Some seemingly smart people can come up with some complete rubbish sometimes.  I'm not just thinking of CERA but also the EIA.  See this analysis of their 2001 International Energy Outlook: http://www.energybulletin.net/11370.html

In the IEO2001 forecast, North Sea production reaches a peak in 2006, at almost 6.6 million barrels/day (mb.d). Production from Norway, Western Europe's largest producer, is expected to peak at about 3.7 mb/d in 2004 and then gradually decline to about 3.1 mb/d by the end of the forecast period with the maturing of some of its large and older fields. The United Kingdom is expected to produce about 3.1 mb/d by the middle of this decade, followed by a decline to 2.7 mb/d by 2020.

The report was published in March 2001 and talks of a peak in 2006. The facts of the matter are that the North Sea had already peaked back in 1999 at 5.947 mb/d! Today we are more than 1mb/d below that 1999 peak.

For Norway they forecasted a peak of 3.7 mb/d in 2004 declining to 3.1mb/d by 2020. In fact Norway had peaked the year earlier (2000) but the real absurdity was the forecasted rate of decline post peak of 1.1% per year. Show me any province, let alone a modern offshore one with a post peak decline rate as slow as that!

The UK forecast of a 3.1mb/d peak in 2005 compares with a reality of a 2.684 mb/d peak in 1999, a full two years before this report was published. The report goes on to forecast a decline to 2.7 mb/d by 2020, an annual fall of less than 1%, when in reality the UK has seen average annual falls of over 7% from 1999.

These forecasted decline rates are most concerning, either the EIA are incredibly ignorant or they are purposefully releasing misleading information.
http://www.vitaltrivia.co.uk/2005/12/44

I seem to remember that the EIA says somewhere that their methodology was to work out the demand, assume that this demand would be met, and then to describe a scenario whereby this demand could be met.  That's why they predicted, among other things, oil from Greenland (where no one is looking) and the Falkland Islands (where exploration was abandoned after some very expensive dry holes).

Not so much lying as deliberate and excessive optimism.