Skip to content
CASE STUDY

Decommissioning in Brazil

Background

Decommissioning marks the final stage of an energy project. In oil and gas, when a field production cycle comes to an end and all the financially viable recoverables have been processed, the facilities and infrastructure must be dismantled. The objective is to leave a clean sea-bed where technically possible, environmentally beneficial, with minimum risk to the safety of personnel involved in the decommissioning operation.

Decommissioning offshore assets often brings complex challenges. Notwithstanding, the inherent risks of removal, our in-house expert teams must consider each asset’s specific marine ecosystems and platform characteristics, including complexity, size and weight. Trident Energy continues to demonstrate its proficiency in decommissioning, setting high standards in terms of efficiency and expertise for the industry in Brazil.

By properly plugging and abandoning legacy wells, we remove outdated infrastructure, mitigate safety and environmental risks and reduce our decommissioning liabilities.

Since late 2022, we have implemented a large-scale three-year decommissioning program of offshore wells that are no longer in use and made considerable progress in executing safe and efficient decommissioning activities.

Outcome

During 2024, a total of 19 wells were successfully decommissioned in a sequential, cost-effective, and efficient approach, with zero safety incidents since the program began. Highlights of the year include decommissioning the second Christmas tree which was installed in Brazil in 1980 (EN-6-RJS); Completing the first tethering operation in Brazil at water depths of 200m and the first open water production string removal.

In total, 41 wells have been plugged and abandoned so far, and we are on track to complete 49 wells and 3 Return to Production (RTP) by the end of 2025.

Quick facts:

  • Plugged and abandoned wells for a 40% lower average cost per well in compared to the wider industry;
  • Diesel consumption of the vessel is 60% lower than a rig provider;
  • Water depths range from 100m to 722m;
  • Quickest time to P&A was 7 days. Industry average is 32 days;
  • Removed over 231 tons of subsea infrastructure from 8 Christmas Trees and more than 5 km of production tubing recovered from the wells.

This website uses cookies

This website uses cookies to improve your experience. By using Trident Energy, you accept our use of cookies.