Offshore Natural Gas Pipelines
Enterprise owns or has an interest in approximately 1,544 miles of offshore natural gas pipelines strategically located to serve production areas including some of the most active drilling and development regions in the Gulf of Mexico, including approximately 909 miles of offshore Gulf of Mexico crude oil pipeline systems and six multi-purpose offshore hub platforms located in the Gulf of Mexico with crude oil or natural gas processing capabilities.
Our offshore natural gas pipeline systems provide for the gathering and transportation of natural gas from production developments located in the Gulf of Mexico, primarily offshore Louisiana and Texas. Typically, these systems receive natural gas from production facilities and other pipelines through system interconnects and transport natural gas to various downstream pipelines, including major interstate transportation pipelines that access multiple markets in the eastern half of the United States.
In general, these pipelines generate revenue based on transportation fees charged per unit of volume (typically in MMBtus) transported. These agreements tend to be long-term in nature, often involving life-of-reserve commitments with firm and interruptible fees. Our offshore natural gas pipeline systems do not take title to the natural gas volumes they transport; rather, the shipper retains title and the associated commodity price risk.
Facility |
Ownership Interest |
Miles |
Approximate Net Capacity (MMcf/d) |
Function |
Offshore Natural Gas Pipelines |
||||
High Island Offshore System |
100% |
291 |
1,800 |
FERC-regulated offshore natural gas transmission system that transports production from fields in the Western Gulf of Mexico to numerous downstream pipelines off the coast of Louisiana including ANR and Tennessee Gas Pipeline, UTOS and Stingray. |
Viosca Knoll Gathering System |
100% |
162 |
1,000 |
Natural gas gathering system located off the coast of Louisiana that gathers production into several major interstate pipelines including Tennessee, Columbia Gulf, Southern Natural, Transco and Destin. |
Independence Trail |
100% |
134 |
1,000 |
Offshore natural gas pipeline that transports natural gas from the Enterprise-owned Independence Hub platform in Mississippi Canyon Block 920 to Tennessee Gas Pipeline in the West Delta area of the Gulf of Mexico. |
Green Canyon Laterals |
Various (1) |
94 |
605 |
A group of 28 laterals that are extensions of natural gas pipelines located in the Gulf of Mexico offshore Texas and Louisiana, which deliver to numerous downstream pipelines including the HIOS system. This system has various operators. |
Phoenix Gathering System |
100% |
77 |
450 |
Offshore natural gas pipeline that connects the Red Hawk platform in the Garden Banks area of the Gulf of Mexico to the ANR pipeline system. |
Falcon Natural Gas Pipeline |
100% |
14 |
400 |
Natural gas gathering line located off the Texas coast that delivers gas processed on the Falcon Nest platform into the Central Texas Gathering System. |
Anaconda Gathering System |
100% |
137 |
300 |
Offshore natural gas pipeline that connects the Marco Polo and Typhoon platforms in the Green Canyon area of the Gulf of Mexico to the ANR pipeline system. |
Manta Ray Offshore Gathering System (2) |
25.7% |
250 |
206 |
Unregulated natural gas gathering lines primarily located on the outer continental shelf offshore Louisiana. This system is operated by Shell. |
Nautilus Pipeline System |
25.7% |
101 |
154 |
FERC-regulated natural gas pipeline and related facilities extending from points offshore Louisiana to connecting pipelines near Garden City and Neptune gas processing facilities. This system is operated by Shell. |
VESCO Gathering System(3) |
13.1% |
260 |
105 |
Natural gas gathering line located in south Louisiana. This system is operated by Venice Energy. |
Nemo Pipeline (4) |
33.9% |
24 |
102 |
Offshore Louisiana natural gas gathering pipeline that connects certain Shell offshore platform assets to Manta Ray. This system is operated by Shell. |
(1) Our ownership interest in the Green Canyon Laterals ranges from 2.7% to 100%.
(2) Our ownership interest in these pipelines is held indirectly through our equity method investment in Neptune Pipeline Company LLC.
(3) Our ownership interest in this system is held indirectly through our equity method investment in VESCO.
(4) Our ownership interest in this pipeline is held indirectly through our equity method investment in Nemo Gathering Company.