude oil, pricing mechanisms, and the role of OPEC.


This sector connects the production sites with the refineries.

  • Storage: Crude oil is stored in massive tank farms. Storage levels are a key economic indicator; high storage levels suggest oversupply or low demand.
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