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Petrobras Announces Second Oil-Bearing Interval in the Morpho Well off Amapá
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Second Oil-Bearing Interval Discovered in the Morpho Well
On October 2, 2026, Petrobras reported that drilling of the Morpho exploration well (well 1-BRSA-1405-APS) in block FZA-M-59 intersected a second oil-bearing interval. The well is in ultra-deep water of about 2,886 m (9,469 ft), roughly 175 km off the coast of Amapá. The interval was identified through electric well logs, rock indications and fluid samples. Laboratory analysis is ongoing; no volume estimates or commercial assessment have been disclosed.
Background and Strategic Context
The Morpho well lies in the Foz do Amazonas basin, part of Brazil’s Equatorial Margin, a frontier highlighted after large finds in Guyana and Suriname. A study by the energy ministry’s agency EPE estimates the basin’s recoverable potential at up to 10 billion barrels of oil equivalent. Brazil’s regulator ANP reported the country ended 2025 with roughly 70 billion barrels of proved, probable and possible reserves. Petrobras views the block as a key element of its strategy to replace declining pre-salt reserves.
Legal and Environmental Challenges
Federal prosecutors (MPF) have sought to halt drilling. On September 28, 2026, the MPF asked the TRF-1 appeals court to suspend all drilling activities, citing an 18,000-litre spill of drilling fluid in January and demanding new environmental studies for the planned expansion to four wells through 2029. The federal environmental agency Ibama granted the original licence in October 2025 and cleared three additional wells in September 2026. Petrobras maintains its internal studies found no direct social or environmental impact and that the licence remains valid unless a court suspends it.
Resource Potential and Economic Implications
Petrobras has not released flow-rate or reserve figures for either the August or October discoveries. The EPE estimate of 10 billion barrels is an upper bound, not a guaranteed reserve. Petrobras announced an investment of $2.5 billion in the region between 2026 and 2030, underscoring its commitment despite legal challenges. The company’s broader exploration portfolio includes operations in Brazil, China, the United States, Europe and Asia.
Official Statements and Company Response
Petrobras said drilling will be completed safely and with respect for the environment and local communities. CEO Magda Chambriard held a press briefing in Rio de Janeiro at 15:00 local time on October 2, 2026 to detail the discovery. The company emphasized that laboratory analyses are ongoing and that the findings will be integrated with existing data to evaluate the petroleum system of the basin.
Conflicting Reports & Gaps
As of October 2, 2026, no court ruling on the MPF’s latest appeal had been reported, and Petrobras had not provided a timetable for the three additional wells it plans to drill. Resource estimates for the newly identified interval remain undisclosed, and the required environmental impact assessments have not been publicly released.
What’s Next
Petrobras intends to finish drilling the Morpho well and then evaluate the identified formations. The company plans to commence drilling of three additional wells in the block starting in January 2027, pending any court decisions that might affect the licence. Ongoing laboratory analyses will determine whether the new interval meets commercial criteria, after which Petrobras will decide on development actions.