Highlights

  • Karoon Energy (ASX:KAR) approved the Who Dat East development in the US Gulf of Mexico, with first production targeted for the second half of 2028.
  • The single-well subsea tieback is expected to deliver approximately 5,900 barrels of oil equivalent per day net to Karoon at peak production.
  • Karoon's net Capital Expenditure for the project is estimated at US$155 million to US$165 million.
  • The project targets a mid-case internal rate of return above 20 per cent through connection to existing Who Dat infrastructure.

For an oil producer, the challenge is often balancing growth with capital discipline. Karoon Energy (ASX:KAR) has spent much of 2026 focusing on operational performance at its Brazilian assets, capital returns and selective growth opportunities. The decision announced on 12 August to sanction the Who Dat East development in the US Gulf of Mexico adds a new production pathway through a relatively small-scale subsea tieback. The project uses existing infrastructure, limiting upfront requirements while adding another source of future production alongside the company's Brazilian operations.

Latest Development

The joint venture behind the Who Dat field has taken a final Investment decision to develop Who Dat East, a single-well subsea tieback located in Mississippi Canyon Block 509 in approximately 1,300 metres of water. The project follows a discovery well drilled in 2024 and will connect through a 29-kilometre pipeline to the existing Who Dat floating production system.

Operator LLOG holds a 40 per cent working interest, Karoon's US Subsidiary holds 40 per cent and Westlawn Americas Offshore holds the remaining 20 per cent. First production is targeted for the second half of 2028. The development approach avoids the requirement for new surface infrastructure by using existing processing facilities.

What the Numbers Show

Who Dat East is expected to deliver peak gross production of approximately 6,500 barrels per day of liquids plus 50 million cubic feet per day of gas. The production mix is expected to comprise around 45 per cent liquids and 55 per cent gas.

Net to Karoon, production is expected to reach approximately 5,900 barrels of oil equivalent per day. Net capital expenditure is estimated at US$155 million to US$165 million, with only US$15 million to US$20 million expected during the second half of 2026. The project carries a mid-case internal rate of return above 20 per cent.

Karoon's booked contingent resources associated with the field stood at 15.7 million barrels of oil equivalent on a 2C basis at the end of 2025. The subsea tieback structure allows development through existing infrastructure rather than a standalone offshore project.

Why It Matters

Who Dat East changes Karoon's production profile by adding another operating region alongside its Brazilian Baúna assets. The company has historically relied heavily on Baúna, where production reached around 22,000 barrels per day following operational improvements and FPSO performance upgrades.

The US Gulf of Mexico provides a second operating base in a mature offshore region with existing infrastructure and potential tieback opportunities. By sanctioning Who Dat East, Karoon converts part of its Gulf portfolio from an option into a committed development project.

The project also reflects a focus on smaller developments that can add production without requiring large-scale infrastructure investment.

Growth Catalysts

The main catalyst is delivery against the Who Dat East development schedule, including drilling, completion, pipeline installation and connection to the existing Who Dat floating production system. Beyond this project, Karoon has identified further tieback opportunities within the Gulf of Mexico that could support additional production growth.

Karoon also recently brought its Who Dat A1 sidetrack online, adding approximately 1,700 barrels per day net. The company is targeting FY26 group production of 7.2 million to 8.2 million barrels of oil equivalent.

Improving free Cash Flow from Baúna operations, potential oil price support and ongoing capital management initiatives provide additional factors that could influence Shareholder returns.

Risks Investors Should Watch

Oil prices remain the primary external risk. Karoon's Earnings and project returns are linked to Brent pricing, meaning weaker oil markets could reduce free cash flow and affect Who Dat East economics.

Execution risk is also relevant, as offshore subsea developments can face schedule delays, cost increases and technical challenges. First production is not expected until the second half of 2028, leaving time for changes in service costs and market conditions.

Karoon also carries Debt exposure, with approximately US$350 million of drawn debt against around US$80 million of cash at the end of June. While Liquidity remains available, Leverage increases sensitivity to Commodity cycles. Baúna performance also remains important given its contribution to current production.

What Happens Next

The next milestones will focus on execution of the Who Dat East development plan. Investors will monitor drilling and completion activities, pipeline installation progress and the timing of the subsea connection ahead of the targeted 2028 start-up.

Near-term results will also provide insight into Baúna production performance, free cash flow generation and capital allocation decisions. Further Gulf of Mexico tieback approvals would provide evidence that Karoon's development strategy can be repeated across the region.

Oil prices will continue to influence how the market values both existing production and future developments.

Conclusion

Karoon Energy (ASX:KAR) has approved the Who Dat East development as a targeted addition to its US Gulf of Mexico portfolio, using existing infrastructure to support a lower-capital production project. The development is expected to add approximately 5,900 barrels of oil equivalent per day net to Karoon and carries a mid-case internal rate of return above 20 per cent. However, the project remains exposed to oil prices, execution timelines and offshore development risks. The next phase will focus on delivering the project while maintaining performance from the company's existing Brazilian operations.