Development Options with SeaStar TLPs

Dry Trees

1800x2300 (2meg)

A SeaStar TLP is ideal for surface trees, because the relative movement between the platform and the production risers is limited to only a few feet, permitting simple, inexpensive, easy-to-maintain riser tensioning systems (see page 9). Production risers pass through a central moonpool and terminate at the tree deck. A SeaStar TLP also can accommodate a combination of subsea wells and surface completions. Production to the surface trees is via top-tensioned risers passing through the TLP's moonpool. If the development includes subsea wells, they are produced through catenary flowline risers.

Wet Trees

1200x1500 (1.5meg)

The first three SeaStar TLPs all receive production from subsea wells, both local and remote satellite. All production to the platforms is via flexible flowlines or steel catenary risers.

TLWP with FPSO

2000x1300 (1.2meg)

In areas of the world where FPSOs currently operate, operators are evaluating a hybrid development architecture that combines a Tension-Leg Wellhead Platform (TLWP) with an FPSO vessel. The TLWP provides drilling and well functions while the adjacent FPSO provides processing, utilities, storage, and offloading functions. The combination of these proven technologies is promising in areas with little or no pipeline infrastructure and for reservoirs requiring considerable drilling, completion, and well-maintenance activity.

Dry Tree SeaStar with Drilling Tender

The capability of a SeaStar dry-tree TLP can be increased by moving selected drilling and completion components to a semisubmersible drilling tender vessel.