ExxonMobil Haimara Guyana: the company submitted an authorization request to the Environmental Protection Agency (EPA) to develop this gas-condensate discovery in the southeastern sector of the Stabroek block. If approved, it would be the consortium’s ninth development in that block, but the EPA first requires a full environmental impact assessment.
ExxonMobil Haimara Guyana: anchor field in southeastern Stabroek
The Haimara-1 well encountered approximately 63 meters of gas-condensate sandstone, drilled to a depth of 5,575 meters in 1,399 meters of water. ExxonMobil in Guyana envisions the field as the anchor for what it calls the “southeastern gas area,” which groups discoveries from Longtail to Haimara and plans to add the Pluma field via subsea tiebacks.
Alistair Routledge, president of ExxonMobil Guyana, explained the concept in March: “Haimara would be the anchor for the next project, just as Longtail is the anchor for a series of discoveries made in that area.” Routledge also noted that the company is evaluating transporting the gas by pipeline to Berbice, in line with the vision of President Irfaan Ali, who has stated that “Berbice must become a new industrial growth hub.”
EPA requires impact assessment for ExxonMobil Haimara Guyana
The environmental agency determined that the scale and duration of the ExxonMobil Haimara Guyana project could generate significant long-term environmental and socioeconomic effects, and therefore ordered a full EIA before making a ruling. The project scope includes well drilling and completion, installation of subsea equipment and flowlines, and the commissioning of a new FPSO. The distinction is key: ExxonMobil has applied for environmental authorization, but the permit has not been granted nor has the project been approved for construction.
As part of the process, the EPA scheduled public scoping meetings between June 1 and June 18, 2026, in multiple regions of the country, with a deadline for written submissions until June 21. The results of this consultation will inform whether the project can proceed to the next regulatory stage.
Fourth FPSO exceeds 900,000 barrels per day
The ExxonMobil Haimara Guyana project is being developed in parallel with an accelerated expansion of the block. With the start of operations of the fourth FPSO, One Guyana, the consortium’s production exceeded 900,000 barrels per day. ExxonMobil operates the block with a 45% stake, alongside Hess Guyana (30%) and CNOOC Petroleum Guyana (25%), aiming to reach 1.7 million barrels of oil equivalent per day by 2030. The incorporation of the fourth offshore development and control of the FPSO One Guyana consolidated the production platform upon which future projects are projected.
ExxonMobil Haimara Guyana: next in line for Stabroek
The Uaru and Whiptail projects are under construction with startups planned for 2026 and 2027, while Hammerhead—the block’s seventh development—was approved with an investment of $6.8 billion and an estimated production of 150,000 barrels per day by 2029. The ExxonMobil Haimara Guyana development would follow Longtail in that sequence. Routledge indicated that he expects to submit the field development plan in approximately twelve months, maintaining a schedule one year behind the Longtail project.
Unlike previous developments—focused on crude oil—Haimara primarily targets the gas market, with supply potential for the Berbice industrial hub and a possible second phase of the Gas-to-Energy project. The project must first pass the EIA process with the EPA before any final investment decision can be made.
Sources: Reuters, May 25, 2026; OilNOW, May 26, 2026; Brazil Energy Insight, March 30, 2026.
