ExxonMobil begins oil production in Guyana

• Production for Liza Phase 1 to reach full capacity of 120,000 barrels of oil per day in the coming months
• Liza Phase 1 is the first of multiple offshore projects planned in the Stabroek Block
• More than 1,700 Guyanese have worked on ExxonMobil activities in Guyana

Production from the first phase of the Liza field, located in the Stabroek Block, is expected to reach full capacity of 120,000 barrels of oil per day in coming months, and the first cargo is set to be sold within several weeks.

“This historic milestone to start oil production safely and on schedule demonstrates ExxonMobil’s commitment to quality and leadership in project execution,” said Darren Woods, chairman and chief executive officer of Exxon Mobil Corporation. “We are proud of our work with the Guyanese people and government to realize our shared long-term vision of responsible resource development that maximizes benefits for all.”

The concept design for the Liza Phase 1 development project features the Liza Destiny floating, production, storage and offloading (FPSO) vessel moored 190 kilometers offshore Guyana, and four subsea drill centers supporting 17 wells.

Approximately 1,700 of ExxonMobil’s employees and other workers supporting its activities in Guyana are Guyanese – more than 50 percent of the total workforce. This number will continue to grow as additional operations progress. ExxonMobil and its direct contractors have spent approximately $180 million with more than 630 local suppliers since the first discovery in 2015.

“Through our continued workforce development and community investments, we are making a positive impact in Guyana,” said Rod Henson, president of ExxonMobil’s Guyana affiliate. “We are committed to the use of technology and continued innovation to achieve the highest standards for safety and environmental performance.”

A second FPSO, Liza Unity, with a capacity to produce up to 220,000 barrels of oil per day is under construction to support the Liza Phase 2 development, and front-end engineering design is underway for a potential third FPSO, the Prosperity, to develop the Payara field upon government and regulatory approvals. ExxonMobil anticipates that by 2025 at least five FPSOs will be producing more than 750,000 barrels per day from the Stabroek Block. The timely development of these additional projects will ensure that the local workforce and the utilization of local suppliers will continue to grow.

The current estimated discovered recoverable resource for the Stabroek Block is more than 6 billion oil equivalent barrels. Esso Exploration and Production Guyana Limited is operator and holds 45 percent interest. Hess Guyana Exploration Ltd. holds 30 percent interest and CNOOC Nexen Petroleum Guyana Limited holds 25 percent interest.

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Cautionary Statement: Statements of future events or conditions in this release are forward-looking statements. Actual future results, including project plans, schedules, capacities, and resource recoveries could differ materially due to changes in market conditions affecting the oil and gas industry or long-term oil and gas price levels; political or regulatory developments including obtaining necessary regulatory permits; reservoir performance; the outcome of future exploration and development efforts; technical or operating factors; the outcome of commercial negotiations; and other factors cited under the caption “Factors Affecting Future Results” on the Investors page of our website at www.exxonmobil.com. References to “recoverable resource” and similar terms in this release include quantities that are not yet classified as proved reserves under SEC rules but that are expected to be ultimately recoverable.

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