A New Flow Assurance Strategy for the Vega Asset: Managing Hydrate and Integrity Risks on a Long Multiphase Flowline of a Norwegian Subsea Asset
- Stephan Hatscher (Wintershall Norge AS) | Luis Ugueto (Wintershall Norge AS)
- Document ID
- Society of Petroleum Engineers
- SPE Offshore Europe Conference and Exhibition, 3-6 September, Aberdeen, UK
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Petroleum Engineers
- subsea tie-back, integrity management, flow assurance, hydrate management
- 25 in the last 30 days
- 96 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 9.50|
|SPE Non-Member Price:||USD 28.00|
The Vega subsea field in Norway has been producing successfully using a continuous Mono Ethylene Glycol (MEG) injection, topped up with corrosion inhibition means. A topside reclamation process allows re-use of MEG, however, limits the possibilities to produce saline water. In order to manage wells producing saline formation water and to increase ultimate recovery, a new flow assurance and integrity philosophy without continuous MEG injection is considered. This paper describes the options on hydrate as well as integrity management and the modifications both on the subsea and topside facilities required to enable an operational philosophy change. This change of the operational philosophy appears feasible, using either timely depressurization or Low Dosage Hydrate Inhibitors (LDHI) as well as a film building corrosion inhibitor in the system.
|File Size||2 MB||Number of Pages||27|
Frostman, L. M., Przybylinski, J.L. 2001. Successful Applications of Anti-Agglomerant Hydrate Inhibitors, SPE International Symposium on Oilfield Chemistry, Houston, Texas, 13-16 February 2001. SPE 65007 MS. 10.2118/65007-MS.
Hatscher, S., Kiselnikov, M., Ugueto, L., Norheim, B., Olsen, V., Malmanger, E., Alvestad, A. 2019. Nine Years Operational Experience of the Vega Field — Design, Experience, and Lessons Learned, SPE Norway One Day Seminar, Bergen, Norway, 14 May 2019. SPE 195613 MS. 10.2118/195613-MS.
Hatscher, S., Kiselnikov, M. 2019. Acid and Scale Inhibitor Squeeze Treatments on two Subsea Gas Condensate Wells: Design of Subsea Connection, Treatment, Wells Start-up and Results of the Operation, SPE International Conference on Oilfield Chemistry, Galveston, Texas, 08-09 April 2019. SPE SPE-193540-MS. 10.2118/193540-MS.
Morales, N.. 2013. A Mature Southern North Sea Asset Considers Conversion to Wet Gas Operation Which Requires the Development of Compatible and Novel Chemistries for Flow-Assurance and Asset Integrity, Offshore Technology Conference, Houston, Texas, 6-9 May 2013. OTC 24092. 10.4043/24092-MS
Tohidi, B., Anderson, R., Mozaffar, H., Tohidi, F. 2015. The Return of Kinetic Hydrate Inhibitors, Energy Fuels 29 (12), 8254-8260. 10.1021/acs.energyfuels.5b01794