Process control upgrade boosts system flexibility

Comprehensive modernization of process control systems at gas storage facilities can increase gas-transfer flexibility and shorten response times, even with existing field equipment. Wingas undertook such upgrades on the largest underground gas storage site in Europe: Rehden in Lower Saxony, Germany (Fig. 1).With only 16 wells for its 7 billion cu m capacity, Rehden uses horizontally drilled wells tied back to this central location for injection and offtake (Fig. 1).BackgroundUntil recently storage facilities acted purely as a compensating buffer between producer and consumer, making up for seasonal fluctuations in demand for natural gas. During cold months of the year, European demand ca...

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