oil shale

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oil shale

A geologist examines a sample of oil shale in a laboratory.

Definition

Noun: - A type of sedimentary rock: Oil shale is a fine-grained sedimentary rock containing significant amounts of kerogen, a solid mixture of organic chemical compounds. When heated to high temperatures, this kerogen can be converted into a synthetic crude oil.

Usage
  • Oil shale is a source of unconventional oil.
  • The primary commercial interest in oil shale lies in its potential to produce liquid hydrocarbons through a process called retorting.
  • It is distinct from "shale oil," which refers to oil trapped within shale formations that can be extracted by methods like hydraulic fracturing.
Examples
  • Noun:
    • The country has vast reserves of oil shale.
    • Extracting oil from oil shale is an energy-intensive process.
    • The geology class studied the composition of oil shale samples.
Advanced Usage
  • "Oil shale deposits": Refers to the geological formations where this rock is found.
    • The Green River Formation in the western United States contains some of the world's largest oil shale deposits.
  • "Oil shale retorting": The specific industrial process of heating oil shale to release hydrocarbons.
    • The company invested in new technology for more efficient oil shale retorting.
Variants and Related Words
  • Kerogen (n): The solid organic material within oil shale that yields oil upon heating.
  • Shale oil (n): This is a related but distinct term referring to light crude oil trapped in shale rock formations, typically extracted via fracking, not from heating the rock itself.
  • Retort (n/v): A vessel or process for heating substances, like oil shale, to separate their components.
Synonyms
  • Kerogen shale: A more technical synonym emphasizing the key component.
  • Bituminous shale: An older or less precise term sometimes used.
Notes on Meaning
  • The term oil shale specifically refers to the itself, not the extracted liquid. The liquid product is called "shale oil" or "synthetic crude."
  • It is an unconventional energy resource, meaning it is not extracted using traditional oil well methods.
oil shale

A geologist examines a sample of oil shale in a laboratory.

Noun
  1. shale from which oil can be obtained by heating