this is the week..., page-20

Cashngrab,

The "C" stands for contingent. These are resources considered to be sub-commercial. To help you out see the table on page 4 at the below link:

http://www.spe.org/industry/docs/Petroleum_Resources_Management_System_2007.pdf#redirected_from=/industry/reserves/prms.php

This is an American publication but our reserve definitions pretty much follow this table.

Note: Although considered sub-commercial, doesn't mean they are not. Further exploration may prove otherwise (eg. a sweet spot), however from the current data available the analysis considers them "2C".

Hope this helps.

Once again, Google is your friend.

Gaspew ;)