Decommissioning Completions and Assurance System
The completions and data retention system for offshore decommissioning
Plan and run every major part of a decommissioning project, with the approvals and evidence each activity depends on held against it. Oil & gas and offshore wind.
What DeCompletions does
DeCompletions plans and runs every major part of a decommissioning project, for oil & gas and offshore wind — from first consent to the last monitoring return.
Behind each activity it builds a verified audit trail, ready to demonstrate progress to your own management, stakeholders, regulators and contracting partners.
When the project reaches its key interfaces, from disembarkation and lighthouse mode through the start of removals to disposal and recycling, the evidence dossier for each handover pack is already assembled, making each one a simple, managed transition.
One structure for the whole scope
The whole decommissioning scope sits on one work breakdown structure. Permits, licences and consents are held against the activities that need them, and nothing is certified on assertion alone: ITRs verified, punch items accepted, every signature backed by its records.
A verified audit trail
Each activity closes out with verifiable evidence attached, dated and attributed. The trail supports the traceability expected by ISO 9001 quality records, ready to demonstrate progress to management, stakeholders, regulators and contracting partners.
Handover packs at every interface
From disembarkation and lighthouse mode through the start of removals to disposal and recycling, the evidence dossier for each handover pack is assembled as the work happens, making every transfer of custody a simple, managed transition.
Import the schedule. See what has to be approved before work can start.
DeCompletions is a project management tool as well as a record. It takes your project plan and holds every permit, licence and consent against the activities that need it — proposed as standard at setup, adjusted by your team, and kept current as the schedule moves.
- 01
Ingest the plan
Import the schedule straight from your planning tool as a CSV export. Activities match to the work breakdown structure by reference, and anything that does not match is reported back rather than quietly guessed.
- 02
Map the approvals
Every consent sits with the activities that cannot start without it, carrying its own lead time and forecast approval date — so the plan holds its regulatory dependencies, not just its logic.
- 03
Update as the dates move
Re-import after each revision. Changed dates are re-checked against every consent the work depends on, so the effect of a slip appears the day the plan changes rather than the week the work starts.
- 04
Flag the clashes to the people who can act
A consent forecast to arrive after its activity starts shows red; one arriving inside its lead-time buffer shows amber. Alerts reach the consent owner, the activity contact and any watchers — and where a later revision makes an accepted clash worse, it reopens for re-authorisation at the higher level.
Configured to the legislative framework you decommission under
Project setup selects the framework. The work breakdown structure, the consents register and the post-removal monitoring activities are seeded to match — from the first consent through removal, verification and close-out.
United Kingdom
Petroleum Act 1998 section 29 decommissioning programmes, OSPAR 98/3 comparative assessment and derogation, marine licensing, seabed clearance verification and the legacy monitoring conditions that follow close-out.
Norway
Petroleum Act cessation plans and the Ministry of Energy's disposal decision, pollution permits, and the verification and monitoring conditions the disposal decision attaches to removal.
Australia
Section 572 maintain-and-remove obligations, environment plans that define and demonstrate the end state, sea-dumping permits, and the evidence trail that answers trailing liability.
Gulf of America
30 CFR 250 Subpart Q decommissioning, Idle Iron timelines, site-clearance verification, and the post-removal reporting deadlines that follow every well and platform.
Brazil
ANP Resolution 817/2020 deactivation programmes (PDI), Resolution 854/2021 financial guarantees, IBAMA licensing with post-decommissioning monitoring, and Navy NORMAM marking of anything that remains.
Aligned with IOGP decommissioning guidance — the international regulations library (Reports 584/585), comparative assessment (678), financial assurance (812), and the FPSO decommissioning and recycling-facility guidelines.
The obligations outlive the asset. So does the record.
Close-out is not the end. Legacy monitoring conditions, post-disposal reporting and residual liability for anything left in place run for decades — while operating organisations wind down, transfer assets or leave the basin altogether.
DeCompletions retains the verified record — every ITR, certificate, consent, monitoring return and signature — for as long as you contract, independent of your own estate. Ready for the regulator, successor or partner who asks for it years after the teams that built it have moved on.
Retention for as long as contracted
The term is yours to set — renewable, with custody transfer or full export at any point.
Held in the UK/EU jurisdiction
London-region infrastructure, with the evidence itself in EU-jurisdiction object storage.
Verifiable years later
Every entry dated, attributed and backed by its records — the traceability ISO 9001 expects.
Handover of the archive itself
The same transfer-of-custody mechanism that hands over a campaign hands over the record.
Deploying a decommissioning project and need help with your verification?
We work with operators and contractors to set up the completions and verification structure for a programme: the WBS, the consent register, ITRs, punch and certification. Tell us about your project and we'll come back to you.
Talk to usWorking on a programme that uses DeCompletions?
Sign in with your work email — we'll send you a secure link, no password to remember. If you don't have access yet, ask your programme operator to invite you.