ERHC Energy Inc (ERHE)

[sideeki]

I still am not sure what "risked oil" and "unrisked oil" means. I'd be grateful if someone can straighten me out.

I know proven oil is the quantity of oil, based on all available information including seismic and drilling etc that is 90% sure to be extracted. That probable oil is that oil that has a 50% chance of being extracted and possible oil has a 10% chance of being found.

But where do risked and unrisked fit into this? I had thought that unrisked oil was that which had a high probability (?%)of being present while risked oil was a much lessor (?%) chance of being extracted.

Whenever I think I know what these terms mean, I get confused again by some report or other.