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Last modified: 22 May 2019 17:07

Course Overview

Decommissioning of oil and gas infrastructure is becoming a major issue for the North Sea and other mature basins.  This course provides students with an overview of the stages of shutting down the production process and cleaning of the system and then the possible methods of removal of the structure.

Course Details

Study Type Postgraduate Level 5
Session Second Sub Session Credit Points 15 credits (7.5 ECTS credits)
Campus Online Sustained Study No
  • Dr Richard Neilson

What courses & programmes must have been taken before this course?

  • Any Postgraduate Programme (Studied)

What other courses must be taken with this course?


What courses cannot be taken with this course?


Are there a limited number of places available?


Course Description

This course presents the issues associated with decommissioning, dismantling and disposal of offshore structures and also process shut down and chemical disposal.  The decommissioning of upstream Oil & Gas processes is a staged process, with turndown and minimum operation options thoroughly explored before cessation of production. Once production is ceased, the isolation and cleaning of the plant and pipework can begin and brings its own challenges. The key aspects of process engineering for decommissioning are explored in this course.  Then comparison between abandonment (including so-called rigs to reefs) and offsite disposal is made.  An overview is presented of cutting, lifting and transportation technologies, for either piece small dismantling, heavy lift or single lift removal.  The issue of derogation for footings, and the particular difficulties of Gravity Base Structures, are explained.  The reuse and disposal of materials/equipment onshore is covered.

Contact Teaching Time

Information on contact teaching time is available from the course guide.

Teaching Breakdown

More Information about Week Numbers

Details, including assessments, may be subject to change until 31 August 2023 for 1st half-session courses and 22 December 2023 for 2nd half-session courses.

Summative Assessments

1 piece of Continuous Assessment (20%); Examination (3 hours) (80%).

The re-sit will comprise of re-doing the failed element/s (exam and/or coursework assessment/s) from the 1st attempt with a maximum CGS mark of D3. The marks for other elements (successfully passed) will be carried over. Resit mark of either RP or RF will be recorded.

Formative Assessment

There are no assessments for this course.


Written feedback will provided on all coursework.  Feedback will be made available upon the examination on request.

Course Learning Outcomes


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