CEO Michael Hession said the well testing underscored the regions prospectivity.
"We are excited by the well results and the enhanced development optionality that Triceratops gas can provide," he said.
The flow was stabilised over a number of five-hour intervals and measured through a 72/64 inch choke with the flow constrained by tubing.
Intersection of the Antelope-4 side track well with the reservoir occurred 36 metres higher than the original Antelope-4 penetration, recording a total depth of 2090 metres.
It is being prepared for casing before drilling through the reservoir.
Earlier this month, Hession said he welcomed the next step in the project's development and looked "forward to Total bringing its global LNG experience and resources to Elk-Antelope to develop what we anticipate will be the world's lowest cost new-build LNG project".
"This represents an important milestone for the Papua LNG project as the joint venture continues to drive towards the earliest practical development of the Elk-Antelope resource."
Editor's note - correction:
Details from the original article "Side track test successful " on the Monday September 21 newsletter, was incorrect, and has since been corrected as follows:
Flow testing was done on the Triceratops and not the Antelope-4 side track well.
The new article "Triceratops test successful" can now be found on the PNG Industry News website with the new details.
The Editor wishes to apologise for this oversight.