ExxonMobil has reportedly reduced production output at its Liza-1 project offshore Guyana by at least 75% after it detected problems with the gas compressor.

Production has been temporarily reduced from 120,000 barrels per day (bpd) to 30,000bpd in order to maintain gas injection and fuel gas to the power generators, as well as to reduce flare.

The US-oil giant company said it encountered a problem with the compressor’s discharge silencer during the final testing phase of the reinstalled flash gas compressor on the Liza Destiny FPSO.

ExxonMobil public and government affairs adviser Janelle Persaud said: “Relevant Government agencies have been notified and we are continuing to work with officials to determine the next best steps.

“ExxonMobil Guyana is extremely disappointed by the design issues and continued underperformance of this unit, and will be working with the equipment manufacturer MAN Energy Solutions and the vessel’s operator, SBM, to rectify the situation.

“This performance is below ExxonMobil’s global expectations for reliability.”

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This is the third time the company has reduced output on the Liza Destiny FPSO vessel due to problems associated with the gas compressor since its commissioning in December 2019.

The Liza-1 is the first development phase of Liza oil field located in the Stabroek Block, approximately 190km offshore Guyana.

ExxonMobil unit Esso Exploration and Production Guyana is the operator of the Stabroek Block with a 45% stake while Hess Guyana Exploration and CNOOC Nexen Petroleum Guyana hold 30% and 25% stake respectively.