Amplitude Energy has completed and cased its Annie-2 development well offshore Victoria, Australia, reporting preliminary data that indicates improved reservoir characteristics compared with the original Annie discovery.
The well reached a measured depth of 2,253m on 28 October. It was fitted with a subsea tree and underwent clean-up operations on 9 and 10 November.
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Amplitude Energy is now suspending the well ahead of its planned development within the East Coast Supply Project (ECSP).
According to the company, data gathered so far indicates higher permeability, porosity and deliverability than at the initial discovery.
Gas composition samples from Annie-2 were consistent with those obtained at the original Annie discovery.
Amplitude Energy said the drilling programme remains ahead of its planned schedule and budget. The company added that it had not used any of the general contingency allocated to the ECSP drilling programme.
Operations at Annie-2 were expected to finish during the week of the announcement. The Transocean Equinox rig is then due to move to the Nestor exploration prospect for the final well in the ECSP campaign.
Amplitude Energy managing director and CEO Jane Norman said: “It is exciting to see preliminary results from Annie indicate upside to our estimates from the initial discovery.
“Work on both Annie and Juliet Reserve estimates will continue over coming weeks, with results to date consistent with, or above, Amplitude Energy’s pre-drill volume expectations.
“This potentially provides an even stronger resource base for the ECSP, with further upside possible from success at the upcoming Nestor exploration well.
“It is also very pleasing to see excellent safety, environmental and cost performance during the drilling of Juliet and Annie. Costs to date are well below budget for both wells.”
Annie-2 is in permit VIC/L37 in Commonwealth waters, about 10km north of the planned connection point to the existing Casino, Henry, Netherby (CHN) pipeline.
The Annie-1 well discovered gas in the Waarre C reservoir in 2019.
Amplitude Energy has recorded a gross 2C contingent resource estimate of 65 PJ for Annie, equivalent to 32.4 PJ net to the company. It holds a 50% interest in VIC/L37, while O.G. Energy holds the other 50%.
In September this year, Amplitude Energy reached an FID on the development phase of the ECSP with first gas still targeted for calendar year 2028.
