The Shareholders' Newsletter #76 Spring 2025

At the heart of our businesses

At the heart of our businesses

© SORDOILLET Patrick - CAPA Pictures - TotalEnergies

Angola, Block 17

Talking to

Tolulope John Head of Electrical Service

© TotalEnergies

The image shows a maritime map illustrating several offshore oil installations along the coast. CLOV Independent offshore installation. GIRASSOL Connected to DALIA by an existing 33 kV cable over 13 km. DALIA Linked to GIRASSOL by the 33 kV cable. PAZFLOR Located northeast of the group of installations. Electrical infrastructure Existing cable: 33 kV, 13 km in length between Dalia and Girassol. Visible onshore connection: the N’Zeto substation is shown on the coast.

Objective: Reduce the use of fuel gas and related CO2 emissions for power generation on the FPSOs

Alongside the Carbon Footprint Reduction team

Issue:

To supply electricity to the FPSOs’ equipment (pumps and compressors, etc.), several gas turbogenerators operate at the same time, sometimes outside the machine’s optimal performance range.

Main tasks:

  • Reduce the energy use of equipment powered by the turbogenerators, through energy efficiency initiatives (LED lighting, improved air filters on the turbines, etc.)
  • Maximize the reliability of the turbogenerators and anticipate breakdowns
  • Optimize the number of turbogenerators in operation to minimize the spinning reserve, by:
    • > improving power sharing between the Girassol and Dalia FPSOs by optimizing the high-voltage power cable connecting the two installations
    • > adjusting the management of load sharing on Pazflor’s turbogenerators to increase the power on those in operation
  • Update the current load shedding procedures on both power generation nodes
  • Develop AI-assisted dynamic load shedding to improve efficiency

Result:

At end-2024, the implementation of these measures had already reduced CO2 emissions by 29,000 tonnes, with a potential reduction of 51,000 tonnes over one year, without any investment effort, and with a reduction in maintenance costs of around $13 million over the next 20 years

The role of the Carbon Footprint Reduction unit:

  • Implementing an emission reduction program, in line with the Company’s ambitions and targets, by prioritizing the most profitable projects
  • Supporting the affiliates and helping them to cut their emissions, based on appropriate plans and tools, including for assets operated by third parties
This image illustrates a change in the direction of energy transfer between two offshore installations: Girassol and Dalia. Before: Dalia supplied energy to Girassol. After: Flow reversal — Girassol now supplies energy to Dalia.