Using Digital Data to Reduce Subsea Risks

1

Kathy Mercer-White

January 13, 2021

Using Digital Data to Reduce

Subsea Risks

Husky Energy Inc. is a wholly owned subsidiary of Cenovus Energy Inc. 2

The White Rose Field


Background

November 16, 2018 – spill occurred

near the South White Rose Extension

(SWRX) Drill Centre

The source was a separated subsea

flowline connector

Our investigation determined the

primary cause was due to hydrate

development in the flowline connector Separated flowline connector near SWRX


Enhanced Monitoring and Visibility (Steady state example)

Online Subsea Advisor

• Web-based

• Real-time data

• Multiphase OLGA

• Valid: normal and transients

• “Digital Twin” of production system


Leak Detection (Simulation)


Leak Detection Points

Model vs Field


Hydrate Monitoring (Sample)


Model of Flowline

Connector; “Cold Spot”

Hydrate Monitoring

Parameters


Hydrate Monitoring (Sample)


Hydrate Monitoring

Parameters

Model of Flowline

Connector; “Cold Spot”


Enhanced Monitoring and Visibility: Subsea System (Sample)


• Valve status subsea and Topsides

• Rates, pressures, temperatures

along flowpath

• Profile plots

• Circulation operations


Summary

• Digital Twin of the production network; real-time data

• Implemented in 2019; hydrate monitoring added in 2020

• Continuous calculation of hydrate margin for flowline connectors and

other areas of interest

• Technological changes supported by training; emphasizes formality

and questioning attitude

• Enhanced monitoring and decision making ability

Using Digital Data to Reduce Subsea Risks

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