Allegheny
Online
Operator:
ENI
Image Source: ENI as cited in [https://www.offshore-energy.biz/danos-lands-long-term-gig-for-enis-gulf-of-mexico-assets/] (All rights belong to the original owner.)
Type:
Oil & Gas
Design:
TLP
Installed:
1999
Facility:
Production
Water Depth:
1,004
meters
Country:
USA - Houma District
Block:
GREEN CANYON 60. Block 254
Intro
Allegheny is a deepwater subsea development in the Gulf of Mexico producing oil and gas through a tie-back to an existing floating production system. It began production in the 2010s and serves as a satellite field, relying on host infrastructure for processing, compression, and export rather than operating as an independent installation.
Field
The Allegheny field is located in the Gulf of Mexico, within a deepwater turbidite system. Reservoirs are primarily Miocene sandstones deposited in submarine fan environments. The field is modest in scale and developed via subsea wells tied back to nearby infrastructure to optimize economics and utilize existing processing capacity.
Facilities
The Allegheny development comprises multiple subsea wells tied into a subsea manifold system. Production flows through insulated flowlines to a host floating production platform where separation and processing occur. The host facility handles oil-water separation, gas compression, and water treatment. Oil is exported via regional pipeline networks, while gas is either exported or reinjected for pressure support. Subsea infrastructure includes umbilicals for control, chemical injection systems for flow assurance, and subsea trees with choke and control systems. The system is designed for remote operation, with no permanent surface facility at the field location. Flow assurance strategies include thermal insulation and continuous chemical injection to prevent hydrate formation.
Similar Platforms
Image Source: Igor Prislin, "Use of Field Monitored Data for Improvement of Existing and Future Offshore Facilities",[https://www.researchgate.net/]. (All rights belong to the original owner.)
SUBMIT YOUR STORIES AND PHOTOS
RigOil is built on the stories of the people who lived and worked offshore. If you have photos or memories from life on a North Sea platform, we’d love to include them in the archive.
Upload your photos and help preserve this shared history.*
*By submitting content, you confirm you have the right to share it and grant RigOil a non-exclusive, royalty-free licence to use the material for editorial, promotional, and commercial purposes. Copyright remains with the contributor.