Laggan-Tormore Pipeline Management System
- Rachael Ferguson (Total E&P UK) | Oliver Bradshaw (Total E&P UK) | Blair McMaster (Total E&P UK) | Andrea Musi (Total E&P UK) | Simon Hare (Total E&P UK)
- Document ID
- Society of Petroleum Engineers
- SPE Offshore Europe Conference & Exhibition, 5-8 September, Aberdeen, United Kingdom
- Publication Date
- Document Type
- Conference Paper
- 2017. Society of Petroleum Engineers
- 4.1 Processing Systems and Design, 4.3 Flow Assurance, 5.2 Reservoir Fluid Dynamics, 4.2 Pipelines, Flowlines and Risers, 4.1.1 Process Simulation, 5.3.2 Multiphase Flow, 4.2 Pipelines, Flowlines and Risers, 4 Facilities Design, Construction and Operation
- LedaFlow, Multiphase Flow Simulator, Pipeline Management System, West of Shetland, Laggan Tormore
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The Laggan & Tormore gas fields are situated some 125km north west of the Shetland Islands on the UK Continental Shelf, in approximately 600 metres water depth. The reservoir fluids are delivered directly from the subsea wells to the Shetland Gas Plant (SGP) through twin 18" diameter 143km flowlines.
During the project phase of this development it became apparent that the site and support teams would require a method of monitoring and predicting flow assurance issues such as hydrate inhibition, slugging and liquid holdup, as well as optimising complex operations such as pigging and flowline depressurisation/repressurisation. The solution was the Pipeline Management System (PMS), a tool designed to predict the behaviour of fluids in the two 143km multiphase pipelines between the subsea systems and the arrival facilities at the SGP. The PMS combines LedaFlow, a dynamic multiphase flow simulator, with K-Spice, a dynamic process simulator. The Laggan-Tormore PMS was the first use of LedaFlow in an integrated simulator.
The LedaFlow technology was developed by Total, ConocoPhillips and SINTEF over the last 15 years with Kongsberg joining the project in 2008 as a commercialisation partner. The model derives the multiphase hydrodynamic behaviour of oil, gas and water along a pipeline and approximates the behaviour in the radial directions via results from laboratory experiments and in depth knowledge of the physics of flow in a circular pipe.
The PMS was developed by Kongsberg in conjunction with the Total E&P UK field operations team. It consists of an online, open-loop simulator, which allows the operations team to make decisions based on real time information of fluid behaviour in the flowlines, and an offline simulator, which allows what-if analyses to be carried out. The PMS has been in operation since Laggan-Tormore start up in February 2016.
This paper will provide further details on the use of the LedaFlow technology and the operational aspects of the Laggan-Tormore PMS, giving an overview of the following: –
The utilisation of the LedaFlow technology;–
The various applications of both the online and offline modes of operation of the PMS and;–
The benefits and challenges associated with the use of the PMS during its first year of operation.
|File Size||1 MB||Number of Pages||11|
LedaFlow. [Online] 2017. [Cited: May 23, 2017.] http://www.ledaflow.com/.
Technologies, Kongsberg Oil and Gas. LedaFlow Software. Kongsberg.[Online] [Cited: May 23, 2017.] https://kongsberg.com/en/kongsberg-digital/oil%20and%20gas/flow%20assurance/ledaflow%20software%20-page/.