What is decommissioning in the oil and gas industry?
Decommissioning is the cessation of offshore oil and gas operations at an offshore platform and returning the seafloor to its pre-production state.
What happens to an offshore rig after it is decommissioned?
When oil companies cease drilling in these states, they decommission their platform by sealing the oil well. Then they can either choose to remove the entire platform or convert it into a reef by removing just the upper section of the structure.
How do you decommission a system?
I’ll go through some of the steps to ensure a smooth decommissioning process.
- Verify the resource’s function. Once you get a decommissioning request from stakeholders, verify that the resource actually is unused.
- Make a backup and rollback plan.
- Schedule decommissioning.
- Decommission the resource.
What is decommissioning and abandonment?
INTRODUCTION. At the end of the production life, the project will be decommissioned and abandoned to restore the site to a safe condition that minimises potential residual environmental impact and permits reinstatement of activities such as fishing and unimpeded navigation at the site.
How do you decommission an oil rig?
Decommissioning an offshore platform generally entails: Plugging all wells supported by the platform and severing the well casings 15 feet below the mudline; Cleaning and removing all production and pipeline risers supported by the platform; Removing the platform from its foundation by severing all bottom-founded …
What is the largest offshore oil rig in the world?
Berkut oil rig Berkut is the biggest oil and gas platform in the world situated near the Russian coastline facing the Pacific Ocean, near the island of Sakhalin close to the Japanese mainland. It is truly an engineering marvel, weighing about 200,000 tonnes and 35 m deep from the seafloor.
How many oil rigs are off the coast of California?
Offshore Oil & Gas Platforms and Islands There are four offshore oil platforms in state waters off the coast of California.
What is a decommissioning plan?
Decommissioning Plan means a plan to retire the physical facilities of the Project, including decontamination, dismantlement, rehabilitation, landscaping and monitoring.
What is the difference between retirement and decommissioning?
Application retirement, also called application decommissioning and application sunsetting, is the practice of shutting down redundant or obsolete business applications while retaining access to the historical data.
What is decommissioning in project cycle?
Decommissioning is the process of shutting down a building and/or removing it from operation or use. Decommissioning may be followed by re-commissioning, repurposing or demolition.
Why do we decommission?
Decommissioning thus enables the safe reuse of the site, as well as any buildings or parts of the facility for other nuclear, industrial or general purposes.
What is a decommissioning job?
Working a nuclear decommissioning job means you help handle the responsibilities surrounding the closing and termination of a nuclear power plant. You can be a decommissioning program manager where you manage, coordinate, and direct the overall process to dismantle a reactor and plant.
How do you decommission a pipeline?
Pipeline decommissioning refers to a series of properly planned and executed actions required to safely remove a pipeline or network of pipelines from activity. Commonly employed methods of decommissioning include pipeline nitrogen purging, pipeline pigging, filling, and plugging.
What company owns the most oil rigs?
The world’s biggest offshore drilling companies
- Schlumberger – $32.8bn.
- Halliburton – $23.99bn.
- Baker Hughes – $22.9bn.
- Petrofac – $5.83bn.
- Weatherford – $5.74bn.
- China Oilfield Services Limited (COSL) – $3.17bn.
- Nabors Offshore – $3.05bn.
- Transocean – $3.01bn.
What is offshore decommissioning?
Decommissioning is the process of ending offshore oil and gas operations at an offshore platform and returning the ocean and seafloor to its pre-lease condition.