Exploration

As part of arrangements in the purchase of Central’s interest in Mereenie Oil and Gas Field, Central (Operator) has a 100% interest in 20 graticular blocks excised from the Joint Venture with Santos in EP 82 surrounding the Dingo Gas Field.  This area of 1,492 km², referred to as EP 82DSA (Dingo Satellite Area), contains several leads identified on the existing sparse seismic grid as well as the Orange structure where gas was discovered in the Arumbera A1 Sandstone in Orange 2 in 1984. The proposed Orange 3 well, which is planned to air-drill the Arumbera Formation (drilled with conventional mud-based system and flowed gas to surface in Orange-2 at sub-commercial rates) and the Pioneer and Areyonga formations which flowed gas from the Ooraminna structure to the east. The Orange 3 well will target 401 PJ of mean prospective resource across these three formations, with FID expected following results from the Dingo Deep exploration well, to be drilled in mid 2022.

Due to the proximity to the Dingo Gas Field and associated infrastructure, these satellite prospects are very attractive to Central as they could provide incremental reserves/resources in the event of drilling success. Additional seismic is required to delineate these leads, which are currently estimated to be of a similar size to the Dingo Gas Field.

Dingo Deep exploration well will also be part of the proposed Amadeus exploration programme and will target 69 PJ of mean prospective resource from the Pioneer and Areyonga formations which flowed gas from the Ooraminna structure to the northeast (34.5 PJ net to Central).  Once the Pioneer and Areyonga formations have been evaluated, the well will be completed to produce from the Arumbera Sandstone. The Dingo Deep well will be drilled after the Palm Valley Deep well in mid-2022.