SPE Global Training Series:
Introduction to Offshore Decommissioning

Management and Information Projects, Facilities and Construction Production and Operations Health, Safety, Environment, and Social Responsibility

Course Description

This course is an introduction to the new and growing discipline of offshore decommissioning. This course introduces the complex cross-discipline nature of offshore decommissioning. The course is a mixture of presentations, discussion, videos, animations, and workshop exercises.


  • What is decommissioning?
  • History and review of worldwide offshore decommissioning
  • Decommissioning law & regulation & other key drivers
  • Decommissioning liability
  • The decommissioning engineering process & marine operations
  • Decommissioning technology
  • Introduction to Well P&A challenges
  • Environmental and safety in decommissioning
  • Transition from production to decommissioning
  • Background to decommissioning cost estimating

Learning Level

Introductory to Intermediate

Taught in English

Course Length

3 Days

Why 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 counties, operators, contractors and the public, which must be understood if it is to be managed cost effectively.

Who Attends

Engineering managers, decommissioning engineers, environmental managers, HSE managers, regulators, accountants, governance managers, insurance brokers, lawyers, and professionals involved with economic evaluations, forecasting and economic decisions in the upstream oil and gas business.


2.4 CEUs (Continuing Education Units) are awarded for this 3-day course.

In-House Training

This course is available for in house training at your office location.

Contact Us
Email inhousetraining@spe.org
Americas +1.972.952.1155
Asia Pacific +60.3.2182.3000
Canada +1.403.930.5454
Middle East and North Africa +971.4.457.5875
United Kingdom +44.20.7299.3300

Cancellation Policy

All cancellations must be received no later than 14 days prior to the course start date. Cancellations made after the 14-day window will not be refunded.  Refunds will not be given due to no show situations.

Training sessions attached to SPE conferences and workshops follow the cancellation policies stated on the event information page.  Please check that page for specific cancellation information.

SPE reserves the right to cancel or re-schedule courses at will.  Notification of changes will be made as quickly as possible; please keep this in mind when arranging travel, as SPE is not responsible for any fees charged for cancelling or changing travel arrangements.

We reserve the right to substitute course instructors as necessary.

Full regional cancellation policies can be found at the Cancellation Policy page within the SPE Training Course Catalog.


Brian Twomey is the managing director of Reverse Engineering Services Ltd, Manchester, UK and 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, subsea, subsurface and onshore installations worldwide. In 2012, Twomey co-authored with ASCOPE the “ASCOPE Decommissioning Guidelines”, which will be released this year.

Twomey holds a BSc in mechanical engineering from Birmingham, and a dual MSc in applied mechanics & composite materials, and a PhD in applied mechanics from University of Manchester Institute of Science and Technology (UMIST).