Petrol

Petrol

a naturally occurring, flammable liquid consisting of a complex mixture of hydrocarbons of various molecular weights and other liquid organic compounds, that are found in geologic formations beneath the Earth's surface. A fossil fuel, it is formed when large quantities of dead organisms, usually zooplankton and algae, are buried underneath sedimentary rock and undergo intense heat and pressure.

Industry: Energy

Add a new term

Contributors in Petrol

Become a Contributors

Petrol

Roof (coal)

Energy; Coal

The rock immediately above a coal seam. The roof is commonly a shale, often carbonaceous and softer than rocks higher up in the roof strata.

Scoop loading

Energy; Coal

An underground loading method by which coal is removed from the working face by a tractor unit equipped with a hydraulically operated bucket attached to the front; also called a front-end loader.

Topping cycle

Energy; Coal

A boiler produces steam to power a turbine-generator to produce electricity. The steam leaving the turbine is used in thermal applications such as space heating and/or cooling or delivered to other ...

No. 1 fuel oil

Energy; Coal

A light distillate fuel oil that has distillation temperatures of 400 degrees Fahrenheit at the 10-percent recovery point and 550 degrees Fahrenheit at the 90-percent recovery point and meets the ...

Prediscovery costs

Energy; Coal

All costs incurred in an extractive industry operation prior to the actual discovery of mineralsin commercially recoverable quantities; normally includes prospecting, acquisition, and exploration ...

Roll front

Energy; Coal

A type of uranium deposition localised as a roll or interface separating an oxidised interior from a reduced exterior. The reduced side of this interface is significantly enriched in uranium.

Test well contribution

Energy; Coal

A payment made to the owner of an adjacent or nearby tract who has drilled an exploratory well on that tract in exchange for information obtained from the drilling effort.