GLOSSARY

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Panel


Expand
titleBy petroleum density




GasCondensateLight crudeMedium crudeHeavy crudeExtra heavy crude
kg/m3

< 870
870 –
870 ÷ 920
920 –
920 ÷ 1000> 1000
API
>


45° ÷ 31.1°22.3°
–
 ÷ 31.1°10°
–
 ÷ 22.3°< 10°





Panel


Expand
titleBy sulfur content



Sweet crudeSour crude oil
Sulfur  < 0.5%Sulfur  > 0.5%




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Expand
titleBy petroleum mobility



Specific Gravity *API Gravity

High perm

Medium perm

Low perm

Tight (Shale)


fracAPI> 100 md10 md  ÷ 100 md0.1 md ÷ 10 md< 0.1 md
Gas< 0.
7
5 *> 70° 



Condensate0.
7 ÷ 0.87> 45° 
69 ÷ 0.81642° ÷ 74°



Light Oil
<

0.816 ÷ 0.87

>
31.1° ÷ 42°



Medium Oil0.87 ÷ 0.
92
93
22
20.
3°
7° ÷ 31.1°



Heavy Oil0.
92
93 ÷ 1.010° ÷
22
20.
3
7°



Extra Heavy Oil (Bitumen)> 1.04° ÷ 10°



* – with reference to air.

where box colors mean:

Conventional ReservesUnconventional Reserves Unrecoverable Reserves

and the ranges of properties in the table are only tentatively define the category based on the industry statistics and conventions, which vary over history and locations.


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