heavy oil
heavy oil — noun
1. a thick, dark type of crude oil that is dense and does not flow easily at room t
a thick, dark type of crude oil that is dense and does not flow easily at room temperature. Because it contains large amounts of carbon-rich molecules, extracting usable fuels from it requires more processing than with lighter oils.
The refinery in Batangas was built to process heavy oil from local wells.
process heavy oil — verb + heavy oil as object
Ingrid explained that heavy oil must be heated before it can be pumped through pipelines.
must be heated — modal passive showing handling requirement
Canadian companies invested more in heavy oil extraction when prices rose.
A heavy oil spill near the coast kept cleanup crews busy for six weeks.
Faisal's team developed a new method to upgrade heavy oil into jet fuel more efficiently.
- dense crude
less formal industry shorthand, used mainly in conversation or informal reports
- bitumen
a specific, extremely thick form of heavy oil found in oil sands; not interchangeable with all heavy oil grades
- light crude oil
lower-density crude that flows freely and requires less processing
- sweet crude
overlaps with light crude but refers to sulfur content rather than density; only a partial antonym
文法句型
[heavy oil] as a mass noun
用法筆記
Heavy oil is distinct from light crude oil because of its higher density and viscosity. It is often referred to in the context of oil sands, enhanced recovery, and upgrading processes.