Table R4.1      Reserves and production changes in crude oil (106 m3)
  2016 2015 Change
Initial established reservesa      
  Light-medium 2610.0 2 601.2 +8.8
  Heavy 436.6 431.7 +4.9
Total 3 046.6 3 032.9 +13.7
Cumulative productionb      
  Light-medium 2 407.5 2 388.5 +19.0
  Heavy 371.0 363.6 +7.4
Total 2 778.5 2 752.1 +26.4
Remaining established reservesa      
  Light-medium 202.3 212.6 -10.3
  Heavy 65.5 68.1 -2.6
Total 267.8 280.7 -12.9
  (1 685 106 bbl)c (1 766 106 bbl)c (-81 106 bbl)c
Annual production      
  Light-medium 19.0 22.7 -3.7
  Heavy 6.8 7.9 -1.1
Total 25.8 30.6 -4.8
a Any discrepancies are due to rounding.
b Change in cumulative production is a combination of annual production and all adjustments to previous production records.
c bbl = barrels.