Critical issues:

• The risks associated with blowouts are often an important factor in choosing one dry tree tieback well system over another
• Dry tree well systems become more vulnerable to loss of well control with increased water depth (greater riser length and higher stresses). Larger and more expensive platforms are required to support the larger risers
• The costs to repair well system component failures and the value of reduced revenues escalate dramatically in deeper water
  

Solutions:

• DNV Consulting developed a new method and tool to quantify capital costs, operating costs, blowout risk costs and unreliability costs associated with deepwater well systems
• The method has been used by most of the oil majors to select an optimal completion system for field developments in the Gulf of Mexico, West of Africa and Offshore Brazil

Value delivered:

• Our method was used to assess the advantages and disadvantages of the competing concepts