Poisson, Alexandre; Hall, Charles A. S. - In: Energies 6 (2013) 11, pp. 5940-5959
the energy return on investment (EROI) for all Canadian oil and gas (including tar sands) over the period 1990–2008, and … increased about 63%, while the energy production (return) increased only 18%, resulting in a decrease in total EROI from roughly … 16:1 to 11:1. We also found (although with less certainty) that the EROI for tar sands alone has fluctuated around 4 …