Table R5.1 Reserve and production changes in marketable conventional gas (109 m3)
  Gross heating value (MJ/m3)   Volumes
  2016 2015 Change
Initial established reserves     5 560.9 5 541.0 +19.9
Cumulative production     4 802.4 4 711.9 +90.5a
Remaining established reserves downstream of field plants          
As is 39.1   758.4 829.1 -70.7
      (26.9 Tcf)b (29.4 Tcf)b  
Minus liquids removed at straddle plants     24.0 27.6 -3.6c
Remaining established reserves downstream of straddle plants          
As is 37.4   734.5 801.5 -67.0c
      (26.1 Tcf)b (28.4 Tcf)b  
Annual production 37.4   100.4d 102.4d -2.0d
a Change in cumulative production is a combination of annual production and all adjustments to previous production records.
b Tcf trillion cubic feet.
c Any discrepancies are due to rounding.
d Does not include conventional gas from AER-defined CBM wells.