Energy Efficient Processing - SP8

Research Scientist
942 44 119

This subproject develops new technologies (and improves existing ones) for subsea, in-well and topside processing with minimal energy use.

Main objective

The main objective of SP8 is twofold: to demonstrate and optimise the use of new technologies for subsea, in-well and topside processing with minimal energy consumption for new and existing fi eld developments on the NCS; and to support industrial uptake of the innovations. This will be achieved by:

  • Demonstrating energy wastage and identifying the potential for efficiency improvements.
  • Testing new technologies and concepts to accelerate their implementation.
  • Demonstrating "non-intrusive" process optimisation solutions for existing fields.
  • Studying measures necessary to meet challenges arising from future energy supply solutions (examples of such challenges: unsteady energy supply, little excess heat).

Results 2021

MAIN RESULTS IN 2021

  • Generic fi eld scenarios where studied and main energy consumers and losses identified.
  • Optimising topside unit operation and applying energy recovery was demonstrated for a generic case. A theoretical potential of 30% emission reduction was identified.
  • The environmental performance (footprint and emissions) was studied for a Cold-Flow solution as transport and flow assurance concept for future tie-back developments. When compared with traditional alternatives, a lifetime emission reduction of over 20% was achieved.
  • A joint PhD candidate was recruited together with SP7. The candidate will focus on developing an integrated optimisation framework considering both subsurface and topside modelling and the important interactions.

IMPACT AND INNOVATIONS

  • Example studies demonstrating the potential of new technology will accelerate implementation of new solutions: This has been done for the Cold-Flow technology and topside energy recovery devices.
  • A modelling framework for combined subsurface-topside optimisation was extended to correctly cover technical aspects of the processing system. This will lead to more accurate predictions.
Figure 1: Cold-flow concept - Figure 2: Lifetime emissions for different field development options. The Cold-Flow concept reduces lifetime emissions by more than 20% compared to the other options. Results are based on a field case with a 100 km tie-back solution.

Results 2020

  • Created process models for the subsea transport system and topside processing part.
  • Initiated a study mapping energy consumption, losses and dissipation in the production system and analysed the first generic production scenario. Further relevant scenarios will follow. Results will be used to identify measures with high potential for reducing energy consumption and emissions and by this define further work in the SP.
  • A PhD candidate was recruited and started in the position. Title of the project is “Decision support methods to design and operate hydrocarbon production systems considering energy efficiency and environmental performance using numerical modelling and optimisation”.
  • A case study was successfully performed together with SP7. Title: "Dynamic reservoir behaviour and production due to periodic energy supply".

Impact and innovations

  • Guidelines and decision help for new design and improvements of existing production systems.
  • Example studies comparing and showing the potential of new technologies will simplify and accelerate implementation of such solutions.
  • Solutions for overcoming problems related to implementation of renewable energy supply solutions will be investigated
  • Inputs to other SPs (for example covering reservoir & energy system) will be provided by defining boundary conditions and predicting feedback and limitations of the processing system.

Results 2019

This SP develops new, and improves existing technologies for subsea, in well and topside processing with minimal energy use in old and new fields on the Norwegian Continental Shelf and support industrial technology uptake.

Main objective

The main objective of SP8 is to optimize use of and develop new technologies for subsea, in-well and topside processing with minimal energy consumption in brownfields and greenfields on the NCS and supports industrial uptake of the innovations. This will be achieved by:

  • Demonstrating energy wastage and identifying the potential for efficiency improvements
  • Testing new technologies and concepts and by this accelerate implementation of such (green- fields)
  • Demonstrate "non-intrusive" process optimization solutions for existing fields (brownfields)
  • Study measures necessary for overcoming challenges arising from future energy supply solutions (e.g. unsteady energy supply, little excess heat)

Main results

  • The scope of work and working approach for SP8 was defined.
  • Topics to be studied were collected. The topics range from single component/technology level to complete production strategies that might be evaluated.
  • The process simulator K-Spice (by Kongsberg) was taken into use as modelling tool.
  • A PhD candidate was selected and is about to start soon. The PhD will be part of Task 8.1 "Subsea and well technologies" and mainly focus on optimization of production processes. An educational plan was prepared.

Impact and innovations

Expected innovations are:

  • Guidelines and selection help for new design and improvements of existing production systems
  • Example studies comparing and showing the potential of new technologies will simplify and accelerate implementation of such solutions
  • Boundary conditions as input to other process parts (SPs) like reservoir or energy production systems.
  • Solutions for overcoming problems related to implementation of new energy supply solutions