Introduction to Offshore Decommissioning

Brian G. Twomey


This 2-day course is an introduction to the new and growing discipline as well as the complex cross-discipline nature of offshore decommissioning. The training course will show how these practices can be applied in the Asia Pacific region through a mixture of presentations, discussions, videos, animation, and workshop exercises.

What will be discussed:

  • What is decommissioning?
  • History and review of worldwide offshore decommissioning
  • Decommissioning law and regulation and other key drivers in Asia Pacific region
  • Decommissioning liability
  • The decommissioning engineering process and marine operations
  • Decommissioning technology
  • Introduction to well P&A challenges

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Why You Should Attend

Decommissioning is a rapidly developing market sector in the petroleum business, with major potential and major risks. Decommissioning is a source of major liability for countries, operators, contractors, and the public, which must be understood if it is to be managed cost effectively.

Who Should Attend

This introduction level course is for engineering managers, decommissioning engineers, environmental managers, HSE managers, regulators, accountants, governance managers, insurance brokers, lawyers, professionals involved with economic evaluations, forecasting, and economic decisions in the upstream oil and gas business.


  • A processing fee of USD 150.00 will be charged for cancellation received before the early bird registration on 10 May.
  • Cancellation received after the registration deadline, 6 June, a 25% refund will be made to the registrant.
  • No refund on cancellation received seven (7) days, 13 June, prior to the starting of the course date.
  • No refund will be issued if a registrant fails to show up at the training course.


Brian G. Twomey is the managing director of Reverse Engineering Services Ltd, Manchester, UK. He is responsible for decommissioning and abandonment operations planning, decommissioning engineering, peer review work, and cost analysis. He has worked on oil and gas decommissioning and pipeline issues for over 24 years, and has carried out decommissioning studies/work on over 780 offshore, subseas, subsurface, and onshore installations worldwide. In 2012, Dr. Brian G. Twomey co-authored with ASCOPE the “ASCOPE Decommissioning Guidelines”, which will be released this year. Twomey holds a BS in mechanical engineering from Birmingham as well as a dual MS in applied mechanics & composite materials and a PhD in applied mechanics from University of Manchester Institute of Science and Technology (UMIST).