Hydrocarbon Exploration and Refining

Updated on 10.09.2025

2 min read

High School
STEM Professional fields, energy field

In just two minutes, find out how the search for oil and gas deposits is carried out and how is then refined into a variety of finished products.

Fossil Exploration and Refining in 2 Minutes 

Exploration = the search for deposits such as oil. 

Phase 1: subsurface ultrasound 

Seismic waves are sent underground. They are generated using truck-mounted vibrators or air guns in areas. 

Phase 2: exploratory  

A borehole is drilled and filled with . The mud brings hydrocarbon samples to the surface that confirm whether or not there is an oil deposit. Once a deposit has been identified, fossil fuel extraction can begin.

Refining = an essential step in converting fossil fuels into a variety of finished products. 
 

There are 3 key steps at an oil refinery: 
  • Separation: 
    The oil is heated and evaporated using a distillation column. (Crude oil/Distillation furnace/Distillation column) 
    The molecules condense into liquids or remain in gas form. They are captured by panels and then serve a variety of purposes. 
    (+ légendes - gas/petrochemicals/naphtha/jet fuel/ / / )
  • Conversion: 
    Liquids are converted into natural gas, gasoline and diesel using a catalyst, a substance that speeds up a chemical reaction.
  • Purification: 
    Molecules that are corrosive or harmful for the environment, especially sulfur, are removed or significantly reduced. 

Summary: 

  • Exploration = the search for fossil fuel deposits./Phase 1: subsurface ultrasound/Phase 2: exploratory drilling
  • Refining = an essential step in converting fossil fuels into a variety of finished products.
  • 3 key refining steps: Separation/Conversion/Purification.

 

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