The retention licences, RL 3 and RL 4, were granted 6 March 2013 and consist of 6 and 8 blocks respectively, covering a combined area of approximately 1,004 km².
|Location||Operator||CTP Consolidation Entity||Other JV Participants|
|RL 3||1,004||Amadeus Basin NT||Central||100||100||–||–|
|RL 4||Amadeus Basin NT||Central||100||100||–||–|
Description and Geology
The Ooraminna 1 well was drilled in 1963 to test 350 metres of mapped closure of the large Ooraminna surface anticline. While drilling the well, an uncommercial flow of methane gas was recorded in the Neoproterozoic Pioneer Sandstone. A second well with deviated trajectory was drilled by Central in 2010 and flowed gas at 150 Mcfd at around 2,000 metres sub-surface. Gas was also observed in the shallower Arumbera Sandstone between 470 and 520 metres.
Two play types are being evaluated by integrated data review to identify further well locations. The gas bearing Pioneer Sandstone is believed to be more intensely fractured in the crestal area, which could favour higher gas flow rates. An untested intra-salt target has been identified beneath the existing Pioneer Sandstone gas discovery at Ooraminna Gas Field. The Gillen Member of the Bitter Springs Formation comprising carbonate and salt is a target in the Southern Amadeus area, and is present and within structure at Ooraminna.
Additional technical work is required to develop a drilling location. A program of seismic reprocessing and acquisition in conjunction with detailed surface mapping is planned to progress appraisal of the field.
Exploration opportunities at Ooraminna Gas Field have the potential to add significant reserves that could be processed using Dingo infrastructure, now owned by Central.