During the eight-hour flow test through a 3/8 inch choke and a 16 hour shut-in period, the test string circulated four barrels (oil equivalent) of heavy hydrocarbon gas, 23 barrels of light crude oil, three barrels of mud-contaminated oil and 39 barrels of formation water, the company reported.
Oilex will now drill to the planned total depth of 1590 metres and run wireline logs. The well is currently at 1582.5 metres depth.
“Once those data have been acquired, consideration will be given to additional operations at Donga-3,” the company said.
Spudded on October 13, the well was aimed at testing an interpreted updip location of the basal Moolayember sandstone, which recovered light sweet crude oil and high water rates in the Donga-1 and Donga-2 wells drilled in 1969 and 1979 respectively.
Donga-3 also has secondary targets in the Hutton, Basal Evergreen and Boxvale sandstones.
The seismic-interpreted structure contains a potential three million barrels of oil, said Oilex.
Participants in ATP 805P Block, Donga-3 well are: Oilex NL (operator and 42.5%), Bow Energy Ltd (42.5%) and Victoria Petroleum NL (15%). Oilex is currently acquiring additional equity from Bow, while VicPet is acquiring a 7.5% interest from both companies.
