Description
An unrefined mixture of naturally-occurring hydrocarbons. Because it is essentially a mixture, the density and properties of Crude Oil vary widely. Light Crude normally has an A.P.I. gravity of 30? or more. Gravities of 20? to 30? include the medium gravity crudes, while those below 20? are known as Heavy. Heavy oils are found right down to the residual solid state. See Section 8. Sour crude has a significant sulphur content; Low-sulphur crude is described as sweet.
Source :
Alpha Thames Ltd 2004