Read Surindar Singhs "Cost Analysis of Advanced Technologies For the Production of Heavy Oil and Bitumen in Western Canada" available from the World Energy Council. No production technology is currently applicable to oil sand deposits and none are promising in development expected to be brought online within the next 20 to 25 years. 77% of this oil is currently unextractable.
If oil reaches $175 to $190 a barrel (in today's dollars) then it might be feasible to begin extraction. At that price there is no way to determine exactly what demand will be but it is unlikely to be high enough to make such extraction probable. Only a little bit of a stretch to suggest this is analogous to finding huge pools of oil on the moon.
John Thornton