seruway may have 4.5 tcf gas & 80 mm bbls oil

The Gurame Deep is a low risk 423 BCF gas prospect prospect  near shore, adajcent to
the northeast coast of North Sumatra, in the 2947 square kilometer Seruway PSC. The
Seruway block proper contains numerous prospects and leads with most likely oil and
gas resources  in excess of 4.5 TCF of gas and 80 mm bbls of oil and condensate, all of
which will be held with production from Gurame Deep

Source:
http://alswebpage.netfirms.com/jaksbit/Simco/Seruway_PSC-_Gurame_Deep_Well.pdf

I am not sure when this report was produced and how accurate it this report which I found on internet. Expert opinions are welcome.