Library / Midstream and Downstream Decommissioning and Abandonment Regulations 2023
Midstream and Downstream Decommissioning and Abandonment Regulations 2023

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maintenance and safety, where any installation, structure or pipeline remained
disused and in position or are to be partly removed.
(4) In respect of the decommissioning and abandonment of any
installations, structures, utilities, processing plants, pipelines, or other facilities
or infrastructure relating to a licence for midstream petroleum operations
offshore, the licensee shall make an application to the Authority for approval
to decommission and abandon, 24 months prior to the proposed start date of
the Programme.
(5)  An application under subregulation (4), shall be accompanied by a
Programme in a Form prescribed by the Authority in addition to the requirement
in regulation 9 which shall comprise of —
(a) description of items to be decommissioned and abandoned, inclusive
of diagrams, covering —
(i) support structure for offshore fixed and floating installations at the
time of removal (type, size, arrangement and weights),
(ii) topsides for offshore fixed and floating installations (type, size,
configuration, equipment and weights),
(iii) for pipelines, flow lines and umbilicals – lengths, diameters, type
of construction, the extent of burial, trenching and details of any concrete
mattresses, frond mattresses, grout bags, rock-dump or other materials
used to cover the lines,
(iv) details of subsea facilities that form part of the pipelines, such as
production line end manifold, umbilical termination assembly, riser anchor
bases as it relates to midstream and downstream operations,
(v) information about the stability of the pipelines including details of
any spanning or exposure (met-ocean data, survey data and history to
support information given in this section should be included as an annex
to the programme, live pipeline survey information may be relevant), and
(vi) details of interaction between any part of the pipelines and
other uses of the sea (in particular fishing activity, marine traffic,
marker buoy positioning both historical and where relevant to estimate
future activity) ; and
(b) where there is a related equipment that is not covered by the
Programme, details shall be provided for such equipment and explanation
provided of why it is not part of the Programme ;
(c) proposals for identification and removal of seabed debris following
decommissioning and abandonment works ;
(d) for the removal and disposal methods, details of any materials and
remains on the seabed after decommissioning and abandonment ;