ENVIRONMENTAL STATEMENT BARDOLINO DEVELOPMENT

Bardolino Development Environmental Statement
backfill is not sufficient to prevent upheaval buckling, the quantity of rock required should be
less than 10,000 t (Figure 3.7).
Figure 3.7: Open trench and rock dump of the 6” and 3” piggyback pipelines
The operations will be monitored by a post-lay inspection using a Remotely Operated Vehicle
(ROV). The subsequent status of the line, including any free spans, will be monitored in
accordance with the Shell inspection and maintenance plans.
3.5.4 Manifold, production tree and valve skid installation
A new production manifold will be installed close to the Bardolino tree (Figure 3.8) by a single
lift from a DP vessel. The manifold will be approximately 91 t and approximately 9 m x 6 m x
4 m in dimension. The manifold will be fabricated within a piled, slab-sided protection
structure, designed to withstand fishing interaction loads in addition to environmental and
dropped object loads. The manifold protection structure will be secured to the seabed using 4
hammer-driven piles, one at each corner of the structure. The piles will be 610 mm outside
diameter and approximately 20 m long.
A new Vetco standard frame production tree at the Bardolino well will be installed following
the completion of drilling. The tree will be encased in a “cocoon” type protective structure
which is designed to be ‘fishing friendly’ (i.e. if a fishing vessel is arrested the gear can be
retrieved without snagging the tree equipment, thus avoiding damage to the gear or the
seabed asset), and will be constructed from CRA (Figure 3.9).
April 2008 Page 3-19