Chevron produces first gas from HPHT field in North Sea

Chevron North Sea has started production at Alder, a high-pressure, high-temperature (HPHT) gas condensate field in the Central North Sea.

A final investment decision for the Alder field was reached in January 2014. Chevron North Sea operates the project and has a 73.684 percent interest and its co-venturer is ConocoPhillips with 26.316 percent.

Alder is a single subsea well tied back, via a 28-kilometer pipeline, to the existing ConocoPhillips-operated Britannia platform, in which Chevron holds a 32.38 percent non-operated working interest.

The project has a planned design capacity of 110 million cubic feet of natural gas and 14,000 barrels of condensate per day. Chevron said that production from the HPHT Alder Field is expected to ramp up over the coming months.

“First gas at Alder represents a significant milestone for Chevron and highlights our commitment to investing and developing resources in the U.K.,” said Greta Lydecker, managing director, Chevron Upstream Europe.

“The safe and successful completion of this project was underpinned by strong collaboration between Chevron and Alder co-venturer ConocoPhillips. Alder supports our goal of helping maximize the economic recovery of the U.K., adds significant production to our portfolio, and helps extend the field life of Britannia, an important asset to Chevron in the North Sea.”

Andy Samuel, chief executive at The Oil and Gas Authority (OGA), said: “We are very pleased to see the safe flow of first gas from the Alder Field. Chevron’s application of innovative subsea technologies and use of the U.K.’s experienced supply chain is closely aligned to the Maximising Economic Recovery Strategy, adding reserves and extending the life of an existing asset.”

According to the company, more than 70 percent of the Alder development work was executed by U.K. based companies, providing significant investment to the U.K. supply chain. Chevron noted that the contracts supported several hundred jobs across a range of U.K. locations including Aberdeen, Invergordon, Leeds, and Newcastle.

Discovered in 1975, the development has been enabled through the application of subsea technologies designed to meet the temperature and pressure challenges of Alder. Key technologies have included a number of firsts for Chevron in the North Sea, including a vertical mono-bore subsea tree system; a subsea high integrity pressure protection system (HIPPS); and a specially designed corrosion monitoring system to measure the real-time condition of the production pipeline.

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