nice update ann, page-18

6/64 = diameter of orifice (in inches) that was used for the gas/oil to escape from the well.

This is approximately 2.6 mm.!!!

Does this put the flowrates into perspective??

This small(est) of orifices would have been chosen to ensure that no damage was done to the well by creating excessive INITIAL flowrtes.

Also minimises the total volume (easier to flare etc.) to enable buildup of pressure after the flow test.

Subsequent tests with say a 32/64 (about 12mm) choke may be more telling.