1. Exploration & Discovery:
* Geological Surveys: Geologists analyze geological data, maps, and seismic surveys to identify potential oil-bearing formations.
* Drilling Test Wells: Exploratory wells are drilled to confirm the presence and quality of oil.
2. Extraction:
* Drilling Production Wells: Once a field is confirmed, production wells are drilled to extract the oil. These wells can be vertical or horizontal, depending on the geology.
* Pumping: Oil is usually under pressure, but this pressure decreases as the oil is extracted. Pumps are used to bring the oil to the surface.
* Methods:
* Primary Recovery: Natural pressure pushes oil to the surface.
* Secondary Recovery: Water or gas is injected into the formation to increase pressure and push out more oil.
* Tertiary Recovery: Advanced techniques like steam injection or chemicals are used to extract even more oil.
3. Transport:
* Pipelines: Crude oil is transported through pipelines to refineries or storage facilities.
* Tankers: Oil can also be transported by tankers to different locations.
Important Notes:
* Oil Reservoirs: Oil isn't found in large underground lakes. It's trapped in porous rock formations called reservoirs.
* Extraction is a complex process: It involves engineering, technology, and environmental considerations.
* Sustainability: As oil reserves deplete, there's growing emphasis on developing sustainable energy sources and reducing reliance on fossil fuels.
This is a simplified overview. The extraction process can be quite complex and varies depending on the specific geological conditions and technology used.
