Decommissioning Insight 2018

DECOMMISSIONING INSIGHT 2018

Netherlands Oil and Gas Exploration and Production Association

NOGEPA

Normally Occurring Radioactive Material

NORM

Normally Unmanned Installation

NUI

OGA

Oil and Gas Authority

Offshore Petroleum Regulator for Environment and Decommissioning OSPAR is the mechanism by which 15 Governments & the EU cooperate to protect the marine environment of the North-East Atlantic. Decision by which derogation could be applied if there is robust reasoning behind leaving specific infrastructure wholly or partially in place Over-trawl surveys make sure the seabed is safe for normal fishing activities to resume. Reverse installation whereby the topsides modules are lifted separately onto a transportation barge or the deck of the crane vessel before being taken onshore. The piece-small method involves dismantling the topside and using onshore demolition techniques to produce small, manageable pieces that can be transported onshore.

OPRED

OSPAR

OSPAR Decision 98/3

Over-trawl surveys

Piece-large

Piece-small

PLANC

Permits, Licences, Authorisations, Notifications and Consents Operational expenditure after production has ceased.

Post-CoP OPEX

Reverse installation

Same as piece-large

SEPA

Scottish Environmental Protection Agency

The single-lift method involves removing the topside in one piece and may involve extra engineering work to reinforce the topside in preparation for removal.

Single-lift

Steel-piled jacket

SPJ

The facilities which sit on top of an installation, typically including drilling, processing and living quarters.

Topsides

Transferrable tax history

TTH

Also referred to as plugging and abandonment (P&A)

Well decommissioning

The WBS shows all elements of a typical decommissioning project and forms the basis for calculating decommissioning expenditure during different stages of the process.

Work Breakdown Structure (WBS)

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