Jabiru is Australia’s first FPSO development utilising the Jabiru Venture, which has an installed capacity of 55,000 barrels of oil per day. Field production levels were in jeopardy due to leakage of produced fluids from the Jabiru 11 subsea well into the environment. Coogee Resources engaged Nautec to immediately assist the arrest of the leakage and later assist the rejuvenation of this important wells’ commercial production capability.

The Client

Coogee Resources Pty Ltd.

The Scope

Nautec undertook an extensive failure modes and effects analysis and identified possible leak paths through multiple production barriers. The numerous possible complicated internal leak paths demanded a radically different approach in order to develop a robust diagnosis and repair strategy for the well. Nautec’s customised technical resolution involved:

  • Development of all commissioning, first start-up and well clean-up procedures.
  • Develop cause and effects flowchart with various possible leak paths and solutions.
  • Selecting most robust solution, which included deployment of additional 7-5/8″ casing string.
  • Performance of HAZID/HAZOP on preferred solution and decision tree.
  • Performing flow simulation modelling for reinstated completion
  • Specification and equipment procurement and services
  • Workover execution, full reporting, customer debriefing and close out

Nautec developed and finalised a solution capable of handling all probable leak paths, ultimately leading to the commercial recovery of the Jabiru 11 subsea well.

The Value Added

Drawing on Nautec’s unparalleled experience in FPSO field refurbishments and well integrity issues resulted in the recovery of the Jabiru 11 well with minimal losses. Based on flow and process evaluations, Nautec as an independent consultancy was able to secure precise fit-for-purpose subsea completion components from multiple vendors.

Nautec’s close commercial and technical alignment with Coogee Resources resulted in an intimate understanding of the client’s needs and an ability to rapidly respond to changes in operating requirements.