In exchange, Anadarko conveyed a 12.75% working interest in the Heidelberg development, dropping its stake to 31.5% and retaining the operatorship.
Under the agreement, the operator could mitigate some of the project risk and limit its exposure to capital burden.
(All images courtesy Anadarko Petroleum Corp.) In addition, this philosophy was said to have enhanced safety as well as scheduling and operational efficiencies and synergies.
Once that had occurred, the project could be entered into its backlog, where detailed hull design and fabrication would be carried out at its Pori, Finland yard. With the project greenlit and financing arranged, the Heidelberg consortium almost immediately began handing out a string of awards for the development.
Among those announced in the following weeks were FMC Technologies Inc., contracted to supply subsea equipment orders, including five enhanced horizontal trees, tree-mounted controls, two manifolds, and other associated tooling and equipment.
In June 2015, the spar hull departed the Ingleside yard to its Green Canyon job site.
The upending of the spar had been announced completed the following month.
Located in 5,300 ft (1,615 m) of water, Heidelberg is estimated to hold 200-400 MMbbl of recoverable resources. Anadarko employed its “Design One, Build Two” strategy on the spar, modeling Heidelberg after Lucius, itself the recipient of an Offshore Top 5 project in 2015.
Development consists of a standalone truss spar with a capacity of more than 80,000 b/d of oil and 2.3 MMcm/d (81 MMcf/d) of natural gas, six production wells, two drill centers (in GC859 and GC903), dual-looped 8-in. The company attributes the development’s accelerated timetable to this strategy.
As it had for Lucius and multiple other spars, Anadarko turned to long-time partner Technip in November 2012 to begin construction and early works on the Heidelberg spar.
The contractor said that the letter of intent it received allowed for actions such as the purchase of long-lead items for the hull and start of fabrication, even in advance of the expected project sanction date in 2013.
Originally carried out onshore, Anadarko first brought the model offshore with Lucius with its 6 million capital-carry arrangement.
Heidelberg was discovered in 2009, one of eight announced by Anadarko that year, in a class that included the prolific Tweneboa discovery.
As with Lucius, only around three years passed from sanctioning Heidelberg to first oil, with the explorer noting that its austere philosophy abbreviated the second spar’s expected development cycle by about 18 months.