GCA reported a P-50 recoverable raw gas of 7.0 TCF. See link below
OIL Search paid for 7.0 T's.
The adjustment to 5.3 T's is after shrinkage for condensates, flaring and plant fuel and non hydro carbon compounds.. See page 2.
Or OIl Search is playing games with the 5.3 numbers. They must pay for the condensates, must pay for plant fuel etc, Not sure ask Civelli ,,