This David Harris of GLJ leads their Geosciences Group , honors graduate of tbe University of Calgary . It was his work that originaly pegged E/A at the size its being proven out at . Many disputed his talk about Arun size but he called it in 2009. its clear he was right . His distractors without an honors degree in anything much less Geology should issue an Apology 

Background*

Mr. David G. Harris, also known as Dave, P.Gaol served as Senior Vice President of Geosciences at GLJ Petroleum Consultants Ltd. until October 2010 and heads up a group of experts. Mr. Harris joined GLJ in 1988, providing expertise in petrophysical studies, reservoir mapping, 3D geological modeling, gas supply studies and exploration risk analysis. Mr. Harris spent 12 years at GLJ Petroleum Consultants. His responsibility was oversight of the GeoSciences Group, which included 13 geologists, geophysicists and support staff. Mr. Harris has operated as the Sole Proprietor of DGH International GeoConsulting ("DGH" since 2010. He served as a Director at Falcon Oil & Gas Ltd. since September 25, 2012 until December 10, 2014. He served as a Director of GLJ Petroleum Consultants. Mr. Harris holds a B.Sc. Geology with Honours from University of Calgary in 1981.

Further before David Harris there was Netherland Sewell that did a report in 2005 on Elk pre drill with an estimate of 15 T's .

That work may also be proven in time to be spot on . Henry Aldorf commissioned that report when he was Int CEO of Marathon .

If you think Antelope South has  5 T then Netherland Sewell will be proven correct .

Netherland is doing one of the appraisal works for Oil Search and PACLNG .