Session: 04-03-04 Thermo-Mechanical

Paper Number: 104729

104729 - Demonstrating Electrically Heat Traced Flowline Performance – As-Built Engineering Model vs. Field Data, the Perfect Matching 

As part of the AkerBP Skarv field development, the Ærfugl phase 2 project is a circa 13km tie-back requiring an electrically heated flowline (EHTF^®) to provide a reliable and cost-effective hydrate management solution.  

This paper will present at first the reverse engineering work done on the thermal and electrical performances of this first generation of EHTF^® system based on field data. In production since November 2021, operational feedbacks on the highly insulated Pipe-in-Pipe associated to the distributed temperature monitoring system have been used to confirm the passive thermal performance of the system as targeted and predicted by design. In addition, data gathered during the performance tests performed in May 2022 as part of a planned production shutdown have been processed; the results clearly demonstrating the perfect match between predicted system performances using Subsea7 design and engineering models and recorded topside electrical parameters and subsea heating performances.    

Then, based on those robust engineering models, typical EHTF^® performances will be presented to provide more insights on achievable EHTF^® system capabilities.  

This is indeed a key achievement demonstrating the maturity of the technology and providing to operators an increased level of confidence in the EHTF^® technology and in Subsea7’s design, fabrication, and installation abilities to deliver EHTF^® solutions on future field developments as specified and planned.  

To conclude, the paper will present the next generation of EHTF^®, achieving longer tie-back distance while capitalizing on the first-generation knowledge and technology. 

Presenting Author: Guy Mencarelli Subsea 7

Presenting Author Biography: Guy Mencarelli has 20 years of experience in the Oil & Gas industry, working mostly in the subsea pipeline engineering.
Since 2018 he has been deeply involved in the qualification of the Subsea 7's and ITP Interpipe EHTF technology qualification by managing the technical development and delivering the associated engineering on the Ærfugl project. Since 2019 he's the thermal management pipeline product engineering manager ensuring the technical follow-up of all passive and active heating pipeline systems.

Authors:

Guy Mencarelli Subsea 7
Yves Minier Subsea 7
Donald Silcock Subsea 7
Camille Pradeilles Subsea 7
Xavier Michel Subsea 7
David Gibson AkerBP