Guyana’s offshore oil industry has rapidly evolved into one of the world’s most significant deepwater developments, with production from the ExxonMobil-operated Stabroek Block averaging 903,000 barrels per day (b/d) in April.
While ExxonMobil and its co-venturers Hess and CNOOC invest in the development of offshore resources, several tier 1 contractors provide the infrastructure, logistics, technology, and specialized services that support those operations. Here are some of the key tier 1 contractors operating in Guyana’s offshore oil industry.
Guyanese tier 1 contractors
Among the most prominent local contractors is Guyana Shore Base Inc. (GYSBI), the country’s premier shore base facility. Located just south of Georgetown, GYSBI supports offshore operations through four berths that facilitate the movement of chemicals, fuel and critical offshore supplies. ExxonMobil utilizes the facility for offshore material loadouts, helping sustain continuous operations across its growing fleet of production vessels.
Over the years, GYSBI has expanded into a major integrated logistics hub serving multiple oil and gas clients across a 140-acre development. The company has also emphasized workforce development, recruiting and training Guyanese personnel while maintaining international operating standards.
Vreed-en-Hoop Shorebase Inc. (VEHSI) has become another important logistics partner supporting ExxonMobil’s offshore developments. The facility was established in 2024 through a partnership between Guyanese-owned NRG Holdings and Belgian marine engineering company Jan De Nul.
ExxonMobil awarded VEHSI a contract following a competitive bidding process to support the Yellowtail project and future developments in the Stabroek Block. Located on the West Bank of Demerara, the facility was designed to provide shore base and logistics services for major offshore projects and subsea developments.
G-Boats Inc., a joint venture between Edison Chouest Offshore and John Fernandes Limited, plays a critical role in offshore marine support since the early days of Guyana’s oil industry. Through its G-Port facility in Kingston, Georgetown, the company provides vessel and logistics services that support exploration and production activities in the Stabroek Block.
Since opening in 2018, G-Boats has built a fleet of more than 18 vessels operating offshore Guyana under contracts supporting ExxonMobil and its co-venturers. The company’s vessels transport personnel, supplies and equipment to offshore installations, making it one of the most visible Guyanese participants in the sector.
Environmental services are largely supported by Sustainable Environmental Solutions (SES), which operates a waste treatment facility dedicated to offshore oil and gas activity. The company handles hazardous and non-hazardous waste streams, provides tank-cleaning services and ensures environmentally compliant waste disposal.
SES recently achieved 100% local content in the management and operation of its facility, with Guyanese professionals occupying both technical and leadership positions.
International tier 1 contractors
A key company regarding offshore production systems is SBM Offshore, one of the most important international contractors supporting ExxonMobil’s operations. The company designs, builds, installs and operates the floating production, storage and offloading (FPSO) vessels that process Guyana’s offshore oil production.
SBM Offshore currently operates FPSOs including Liza Destiny, Liza Unity and Prosperity. The company’s newest delivery, ONE GUYANA, entered service in 2025 to execute production from the Yellowtail development, adding 270,000 b/d to Guyana’s offshore fleet.
MODEC is supporting the next generation of offshore projects through engineering, procurement, construction and installation contracts for FPSOs serving the Uaru and Hammerhead developments. The company completed the first steel cutting for the Hammerhead FPSO in February more than a month ahead of schedule.
The Hammerhead FPSO will also include a pipeline connection to support gas transport to shore, as part of the Gas-to-Energy project.
SLB has established one of the largest technology footprints in Guyana’s offshore sector. The company supplies drilling, well construction, completion, production and digital technologies supporting ExxonMobil’s expanding development program.
Earlier this year, ExxonMobil Guyana and SLB reported the successful deployment of autonomous drilling technology offshore Guyana. More than 93% of the operations were executed autonomously while being monitored from an onshore center, demonstrating how advanced technologies are helping improve well delivery efficiency in the Stabroek Block.
Halliburton remains another major technology and services provider supporting Guyana’s offshore developments. The company has operated in Guyana since 2015 and provides drilling, cementing, stimulation, reservoir evaluation and completion services.
In March, Halliburton and ExxonMobil completed what they described as the industry’s first fully automated closed-loop well placement operation offshore Guyana. The project integrated geological data, well placement decisions and rig control systems in real time, eliminating traditional delays between subsurface analysis and drilling execution.
TechnipFMC has become one of the most consistent contractors across ExxonMobil’s offshore developments. The company supplies critical subsea production equipment, including trees and manifolds installed on the seabed to regulate the flow of oil and gas from offshore wells.
TechnipFMC has secured every subsea production system contract awarded by ExxonMobil Guyana, beginning with the Liza 1 development in 2017 and continuing through the Hammerhead project. Its equipment forms a core component of the subsea infrastructure that enables production from Guyana’s deepwater reservoirs.
Saipem focuses on the physical installation of subsea infrastructure. Its vessels lay flowlines along the seabed and install risers that transport hydrocarbons from wells to FPSOs operating at the surface.
The company has supported multiple Stabroek Block developments and last year completed the first complex subsea structure ever built in Guyana. The pipeline end termination structure will form part of the subsea network supporting gas reinjection operations at the Uaru development, which is expected to begin production later this year.
Subsea7 entered Guyana through the Gas-to-Energy project, where it installed approximately 119 kilometers of pipeline on the seabed in 2024. The company is also advancing the Subsea Integration Alliance, a strategic partnership with SLB that combines subsea engineering, installation and production system expertise.
Together, these contractors form part of the backbone of Guyana’s offshore oil industry, supporting exploration, production, logistics, environmental management and infrastructure development led by ExxonMobil.
