Project Profile
Value: $927 Million
Startup Month: January
Startup Year: 2011
Upstream Gas Reserves: 561 billion ft³
Water Depth: 1,000m
Longhorn:
Situated in a water depth of 2,427 feet (740 meters) on Missippi Canyon Block 546 is the Longhorn field. Eni serves as the operator of the field and holds a 75% working interest; Nexen holds the remaining 25% interest.
On March 6, 2009, Eni submitted an IEP proposing to utilize an existing Longhorn subsea infrastructure to carry production from Mississippi Canyon Block 546 from subsea well No. 2 to a host processing facility, the Corral Platform, located on Mississippi Canyon Block 365. Plan Control No. N-9270, a previously approved plan included the installation of two 8-inch bulk gas right-of-way pipelines with an associated umbilical and two 6-inch rigid in-field flowlines with associated jumpers and PLETs.
Eni\'s approved plan consisted of installing a 6-inch bulk gas in field flowline connecting the new subsea well to the subsea manifold in Mississippi Canyon Block 502 where it was connected with other Longhorn production, then transported to the Corral Platform on Block 365 for further processing. The pipeline has a flowrate of 50 MMsf/d and 1,407 bopd.
The Longhorn field commenced production on Oct. 26, 2009.
Appaloosa:
Located in the Gulf of Mexico on Mississippi Canyon Blocks 459, 460, 504 and a portion of 503, the Appaloosa field is situated in a water depth of 2,800 feet (853 meters). Eni, the operator, owns 100% interest.
On Dec. 7, 2005, Eni submitted an IEP to drill, complete and test five exploratory wells on the Appaloosa prospect. In 2007, the Deepwater Millennium drillship drilled two wells, but a discovery was not reported. A year later, the GSF Celtic Sea semisub was contracted and drilled well MC459 #1. The drilling encountered oil hydrocarbons.
Appaloosa Field Development
In December 2008, Appaloosa was approved for field development at a total investment of $228 million. Development includes subsea wells linked to an existing area facility, the Corral platform. The oil treatment capacity of the platform will be expanded, in order to accommodate the production increase from the Appaloosa field.
First oil from Appaloosa commenced in June 2011, and is flowing at a rate of 7,000 boepd.
averaging 4 kbbl/d throughout 2011within the Appaloosa.
Operators:
Eni: Operator and 75% interest in Longhorn and operator and 100% interest in Appaloosa
Nexen: 25% interest in Longhorn
Contractors:
Aker Solutions: Subsea work
Helix Energy: Pipeline
Technip: Appaloosa tieback
UniversalPegasus International: Detailed design for field development