The primary objective of petroleum engineering is to extract and produce hydrocarbons, such as oil and gas, from underground reservoirs.

Rotary drilling, percussion drilling, and jet drilling are all common drilling methods used in petroleum engineering.

The purpose of a production platform in offshore oil and gas production is to process and separate oil, gas, and water.

Reservoir pressure, pore pressure, and bottomhole pressure are all terms used to describe the pressure exerted by a fluid in a reservoir.

Enhanced oil recovery, secondary recovery, and tertiary recovery are all terms used to describe the process of injecting water or gas into a reservoir to maintain or increase pressure and improve oil recovery.

Pipelines, tankers, and rail cars are all common methods for transporting oil and gas over long distances.

Refining, processing, and distillation are all terms used to describe the process of converting crude oil into usable products such as gasoline, diesel, and jet fuel.

Reservoir engineering is the study of the properties and behavior of fluids in porous media.

Seismic surveys, well logging, and core analysis are all common methods for evaluating the potential of a hydrocarbon reservoir.

Exploration drilling, development drilling, and production drilling are all terms used to describe the process of drilling a well to access a hydrocarbon reservoir.

Hydraulic fracturing, acidizing, and gas lift are all common methods for stimulating production from a hydrocarbon reservoir.

Separation, dehydration, and desalting are all terms used to describe the process of separating oil, gas, and water from each other.

Above-ground storage tanks, underground storage caverns, and floating storage and regasification units are all common methods for storing oil and gas.

Pipelines, tankers, and shuttle tankers are all common methods for transporting oil and gas from offshore platforms to onshore facilities.

Orifice meters, Venturi meters, and ultrasonic flow meters are all common methods for measuring the flow rate of oil and gas.