Bass Oil Limited (ASX:BAS): Bunian-6 Drilling and Cooper Basin Gas Development

Aditi Sarkar

09 October 2026 10:21 PM AEDT

Bass Oil Limited (ASX:BAS): Bunian-6 Drilling and Cooper Basin Gas Development

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Highlights

Bunian-6 intersected oil-bearing intervals in the TRM3 and K1 reservoirs.
The company holds a 55% operating interest in Indonesia’s Tangai-Sukananti KSO.
June 2026 group production averaged 225 barrels of oil per day.
The Vanessa Acquisition adds a potential Cooper Basin gas production pathway.
The Kiwi gas project remains part of the company’s development programme.

Bass Oil Limited (ASX:BAS) is an Australian-listed oil and gas producer with operations in Indonesia and Australia’s Cooper Basin. Its portfolio includes producing oil fields, the Tangai-Sukananti KSO in South Sumatra, and gas development Assets in South Australia. During 2026, Bass Oil advanced Bunian-6 drilling while continuing work on the Vanessa and Kiwi gas projects.

Bunian-6 Well Results and Development Plan

In an update released on 26 August 2026, Bass Oil (ASX:BAS) reported that Bunian-6 had intersected oil pay consistent with pre-drill expectations in the TRM3 and K1 sandstone reservoirs, based on wireline logs. The well reached a total depth of 1,807.9 metres before logging. The company outlined plans to run and cement production casing, then complete the well as a tandem oil producer from the two intervals.

At the time of that update, management expected Bunian-6 to enter production in early September. It estimated that the well could lift Indonesian output from 250 to 750 barrels of oil per day on a 100% project basis. These figures were company expectations, not confirmed post-commissioning production rates. Bass Oil (ASX:BAS) is operator of the KSO and holds a 55% interest; actual operating performance depends on completion and reservoir results.

Production Profile and June Operating Figures

Bass Oil (ASX:BAS) reported June 2026 group production of 6,746 barrels, equivalent to an average 225 barrels of oil per day. Cooper Basin output totalled 2,527 barrels, while Indonesian oil production was 4,219 barrels net to the company. June sales Revenue was A$561,477 net to Bass, reflecting activity before Bunian-6 was scheduled to enter production.

The difference between gross KSO production and the company’s attributable interest matters when interpreting Bunian-6 output estimates. The intended well contribution should therefore be considered alongside the project ownership structure and subsequent operating reports, rather than treated as wholly attributable to shareholders in Bass Oil (ASX:BAS).

Cooper Basin Projects and Gas Commercialisation

Alongside its Indonesian operations, Bass Oil (ASX:BAS) owns the Worrior and Padulla oil fields in the Cooper Basin. The company completed its Vanessa transaction in June 2026 and reported that engineering work to recommission the Facility was underway. Its 2026 corporate presentation identified Vanessa as a pathway towards gas sales into the East Coast market, subject to operational and commercial arrangements.

The Kiwi gas field is another focus. In 2026, the company highlighted a A$3.5 million South Australian Government grant for the Kiwi project and continued considering development and funding options. Progress at Vanessa and Kiwi depends on engineering, approvals, commercial agreements and financing decisions.

Operational Risks and Reporting Milestones

Development drilling carries uncertainty around reservoir performance, well completion, production reliability and expenditure. Bass Oil (ASX:BAS) also faces commodity-price variability, regulatory requirements in Indonesia and Australia, and Capital commitments associated with gas infrastructure. Announcements confirming Bunian-6 commissioning, sustained well output, and the status of Vanessa and Kiwi would clarify the timing and scale of potential production changes.

Key Insights

Bass Oil (ASX:BAS) combines established oil production in Australia and Indonesia with additional development opportunities. The August Bunian-6 update established the reported reservoir intersections and expected production contribution, while June operations provide a factual baseline. The distinction between projected and achieved output remains central to assessing subsequent disclosures. The Cooper Basin gas projects introduce separate engineering and commercial milestones.

FAQs

Q: What is Bass Oil’s ASX ticker?

A:Bass Oil Limited is listed on the Australian Securities Exchange under ASX:BAS.

Q: What did Bunian-6 encounter?

A:The company reported oil pay in the TRM3 and K1 sandstone reservoirs in August 2026.

Q: What interest does Bass hold in Tangai-Sukananti?

A:Bass operates the South Sumatran KSO and holds a 55% interest.

Q: What was group production in June 2026?

A:Bass reported 6,746 barrels of oil, averaging 225 barrels per day.

Q: Which Australian gas assets are being developed?

A:Its 2026 activities include the Vanessa and Kiwi gas projects in the Cooper Basin.

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