What is Distributed Acoustic Sensing (DAS) and why is ExxonMobil using it in Guyana?

Distributed Acoustic Sensing (DAS) is an advanced technology that turns fiber-optic cables into thousands of highly sensitive seismic sensors. ExxonMobil is deploying it in the Stabroek block to obtain ultra-high-resolution, continuous imaging of the reservoir, which helps track fluid movements and optimize oil recovery from their deepwater wells.

Who are the partners involved in the Stabroek block development?

The Stabroek block is operated by ExxonMobil's affiliate, ExxonMobil Guyana Limited, which holds a 45% interest. Its consortium partners are Hess Guyana Exploration Limited with a 30% interest, and CNOOC Petroleum Guyana Limited holding the remaining 25% interest.

How does this contract benefit Shearwater GeoServices?

This contract strengthens Shearwater's position as a premier provider of high-tech marine geophysics and validates its investment in DAS technology. Securing a contract with a supermajor like ExxonMobil in a high-profile basin like Guyana enhances Shearwater's market credibility and positions it for future deepwater monitoring contracts globally.

Offshore Energy · June 11, 2026 (Jun 11) · 1 min read

ExxonMobil puts Shearwater on seismic duty offshore Guyana

ExxonMobil

Analysis

AI-assisted analysis · reviewed by Yuri Kan

ExxonMobil's deployment of Shearwater GeoServices' advanced Distributed Acoustic Sensing (DAS) technology in Guyana's Stabroek block represents a significant shift toward high-definition reservoir monitoring. By utilizing fiber-optic cables for seismic data acquisition, the supermajor aims to optimize recovery rates from its massive deepwater discoveries. This contract underscores the industry's growing reliance on cutting-edge geophysical techniques to manage complex, multi-billion-barrel assets efficiently.

Key Facts

Shearwater GeoServices has been awarded a new marine seismic contract by ExxonMobil Guyana, a subsidiary of the US energy giant.
The project will utilize advanced Distributed Acoustic Sensing (DAS) technology to acquire high-resolution seismic data.
The operations will take place within the prolific Stabroek block, located offshore Guyana, which covers approximately 6.6 million acres.
ExxonMobil serves as the operator of the Stabroek block with a 45% working interest, alongside partners Hess (30%) and CNOOC (25%).
This campaign aims to enhance reservoir characterization and monitor fluid movements in the block's deepwater fields.
The deployment highlights Shearwater's specialized capabilities in integrating fiber-optic technology with traditional marine seismic acquisition.

Background & Context

The Stabroek block offshore Guyana is one of the most significant oil discoveries of the past decade, boasting over 11 billion barrels of oil equivalent in recoverable resources. ExxonMobil and its partners have rapidly fast-tracked development in the basin, transitioning from first discovery in 2015 to producing over 600,000 barrels of oil per day by 2024. As these deepwater reservoirs mature, operators are increasingly adopting permanent reservoir monitoring (PRM) and DAS technologies to track pressure changes and optimize production strategies.

Market Impact

The integration of Shearwater's DAS technology will allow ExxonMobil to obtain highly precise, time-lapse (4D) seismic images of the reservoir, reducing geological uncertainty and minimizing dry-hole risks for future infill drilling. For the offshore services sector, this contract solidifies Shearwater's position as a leader in high-end geophysics and validates the commercial viability of fiber-optic seismic monitoring in deepwater environments. Furthermore, successful deployment will likely prompt other global operators to adopt similar DAS solutions to maximize the economic life of their deepwater assets.

What to Watch

Looking ahead, the industry will watch for the initial data processing results from this DAS campaign to assess the technology's efficiency compared to conventional ocean-bottom node (OBN) surveys. ExxonMobil is expected to integrate these seismic insights into its upcoming development phases in the Stabroek block, including the Whiptail and Jaguar projects. Additionally, this campaign could pave the way for broader commercialization of fiber-optic sensing across other deepwater provinces globally.

Frequently Asked Questions

What is Distributed Acoustic Sensing (DAS) and why is ExxonMobil using it in Guyana?: Distributed Acoustic Sensing (DAS) is an advanced technology that turns fiber-optic cables into thousands of highly sensitive seismic sensors. ExxonMobil is deploying it in the Stabroek block to obtain ultra-high-resolution, continuous imaging of the reservoir, which helps track fluid movements and optimize oil recovery from their deepwater wells.
Who are the partners involved in the Stabroek block development?: The Stabroek block is operated by ExxonMobil's affiliate, ExxonMobil Guyana Limited, which holds a 45% interest. Its consortium partners are Hess Guyana Exploration Limited with a 30% interest, and CNOOC Petroleum Guyana Limited holding the remaining 25% interest.
How does this contract benefit Shearwater GeoServices?: This contract strengthens Shearwater's position as a premier provider of high-tech marine geophysics and validates its investment in DAS technology. Securing a contract with a supermajor like ExxonMobil in a high-profile basin like Guyana enhances Shearwater's market credibility and positions it for future deepwater monitoring contracts globally.

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