Description and Geology

The Southern Amadeus Basin is a large and underexplored region characterised by northwest trending structures in the northern area, and a central area dominated by an east-west central structural ridge or ridges. The southern area has a variety of structural styles including basement involved structural highs, compressional folds and salt-cored thrusted anticlines. The proven Larapintine petroleum system thins southwards. However, source rocks are also recorded deeper in the stratigraphic succession including in the Cambrian Tempe Formation and Chandler Salt, in the Neoproterozoic Aralka Formation, Finke Beds and Bitter Springs Formation, in particular in the basal Gillen Member and provide a source for gas charge.

EP 82

Gas was discovered at Magee‑1 in 1992, where a test at a depth of 2,340 metres flowed gas at a stabilised rate of 63 Mcfd, comprising natural gas, helium and nitrogen. Seismic data acquired to date indicate a possible updip location which requires additional seismic acquisition, programmed in Stage 2. A significant proportion of Stage 2 comprising 1,300 km 2D seismic will be acquired in this permit.

EP 105

This permit is immediately east of and geologically similar to EP 82.  A number of leads have been identified from potential field data, the extensive 2013 regional seismic program, and field (outcrop) mapping.

EP 112

This permit contains a variety of structural styles, and additional opportunities have been identified from potential field data and the extensive 2013 regional seismic program. A significant proportion of Stage 2 comprising 1,300 km 2D seismic will be acquired in this permit.

EP 125

In 2014, the joint venture operated by Santos drilled the exploration well Mt Kitty 1 to test a large basement structure with closure up to approximately 200 km2. The target Heavitree Quartzite reservoir was absent but gas flows were recorded from fractured igneous basement, opening up a new play type. The joint venture is evaluating well data to determine whether further appraisal of the structure is warranted. This permit contains a variety of structural styles, and additional opportunities have been identified from potential field data and the extensive 2013 regional seismic data. A proportion of Stage 2 seismic program comprising 1,300 km 2D seismic will be acquired in this permit.