In turn, the unproven reserves are divided into probable and possible reserves.

Our reserve estimates do not include any probable or possible reserves.

The Indicated Resource includes the Probable Mineral Reserves.

into two, and we will speak of probable or possible reserves.

When we speak of probable reserves, also called P50,

(1) Indicated Mineral Resources are inclusive of Probable Reserves

Proved + probable reserves (2p) is the most likely volume (>50%).

This press release uses the terms “reserves”, “resources”, “proven reserves”, “probable reserves”, “measured resources”, “indicated resources” and “inferred resources”.

This press release uses the terms "reserves", "resources", "proven reserves", "probable reserves", "measured resources", "indicated resources" and "inferred resources".

Diamond: 30 to 40 million carats of proven reserves, with 500 million carats of probable reserves.

Probable reserves are estimated based on proven reserves and the probability of finding more elsewhere.

The Company believes that the combination of proved plus probable reserves provides the best perspective of Petro-Canada's reserves.

This large category of unproved reserves can be further divided into two.

Only the addition of both proven and probable reserves allows a field to be evaluated correctly.

The increase in mineral reserves is mainly attributable to the expansion of probable reserves located on the West Flank Sector adjacent to known reserves.