Field · the network on the US Outer Continental Shelf
EI280
EI280 is a field on the US Outer Continental Shelf. The map shows the owners.
The network
From owner to landfall. Links without their own label have their source in the column heading; curated and derived links are labelled at the link.
- The colour shows the content:
- Gas
- Oil
- Condensate
- CO₂
- Oil and condensate
- The line shows the source:
- pipeline in BOEM/BSEE data
- curated, with the source at the link
- possible onward route, not measured flow
- planned or not in service
The links show direction, not volume.
G23876
- Marlin Energy Offshore, L.L.C. operator69%from 1 Oct 2011
- Apache Corporation18.75%from 30 Apr 2011
- Castex Offshore, LLC6.25%from 30 Apr 2011
- PALACE EXPLORATION COMPANY6%from 21 Apr 2009
A share in a lease is not a field share.
BOEM · 4 Oct 2026- The fieldEI280Facilities and pipelines
No facilities in service at BOEM/BSEE
LandfallThe source does not show where the production comes ashore.
Leases
The leases the field lies in, with the licensees as the source states them. A share in a lease is not a field share.
LeasesBOEM · 4 Oct 2026
| Name | Type | Operator | Licensees |
|---|---|---|---|
| G23876 | lease | Marlin Energy Offshore, L.L.C. | Marlin Energy Offshore, L.L.C. 69%, Apache Corporation 18.75%, Castex Offshore, LLC 6.25%, PALACE EXPLORATION COMPANY 6% |
Notes
- The shares are per lease in the source. A lease share is not a field share, and it is not combined with the field's production.
- BOEM's shares are record title shares per lease. They are not the participation shares in the unit agreements, which are not public, and not necessarily the working interests (operating rights). The fields therefore have no ownership shares; the shares are per lease, and production by share is calculated per lease.
- The ownership history is BOEM's own: each assignment has an effective date, and a share applies from that date until the day before the next change. Shares that ended before 2020 are not included.
- The leases in the Gulf of Mexico are included when they belong to a field in BOEM's field list or have production in Jun 2025–Jun 2026. 1176 leases with current owners, most of them in the exploration term, are not included in the overview.
- BOEM has no field outlines. The field's position is the centre of the blocks BOEM links to the field (Gulf of Mexico) or of the leases the field produces from (Pacific).
- The fields are named as in BOEM's list of nicknames. Fields without a nickname are shown with BOEM's field code (for example MC392), and in the Pacific BOEM gives only the field code (HONDO, DSCDRS).
- The share estimate per field is OESA's calculation: the record title share in each lease in the field, weighted by the lease's production from the field in oil equivalent (Jul 2025–Jun 2026), with the share that applied in each month. It is not the field's ownership and is not used in sums; the sums are calculated per lease.
Sources
All figures and links on the page come from these sources. The licence and attribution are as each source requires. Conversions and calculations are OESA's own and labelled with the method.
- BOEM – field names and leases (Field Names Master List, Appendix A) BOEM / BSEE · 7 Oct 2026Licence: U.S. Government Work, public domain (17 U.S.C. § 105)Attribution: Source: BOEM/BSEE Data Center
- BOEM – lease owners with designated operator (Gulf, Pacific, Alaska) BOEM / BSEE · 4 Oct 2026Licence: U.S. Government Work, public domain (17 U.S.C. § 105)Attribution: Source: BOEM/BSEE Data Center
Not in the data: Flow in each pipeline, where the gas ends up, and the buyers of oil and gas.