Ok, there is a missing full stop after the sentence ending...

Ok, there is a missing full stop after the sentence ending "similar pay thickness" and before "LF-2 gas rate was about 4m3/hr...."

I am highlighting two issues; 1) if the water rate at LF-2 was much higher than the water rate at Nomgon-9 it would explain why the gas flow rate is so low, but there's only a 30% difference in water rate.
2) If the water rate from LF-2 (26 l/min) is typical of LF-1 and LF-3, then the total water from LF-1, LF-2 and LF-3 would be 3*26 l/min = 78 L/min, but the field total in the plot is about 82 l/min. Therefore. it doesn't make sense because there should be a lot more water making up the total i.e. from LF-4, LF-5 and LF-6.

I would verify the data in the plots, check if the units are correct and check the calibration of the gas meters. Finally, decide if the coals at Gurvantes have been compacted (lost permeability)?