Road to shale riches28 Feb 2020 19:34
Australia rejoins road to shale riches
Shale gas developers are beginning to ramp up their exploration efforts following the end of a freeze on fracking approvals in the Northern Territory
Australia’s shale gas sector is showing its first true signs of activity since the Northern Territory (NT) decided to lift its two-year moratorium on hydraulic fracturing in 2018.
The Darwin government’s ban on fracking, introduced in 2016, derailed Santos and Origin Energy’s exploration plans, with both companies having only drilled a handful of wells up to that point. The decision, prompted by growing environmental opposition to fracking, froze development on the federal territory’s estimated 500tn ft³ shale gas resource.
The NT lifted its ban after a 15-month independent scientific inquiry reported in March 2018 that the risks surrounding fracking could be mitigated if its 135 recommendations were implemented. The government adopted the inquiry’s proposals, lifted the moratorium and was then able to approve the new work programmes of leading Australian independent Santos and E&P company (and energy retailer) Origin Energy in June 2019.
Santos revealed in its annual report, published on February 20, that its production test, at an almost six-year old well in the MacArthur Basin, has delivered better than expected flow tests. Meanwhile, Origin successfully completed the first of a two-well drilling programme in the Beetaloo sub-basin. Australian independent Empire Energy, meanwhile, reported in January that its recently completed 2D seismic study had led to the identification of two drilling targets on its Beetaloo acreage.
Project progress
Santos also noted in its annual report that it has completed a diagnostic fracture injection test (DFIT) and four-stage stimulation of the vertical Tanumbirini-1 well in exploration permit 161 (EP161). Santos operates EP161, EP162 and EP189—which form the Beetaloo/McArthur Project—with a 50pc stake, while NT-focused private E&P company Tamboran Resources owns the remaining interest.
The vertical well test of Tanumbirini-1, which was originally spudded in June 2014, flowed at more than 1.2mn ft³/d, the company says. Santos intends to drill two appraisal wells in EP161 once the NT’s wet season ends in April.
500tn ft³ - Northern Territory shale reserves
Origin, meanwhile, has successfully drilled, cased and cemented the Kyalla 117 N2-1H ST2 well in EP117, junior partner Falcon Oil & Gas announced on February 20. The well, which targets the Lower Kyalla Formation, has been drilled to a total measured depth of 3,809m, including a 1,579m lateral section drilled at 90 degrees.
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