Precision pre-commissioning

Central to this effort was the repurposing of the offshore Stabroek Block’s Liza Phase 1 and 2 Projects, as a critical offshore hub enabling the redirection of natural gas from deepwater reservoirs to a new integrated natural gas liquid (NGL) plant and a 300 MW combined cycle power plant via a 200 km subsea pipeline.

At the heart of this transition was the need for precise, safe and expertly managed pre-commissioning of systems across two FPSO vessels and gas export infrastructure.

With a proven track record in complex offshore and subsea commissioning campaigns, EnerMech was selected to deliver a turnkey pre-commissioning solution. The scope was technically intensive and logistically demanding, yet strategically vital to ensure that the gas export pathway, from the FPSOs to the shores of the Demerara River, was ready to flow safely and reliably, marking the next phase in Guyana’s energy evolution.

From oil production to energy diversification

The significance of this project cannot be overstated. The Gas-to-Energy programme is a high-profile partnership with the Government of Guyana, intended to reduce domestic electricity costs and lower carbon intensity by switching from imported fuel oil to cleaner-burning natural gas. For EnerMech, the project represented a chance to demonstrate a long-term commitment to Guyana by delivering excellence in a politically sensitive, high-visibility programme that will shape the country’s energy future.

By ensuring the gas export infrastructure on the FPSOs was ready for handover, EnerMech played a pivotal role in unlocking a project that will power industries, reduce household energy bills and accelerate Guyana’s journey toward energy self-sufficiency.

EnerMech’s pre-commissioning work was multifaceted. The included dewatering, line conditioning, air drying, nitrogen packing, and critical valve testing, works that are essential to prepare the gas export lines and associated systems for safe operation. These works were complemented by topsides piping construction, flange management, nitrogen, and leak testing services to ensure gas tightness from source to shore.

A major innovation was the use of low-pressure air- drying techniques and the implementation of dust bag receivers for pigging operations which were selected to reduce environmental impact and mechanical risk. The EnerMech Control of Work System was deployed to provide real-time procedural control and safe execution throughout the operation.

Dedicated mobile nitrogen and high-flow air units were mobilised, including one of the largest high-pressure nitrogen/air packages ever deployed in Guyana. These bespoke assets allowed EnerMech to meet the high technical demands of the project while adapting to the limited infrastructure and logistical restrictions of the region.

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