Petroleum engineering

Petroleum and mining engineers

Physical part from upper reservoir completion,

Types of Crude oil properties.
1 API specific gravity
2 Specific gravity
3 viscosity gravity
Generally speaking, oil with an API gravity between 40 and 45° commands the highest prices. Above 45°, the molecular chains become shorter and less valuable to refinerier.
Crude oil is classified as light, medium, or heavy according to its measured API gravity.

Light crude oil has an API gravity higher than 31.1° (i.e., less than 870 kg/m3)

Medium oil has an API gravity between 22.3 and 31.1° (i.e., 870 to 920 kg/m3)

Heavy crude oil has an API gravity below 22.3° (i.e., 920 to 1000 kg/m3)

Extra heavy oil has an API gravity below 10.0° (i.e., greater than 1000 kg/m3)

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