ENVIRONMENTAL STATEMENT BARDOLINO DEVELOPMENT

Bardolino Development Environmental Statement
Activity / Source of
Potential Impact
4. Accidental / Emergency Events
4.1 Release of
hydrocarbons during
drilling, installation,
well blow-out, well test
or other well incidents.
Possible Environmental Effects Prevention, Control & Mitigation Measures Significance Rating (refer Table 5.3 for key)
• Creation of an oil sheen or oil slick on the
sea surface around point of release.
Possible subsequent movement and
spreading of oil slick from original site of
release.
• The effects of any accidental spill would
depend on the type of oil spilled, the size
of the spill, the prevailing metocean
conditions, and the actions taken in
response to the spill.
• All offshore operations would be carefully
planned to minimise the likelihood of accidents,
including those that might give rise to oil leaks
and spills.
• There will be specific procedures in place for
bunkering (refuelling) the drilling rig offshore, if
required.
• In the event of an oil spillage to sea, the
Nelson Field Oil Spill Contingency Plan (OSCP)
(including Bardolino) would be activated.
• The integrity of the well would be monitored;
there would be safety valves on production
trees.
• The wells would be controlled in accordance
with principles and procedures laid out in the
current Shell Well Engineering Information
System, in order to ensure that pressures were
contained securely.
• The well/pressure control equipment would be
regularly tested. The drilling rig would be
equipped with a blow-out preventer (BOP), and
the BOP and related equipment would be
pressure tested every 21 days with
intermediate function tests every 8-13 days
• The crew of the drilling rig would be given
environmental awareness training prior to the
start of the drilling programme.
• Specific procedures would be in place to
manage and control bunkering and the transfer
of base oil, in order to minimise the likelihood
of accidental spills.
• Key well site personnel are trained and
certified according (IWCF) international Well
Control forum. Well design has been designed
according Shell EPE technical standards. Risks
for well control are as low as reasonable
practicable.
Moderate – see Section 6
• All offshore operations would be carefully planned to
minimise the likelihood of accidents, including those that
might give rise to oil leaks and spills.
• It is therefore very unlikely that significant amounts of oil
would escape or be spilled at the Bardolino site.
Page 5-16 April 2008