ENVIRONMENTAL STATEMENT BARDOLINO DEVELOPMENT

Bardolino Development Environmental Statement
Regulations, enacts the MARPOL convention. The water will be cleaned to a standard of at
least 15 parts per million (ppm) of oil in water before being discharged overboard. The
volumes of water discharged from this source will be small and are not considered to be of
environmental concern.
Where appropriate, discharges containing chemicals will be subject to a Chemical Risk
Assessment and will require a permit under the Offshore Chemical Regulations 2002.
Sewage and other wastewater from crew accommodation will be discharged into the sea from
the rig via the sewage treatment plant. The quantities of treated sewage will be small in
comparison to the dilution available and they are therefore considered to be of no
environmental concern.
All domestic wastes and general rubbish generated during drilling operations will be
segregated and bagged, or stored in skips on board the drilling unit in accordance with the rig
Waste Management Plan, which is required under the Merchant Shipping (Prevention of
Pollution by Garbage) Regulations 1998. The only exception to this is food waste, which
may be discharged to sea provided maceration processes are used to ensure it is capable of
passing through a 25 mm mesh screen. All other solid wastes will be returned to shore for
disposal as controlled and special waste at licensed waste disposal sites, or for approved
recycling in compliance with company policy and with the requirements of the Environmental
Protection Act 1990 and associated Regulations. Shell procedures document the
segregation and reduction of waste through liaison with suppliers, re-use of packaging and
minimisation of hazardous waste.
3.4.5 Well Design
The well design is currently at a preliminary stage; the data provided is the current base plan
and may be subject to change. Any changes are unlikely to significantly alter the overall
environmental impact since the base case is firm and the timing represents the anticipated
drilling time. The detailed well design will be provided in a PON 15B permit application
submitted to BERR at least 28 days prior to drilling activities.
The Bardolino development well (22/13a – P1) will be drilled as a deviated well. The well
design consists of a 36” top hole section with a 30” conductor. The remaining sections will
require a 20”, 13 5/8“ and 10 3/4” full casing string and 7 5/8” production liner, requiring 26”,
17 ½”, 12 ¼” and 8 ½“ hole sizes to be drilled with a 6 1/8” hole section drilled through the
reservoir (Figure 3.3).
Page 3-8 April 2008