Understanding Well Load-up Behaviour in CO2 Wells During CO2 Back-production Field Test at the Ketzin Pilot Site, Germany – Turner Criterion Revisited. (July 2017)

• Record Type: Journal Article
• Authors: Liebscher, Axel; Wiese, Bernd; Möller, Fabian; Bannach, Andreas
• Is Part Of: Energy procedia. Volume 114(2017)
• Page Start: 4188
• Page End: 4192
• Publication Date: 2017-07
• Subjects: Ketzin pilot site -- CO2 backproduction -- Turner criterion -- CO2 wells; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.03.1559
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: A CO2 back-production test was performed at the pilot site for geological CO2 storage at Ketzin, Germany. Over thirteen days 240 tons of CO2 were safely back-produced from the reservoir; 55 m 3 of saline reservoir fluid was continuously co-produced. Throughout different rate stages of the back-production experiment downhole pressure conditions were very stable and the gas/fluid ratio remained constant, indicating that no well load-up occurred. The calculated minimum flow velocities based on the standard Turner criterion are, however, up to one order of magnitude higher than the actual flow velocities. Thus, a modified Turner parameterization is required for CO2 -dominated well.