Offshore Hydrocarbon Exploration Australia
Australia experienced both exciting discoveries and disappointing dry holes in 2018, drilling 60 exploration wells over the year. Buoyed by strong demand, policy change and recovering oil prices, Rystad expects to see this figure rise to 65 in 2019, with offshore exploration increasing to the highest level seen since 2014.
Hydrocarbon Discoveries in Australia in 2018
About 360 MMboe were discovered in Australia in 2018, at an exploration expense of close to US$1.4bn (US$850m offshore and US$550m onshore). Chief among 2018’s successes was Quadrant’s Dorado-1 well in the Bedout Basin (North West Shelf), which discovered 171 MMbo, 16 MMbc and 552 Bcfg (2C), making it 2018’s 12th largest discovery globally. Quadrant has now turned to the Apus prospect, where it hopes to unlock over 750 MMboe, although drilling is not expected until 2021.
In contrast, ExxonMobil and BHP’s much-hyped 2–3 Tcf Dory prospect in Victoria’s Bass Straight came up dry, with both wells, Baldfish-1 and Hartail-1, plugged and abandoned as uncommercial. However, the joint venture plan to continue exploration within Dory’s permit area (VIC/P70), where further gas potential remains in the Angler (140 Bcf) and Archer-Anemone (175 Bcf) prospects.
High Expectations for Oil and Gas Exploration Activity in Australia in 2019
Strong market fundamentals and favourable policy change should see exploration expenditure in Australia more than double from 2018 levels in the next five years, reaching an annual spend of US$3.6bn by 2023.
Offshore, 2019–20 should see Equinor drill its long-awaited Stromlo-1 well in South Australia’s Ceduna Basin: the first well in the Great Australian Bight since Woodside’s Gnarlyknots 1A in 2003. However, there is strong community opposition to the project and NOPSEMA is yet to approve the well. Success here would be the first step to unlocking the Bight’s potential multi-billion boe resource.
2019 could prove transformational for Australia’s fledgling shale industry. The repeal of a fracking moratorium, in place in the Northern Territory since 2016, should result in at least four shale wells in the highly prospective McArthur Basin this year. Before the moratorium, Origin Energy conducted one of the largest fracture jobs ever undertaken in Australia on their Amungee NW-1H well in the MacArthur Basin, successfully flowing over 1 MMcfpd on test. This enabled Origin to book 6.6 Tcf of contingent resources in the play, and also acted as a proof-of-concept for the basin, representing the first extended commercial-level gas flow from shale in the state. Origin now plan to drill and frack two horizontal wells in 2019.
Following the success of its Northern Territory Tanumbirini-1 well in 2014, where the company reported gas over a 500m (gross) interval, Santos is expected to drill two horizontal appraisal wells in the McArthur Basin. Success here has the potential to kick-start a rapid development of the region.
Further Reading on Oil and Gas Exploration in Australia
Some recommended GEO ExPro reading relating to, or similar in content to, the exploration and production of oil and gas resources in Australia.
Hydrocarbon Prospectivity of the Offshore Canning Area in Western Australia
Said Amiribesheli, Discover Geoscience Pty Ltd; Andrew Weller, Searcher Seismic Pty Ltd
Recent petroleum discoveries, including the Dorado-1 well, in the Bedout Sub-Basin indicate a promising future for the hydrocarbon prospectivity of offshore Western Australia.
This article appeared in Vol. 15, No. 6 - 2018
Oil and Gas Exploration in Australia
Brought to you in association with NVentures
After several low years of oil and gas exploration activity in Australia, it looks as though drilling potential is picking up.
This article appeared in Vol. 15, No. 5 - 2018
Exploration Update: Australia
Brought to you by GEO ExPro and Drillinginfo
The Dorado-1 well discovers more oil in the Triassic Caley Sandstone Reservoir and gas condensate in the Baxter Member; exploration update for offshore Australia.
This article appeared in Vol. 15, No. 4 - 2018.
Hydrocarbon Potential of the Gulf of Papua
Said Amiribesheli, Dariusz Jablonksi & Andrew Weller; Searcher Seismic
Interpretation of new and reprocessed data reveals clear identification of promising plays.
This article appeared in Vol. 15, No. 2 - 2018