Decommissioning

We aim to manage all projects, products and processes throughout their life cycles in a way that safeguards public safety and health and minimizes environmental impact. In doing so, we strive to find new uses for obsolete or redundant assets.

Ekofisk
The Ekofisk complex is located 200 miles offshore Stavanger, Norway. The Greater Ekofisk Area is comprised of eight fields of varying size and complexity.

ConocoPhillips is working at a steady pace to decommission structures in our Ekofisk field, located in the North Sea. A remaining challenge is to remove the Ekofisk I steel jacket-based platforms and dispose of them onshore in the same environmentally responsible manner as previous removals. The landed structures will be dismantled, sorted and processed in a facility equipped to handle any chemicals and residual oil present prior to recycling. Preparation work for offshore removal is well under way, and the plan in 2009 is to remove approximately 21,000 metric tons from four platforms in the Ekofisk complex and in U.K. waters along the Norpipe oil pipeline. Remaining platforms, which represent approximately 88,000 additional metric tons, will be removed in an annual program through 2013.

Focus also has been given to preparing the Ekofisk tank substructure for in-place disposal in accordance with the Ekofisk I cessation plan. Approximately 1,900 cubic meters of oil and wax were recently removed from the tank storage cells and injected into a disposal well on an adjacent platform. This total represents 99 percent of the measured amount present, compared to a removal target of 90 percent. In addition, measures have been introduced to inhibit formation of hydrogen sulfide over time in the remaining cell water. Final preparations are under way to install a navigation warning system on the tank substructure to protect ship and air traffic.