OSIGp Geo-Insights & Field Experiences on Offshore Subsea Decommissioning


Tue Oct 25 2022 at 05:30 pm to 08:00 pm


The Melbourne Hotel | Perth, WA

OSIGp invite you to their Geo-Insights & Field Experiences on Offshore Subsea Decommissioning Event
About this Event

The evening will focus on the following three topics:

1. External dredging of jacket platforms in preparation for decommissioning

Speaker: Ercan Kökden, Senior Geotechnical Engineer / Field Engineer, Allseas

During the recent decommissioning of jacket platform structures in the North Sea, Allseas designed and operated its own pile dredging spread. This presentation presents challenges and outcomes encountered during the development and first commercial use of the pile dredging spread.

2. Subsurface Information for Well Abandonment

Speaker: Sheila Mackay, Principal Geophysicist (Geohazards) | GeoScience, Woodside

Once a well has fulfilled its purpose, be that exploration, appraisal or development it needs to be permanently abandoned. Barriers are designed such that individual pressure compartments in the subsurface are isolated from each other and seabed. The subsurface information required to identify the pressure compartments requires numerous datasets and a multi-disciplined team. This talk discusses the workflow implemented by subsurface specialists at Woodside Energy when planning the permanent abandonment of wells.

3. Some Geotechnical Considerations for Decommissioning Offshore Infrastructure

Speaker: Prof. Susan Gourvenec, Professor of Offshore Geotechnical Engineering, University of Southampton

This presentation will explore some geotechnical considerations for decommissioning offshore infrastructure considering both retrieval and in situ decommissioning. Research outcomes of the changing properties of the seabed over the life of the structure, and the impact on recovery loads or the in-place stability of infrastructure that is decommissioned in situ will be presented.


  • Registrations: 5.30 pm;
  • Presentations: 6.00 pm – 7.00 pm;
  • Networking session including drinks and finger food: 7.00 pm – 8.00 pm

For more information, visit our website here (Please note the programme is subject to change).

Event Photos

*Registrations are editable online via your eventbrite registration link until 2pm on the day. 

For further enquiries, please contact OSIGp directly by emailing:

Manuel Herduin : [email protected]


Terms & Conditions for this event:

To confirm your place at the above event, you must register and pay online prior to the event.  Please note, online registration closes at 2pm on the day (unless sold out prior).

Payment during the registration process (via credit card or invoice) is required in order to secure your place/s. If using credit card it will be deducted at the time of registration and an email confirmation and email receipt/tax invoice from Eventbrite will be forwarded to the stipulated email address. If invoice requested, it will be sent to your email address at time of registration and payment will be required within 14 days from receipt of invoice. If payment is not received within this time your registration may be cancelled.

Registrations are fully refundable up until  30 days prior to the event. 

To confirm if your organisation is a Corporate Member please check the event flyer or visit https://www.sut.org/branch/australia-perth/membership/corporate-members/

1.5 CPD hours can be claimed for this event. Please keep the flyer and receipt for auditing purposes.

Should you have any questions please contact SUT on 9481 0999

Many thanks to our event sponsor:

Event Photos

Where is it happening?

The Melbourne Hotel, 33 Milligan Street, Perth, Australia

Event Location & Nearby Stays:

Society for Underwater Technology - Perth Branch

Host or Publisher Society for Underwater Technology - Perth Branch

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