> ## Content Index > Fetch the complete content index at: https://www.lacaribenanews.com/llms.txt > Use this file to discover other available public pages before exploring further. # Petrobras Has Announced Three Oil Discoveries Off Amapa. All Three Are in the Same Well. - URL: https://www.lacaribenanews.com/petrobras-morpho-three-intervals-one-well-foz-do-amazonas-2026/ - Published: 2026-11-01T14:09:24.000Z - Updated: 2026-11-01T14:09:26.000Z - Description: Petrobras told the market on 29 October 2026 that it had found a third oil-bearing interval in the Morpho well, block FZA-M-59, off Amapa. The earlier notices of 14 August and 2 October concern the same well. None gives a recoverable volume. - Author: Theon Alleyne - Tags: Brazil, Oil and Gas, Exploration, Guyana, Business **Quick summary:** Petrobras told the market on 29 October 2026 that it had found a third oil-bearing interval in the Morpho well, block FZA-M-59, off Amapá. The earlier notices of 14 August and 2 October concern the same well. None gives a recoverable volume or says the find is commercial. The well is now being plugged, which is routine for exploration. By LCN Business Desk Three notices to the market in eleven weeks, each reporting oil off the Brazilian state of Amapá, read as a run of success in a frontier basin. They describe one borehole. The Morpho well, formally 1-BRSA-1405-APS, sits in block FZA-M-59 in ultra-deep water at 2,886 metres. Petrobras announced oil there on 14 August, again on 2 October, and again on 29 October. What changed between the three announcements was the depth at which the company was looking, not the location. ## What exactly did Petrobras report? Oil-bearing intervals, found one below another in a single well, with no volume attached to any of them. The [notice of 2 October](https://www.sec.gov/Archives/edgar/data/0001119639/000129281426004836/pbr20261002%5F6k.htm?ref=lacaribenanews.com) describes "another oil-bearing interval in the Morpho well", encountered by drilling deeper after the August find, and identified through electrical logs, rock sample indications and fluid samples. It records that the August analyses had confirmed good oil quality. The [notice of 29 October](https://www.sec.gov/Archives/edgar/data/0001119639/000129281426005052/pbr20261029%5F6k.htm?ref=lacaribenanews.com) reports a further oil-bearing interval, confirmed through continued evaluation of other intervals of interest in the same well. **None of the three filings gives a recoverable volume, and none says the discovery is commercial.** Drilling and data acquisition are complete. The only operation left on Morpho is abandonment. The drillship does not stay. After the well is plugged, it moves south to the Potiguar Basin off Rio Grande do Norte to drill a separate prospect, Mãe de Ouro. ## Is an abandoned well a failure? No, and reading it that way would be as wrong as reading three intervals as three fields. An exploration well is drilled to find out what is there. Once it has logged the rock and sampled the fluid, it has done its job, and plugging it is routine rather than a verdict. Production, if it ever comes, is drilled later from different wells placed on the strength of what this one learned. What the abandonment does settle is the timetable. Nothing about these announcements puts oil on a ship. Between a logged interval and a producing field sit appraisal drilling, a declaration of commerciality, a development plan, a final investment decision and construction, and Petrobras has not published a figure that would let anyone outside the company judge the first of those steps. ## Why does a well off Amapá matter in Georgetown? Because the basin it sits in is described in the geological literature as the continuation of the margin that contains Guyana and Suriname. Foz do Amazonas lies on Brazil's Equatorial Margin. A 2021 study of the basin's north-western plays describes Foz do Amazonas and Pará-Maranhão as the continuation of the Guyana-Suriname margin, and a 2022 conference paper argues that Late Cretaceous turbidite reservoirs there could resemble the Guyana-Suriname discoveries, on a play never drilled in deep water on the Brazilian side. The literature attaches two cautions to that comparison. The same 2021 study records that Foz do Amazonas has predominantly terrestrial-derived kerogen, Type III, rather than the marine source rock found in basins to the south-east. For an oil analogue that is a material difference, because the kind of organic matter in the source rock bears on what the rock generates. And a great deal of the material drawing the comparison is published by operators, seismic data vendors and conference presenters who are marketing the basin. The comparison may well be sound. It is being made, in part, by people who are selling it. ## What does it change for Guyana and Suriname? Nothing yet, and the reason is the absence of numbers rather than the presence of a rival. A commercial discovery on the Brazilian end of the same trend would eventually compete for the rigs, the vessels, the service contractors and the specialist crews that the Guyana-Suriname basin currently draws on, and it would put a third national regulator into a market where [Suriname has required local preference since 1990 with no percentages, no categories and no penalties](https://www.lacaribenanews.com/suriname-petroleum-law-local-content-granmorgu-first-oil-2026/). None of that follows from an oil show with no volume attached. The nearer lesson is about reading announcements. LCN has reported that [ExxonMobil's exploration chief said there was a new Stabroek discovery while the company's own discovery list still ended in 2022](https://www.lacaribenanews.com/exxonmobil-exploration-chief-stabroek-discovery-no-announcement-2026/), and that [BP and Woodside exited the Calypso gas project in Trinidad](https://www.lacaribenanews.com/bp-woodside-calypso-trinidad-gas-project-exit-2026/) after years of appraisal. In this basin the gap between a statement about hydrocarbons and a barrel sold is measured in years and several formal decisions, each of which is published when it happens. For anyone pricing exposure to the trend, the document to wait for is not another notice of an oil-bearing interval. It is a declaration of commerciality. ### The entities - **Petróleo Brasileiro S.A. (Petrobras)** is the Brazilian state-controlled oil company, SEC filer CIK 0001119639, and operator of block FZA-M-59. - **Morpho**, formally 1-BRSA-1405-APS, is the exploration well in which all three oil-bearing intervals were reported. - **Block FZA-M-59** is the licence off the coast of Amapá in which the well sits. - **Foz do Amazonas Basin** is the north-western basin of Brazil's Equatorial Margin. - **Potiguar Basin**, off Rio Grande do Norte, is where the drillship moves next, to the Mãe de Ouro prospect. - **Form 6-K** is the filing by which a foreign private issuer furnishes material information to the United States Securities and Exchange Commission. ### What the title card says - Headline: Petrobras has announced three oil discoveries off Amapá, and all three are in the same well. - Notices to the market: 14 August, 2 October and 29 October 2026, all concerning the Morpho well. Source: Petrobras Form 6-K filings. - Well: Morpho, 1-BRSA-1405-APS, block FZA-M-59, ultra-deep water off Amapá, 2,886 metres water depth. Source: the same filings. - Recoverable volume published: none, in any of the three notices. - Statement of commerciality: none, in any of the three notices. - Status of the well: drilling and data acquisition complete, abandonment operations remaining. - Next location for the drillship: the Mãe de Ouro prospect, Potiguar Basin, off Rio Grande do Norte. ## Frequently Asked Questions Has Petrobras made three separate oil discoveries off Amapá? It has announced three oil-bearing intervals, and all three are in the same well, Morpho, in block FZA-M-59\. The notices are dated 14 August, 2 October and 29 October 2026\. They are not three fields and not three wells. How much oil has been found? Petrobras has not said. None of the three notices gives a recoverable volume estimate, and none states that the discovery is commercial. The company reported in August that analyses had confirmed good oil quality. Why is the well being abandoned? Because its purpose was exploration. Drilling and data acquisition are complete, so the remaining operation is plugging it, which is routine for an exploration well rather than a judgement on the result. Any production would come later from different wells. Is the Foz do Amazonas basin the same as Guyana's? Published studies describe Foz do Amazonas and Pará-Maranhão as the continuation of the Guyana-Suriname margin, and a 2022 conference paper argues the reservoirs could be comparable. A 2021 study also records that Foz do Amazonas has predominantly terrestrial-derived source rock rather than marine, which is a material difference, and much of the comparison is published by parties marketing the basin.