Company · the network on the US Outer Continental Shelf

Kosmos Energy Gulf of Mexico Operations, LLC

Kosmos Energy Gulf of Mexico Operations, LLC holds stakes in 11 fields on the US Outer Continental Shelf and operates 2 of them. The map shows how the fields connect to facilities, pipelines and landfall.

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Calculated equity production, last 12 months (BOEM), 11 of 15 fields and licences with production: 0.74 million Sm³ o.e.; Estimate · Jul 2025–Jun 2026 · BOEM · 7 Oct 2026
Per day (BOEM): 13,000 barrels o.e./day; Estimate · Jul 2025–Jun 2026 · BOEM · 7 Oct 2026
Fields with a stake: 11; BOEM · 4 Oct 2026
Operator of: 2 fields; BOEM · 7 Oct 2026
Oil, operated, last 12 months: 6,338,965 bbl; Jul 2025–Jun 2026 · BOEM · 7 Oct 2026
Gas, operated, last 12 months: 5,206,920 Mcf; Jul 2025–Jun 2026 · BOEM · 7 Oct 2026
Leases with a share or operatorship: 15; BOEM · 4 Oct 2026
Pipelines operated by the company: 1; BOEM · 1 Oct 2026

Estimate: Calculated by OESA, not figures from the company: for each field (or each licence where both the shares and the production are per licence) the share that applied in each month is multiplied by the production from BOEM (Jul 2025–Jun 2026), converted to oil equivalent and summed over 11 fields and licences. Oil equivalent by the Norwegian Offshore Directorate's rule: oil, condensate and NGL in Sm³ count equally, 1,000 Sm³ of gas = 1 Sm³ o.e. and 1 tonne of NGL = 1.9 Sm³ o.e. Converted from barrels: 1 barrel = 0.158987 m³ (42 US gallons). The source's barrels are at 60 °F and Sm³ at 15 °C; the difference is under 0.1%. Converted from Mcf: 1 Mcf (60 °F, 14.73 psia) ≈ 28.33 Sm³ (15 °C, 101.325 kPa). Not included in the sum: 4 fields or licences where the source's shares cannot be used for calculation. G24107: BOEM gives different shares for different parts of the lease (the owner groups). The source does not say which part the production comes from, so the share is not used in calculations. G26664: BOEM gives different shares for different parts of the lease (the owner groups). The source does not say which part the production comes from, so the share is not used in calculations. G36060: BOEM gives several different shares for the company in the same assignment, so the share is ambiguous and is not used in calculations. G36061: BOEM gives several different shares for the company in the same assignment, so the share is ambiguous and is not used in calculations. The figure applies in the United States and is not the company's global production. Per day: Sm³ o.e. × 6.29 barrels per Sm³ divided by the number of days in the period. Rounded to the nearest 10 below 1,000, the nearest 100 below 10,000 and the nearest 1,000 above that.

Attribution: Source: BOEM/BSEE Data Center, OGOR-A; Source: BOEM/BSEE Data Center; Source: BOEM/BSEE Data Center. This data is not for navigational use.

The network

The fields with a stake or operatorship, with facilities, pipelines and landfall. Links without their own label have their source in the column heading.

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.

Kosmos Energy Gulf of Mexico Operations, LLC11 fields with a stake · operator of 2

Field and shareBOEM · 7 Oct 2026

Facilities and pipelinesBOEM · 26 Sep 2026

Landfall

Field and shareEast Anstey 40.5% in lease G21176A share in a lease is not a field share.field 1.32 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
No facilities in service at BOEM/BSEE
Landfall
The source does not show where the production comes ashore.
Field and shareDevils Tower share not statedA share in a lease is not a field share.field 1.19 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
MC 773 A(Devils Tower) 1 facility in service
Landfall
The source does not show where the production comes ashore.
Field and shareMC300 share not statedA share in a lease is not a field share.field 1.06 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
No facilities in service at BOEM/BSEE
Landfall
The source does not show where the production comes ashore.
Field and shareMC214 operator share not statedA share in a lease is not a field share.field 0.90 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
No facilities in service at BOEM/BSEE
Landfall
The source does not show where the production comes ashore.
Field and shareGC944 share not statedA share in a lease is not a field share.field 0.46 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
No facilities in service at BOEM/BSEE
Landfall
The source does not show where the production comes ashore.
Field and shareFourier/Sumter 22.5% in lease G34441A share in a lease is not a field share.field 0.39 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
No facilities in service at BOEM/BSEE
Landfall
The source does not show where the production comes ashore.
Field and sharePompano 30% in lease G08483A share in a lease is not a field share.field 0.32 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
No facilities in service at BOEM/BSEE
Landfall
The source does not show where the production comes ashore.
Field and shareMC431 11.82% in lease G22877A share in a lease is not a field share.field 0.23 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
No facilities in service at BOEM/BSEE
Landfall
The source does not show where the production comes ashore.
Field and shareGladden 20% in lease G18292A share in a lease is not a field share.field 0.12 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
No facilities in service at BOEM/BSEE
Landfall
The source does not show where the production comes ashore.
Field and shareGeauxpher share not statedA share in a lease is not a field share.field 0.015 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
No facilities in service at BOEM/BSEE
Landfall
The source does not show where the production comes ashore.
Field and shareHadrian South operator 33.34% in lease G36694A share in a lease is not a field share.
Facilities and pipelines
No facilities in service at BOEM/BSEE
Landfall
The source does not show where the production comes ashore.

Leases

The leases where Kosmos Energy Gulf of Mexico Operations, LLC holds a share or is the operator. A share in a lease is not a field share.

LeasesBOEM · 4 Oct 2026

Name	Type	Operator	Licensees
G08483Pompano	lease	–	Talos Resources LLC 40%, Kosmos Energy Gulf of Mexico Operations, LLC 30%, ILX Prospect Rampart, LLC 15%, Ridgewood Rampart, LLC 15%
G18292Gladden	lease	W & T Offshore, Inc.	W & T Offshore, Inc. 57.5%, Kosmos Energy Gulf of Mexico Operations, LLC 20%, Arena Exploration LLC 12.5%, CL&F Resources LP 10%
G21176East Anstey	lease	–	Kosmos Energy Gulf of Mexico Operations, LLC 40.5%, Ridgewood South Santa Cruz, LLC 20.25%, Talos Exploration LLC 20.25%, Red Willow Offshore, LLC 14%, Houston Energy Deepwater Ventures XVI, LLC 2.5%, HEDV South Santa Cruz, LLC 2.5%
G22868MC300	lease	–	Murphy Exploration & Production Company - USA 24.39%, Red Willow Offshore, LLC 20.25%, Kosmos Energy Gulf of Mexico Operations, LLC 11.40%, Talos Exploration LLC 11.40%, Ridgewood Institutional V Prospective Leases, LLC 10.13%, LLOG Bluewater Exploration Company, L.L.C. 7.31%, Ridgewood Energy Bluewater Oil Fund II, LLC 4.64%, Houston Energy Deepwater Ventures III, LLC 3.73%, Ridgewood Energy Gulf of Mexico Oil and Gas Fund, L.P. 1.69%, Ridgewood Energy O Fund, LLC 0.84%, Ridgewood Energy U Fund, LLC 0.84%, Ridgewood Energy X Fund, LLC 0.84%, Ridgewood Energy Y Fund, LLC 0.84%, Ridgewood Energy Z Fund, LLC 0.84%, Ridgewood Energy B-1 Fund, LLC 0.84%
G22877MC431	lease	–	Murphy Exploration & Production Company - USA 26.84%, Red Willow Offshore, LLC 20.25%, Kosmos Energy Gulf of Mexico Operations, LLC 11.82%, Talos Exploration LLC 11.82%, Ridgewood Institutional V Prospective Leases, LLC 10.13%, HEDV Gala, LLC 7.31%, Ridgewood Energy Bluewater Oil Fund II, LLC 4.82%, Ridgewood Energy Gulf of Mexico Oil and Gas Fund, L.P. 1.75%, Ridgewood Energy O Fund, LLC 0.88%, Ridgewood Energy U Fund, LLC 0.88%, Ridgewood Energy X Fund, LLC 0.88%, Ridgewood Energy Y Fund, LLC 0.88%, Ridgewood Energy Z Fund, LLC 0.88%, Ridgewood Energy B-1 Fund, LLC 0.88%
G24059MC214	lease	Kosmos Energy Gulf of Mexico Operations, LLC	Kosmos Energy Gulf of Mexico Operations, LLC 61.06%, Ridgewood Odd Job, LLC 19.47%, Talos Exploration LLC 19.47%
G24060MC214	lease	Kosmos Energy Gulf of Mexico Operations, LLC	Kosmos Energy Gulf of Mexico Operations, LLC 54.88%, Ridgewood Odd Job, LLC 17.5%, Talos Exploration LLC 17.5%, Ridgewood Institutional V Prospective Leases, LLC 10.13%
G24064MC300	lease	–	Murphy Exploration & Production Company - USA 24.39%, Red Willow Offshore, LLC 20.25%, Kosmos Energy Gulf of Mexico Operations, LLC 11.40%, Talos Exploration LLC 11.40%, Ridgewood Institutional V Prospective Leases, LLC 10.13%, LLOG Bluewater Exploration Company, L.L.C. 7.31%, Ridgewood Energy Bluewater Oil Fund II, LLC 4.64%, Houston Energy Deepwater Ventures III, LLC 3.73%, Ridgewood Energy Gulf of Mexico Oil and Gas Fund, L.P. 1.69%, Ridgewood Energy O Fund, LLC 0.84%, Ridgewood Energy U Fund, LLC 0.84%, Ridgewood Energy X Fund, LLC 0.84%, Ridgewood Energy Y Fund, LLC 0.84%, Ridgewood Energy Z Fund, LLC 0.84%, Ridgewood Energy B-1 Fund, LLC 0.84%
G24102Devils Tower	lease	Kosmos Energy Gulf of Mexico Operations, LLC	Murphy Exploration & Production Company - USA 39.22%, Kosmos Energy Gulf of Mexico Operations, LLC 31.72%, MP Gulf of Mexico, LLC 29.06%
G24107Devils Tower	lease	–	Eni Petroleum US LLC share not stated (not included in the totals: BOEM gives different shares for different parts of the lease (the owner groups). The source does not say which part the production comes from, so the share is not used in calculations.), Murphy Exploration & Production Company - USA share not stated (not included in the totals: BOEM gives different shares for different parts of the lease (the owner groups). The source does not say which part the production comes from, so the share is not used in calculations.), Kosmos Energy Gulf of Mexico Operations, LLC share not stated (not included in the totals: BOEM gives different shares for different parts of the lease (the owner groups). The source does not say which part the production comes from, so the share is not used in calculations.)
G26664Geauxpher	lease	Talos ERT LLC	Talos ERT LLC share not stated (not included in the totals: BOEM gives different shares for different parts of the lease (the owner groups). The source does not say which part the production comes from, so the share is not used in calculations.), ZMZ Acquisitions LLC share not stated (not included in the totals: BOEM gives different shares for different parts of the lease (the owner groups). The source does not say which part the production comes from, so the share is not used in calculations.), Kosmos Energy Gulf of Mexico Operations, LLC share not stated (not included in the totals: BOEM gives different shares for different parts of the lease (the owner groups). The source does not say which part the production comes from, so the share is not used in calculations.)
G34441Fourier/Sumter	lease	Kosmos Energy Gulf of Mexico Operations, LLC	Ridgewood Barataria, LLC 23.85%, Talos Exploration LLC 23.85%, Kosmos Energy Gulf of Mexico Operations, LLC 22.5%, Red Willow Offshore, LLC 19.8%, CL&F Offshore LLC 7%, Houston Energy Deepwater Ventures IX, LLC 3%
G36060GC944	lease	Beacon Growthco Operating Company, L.L.C.	Beacon Offshore Energy Exploration LLC 35.08%, Kosmos Energy Gulf of Mexico Operations, LLC 25.04%, Westlawn GOM Asset 3 Holdco LLC 15%, Red Willow Offshore, LLC 12.5%, HEDV Winterfell, LLC 7.55%, CSL Exploration, LP 4.5%, Beacon Growthco Operating Company, L.L.C. 0.33%
G36061GC944	lease	Beacon Growthco Operating Company, L.L.C.	Beacon Offshore Energy Exploration LLC 35.08%, Kosmos Energy Gulf of Mexico Operations, LLC 25.04%, Westlawn GOM Asset 3 Holdco LLC 15%, Red Willow Offshore, LLC 12.5%, HEDV Winterfell, LLC 7.55%, CSL Exploration, LP 4.5%, Beacon Growthco Operating Company, L.L.C. 0.33%
G36694Hadrian South	lease	Kosmos Energy Gulf of Mexico Operations, LLC	Kerr-McGee Oil & Gas Corporation 50%, Kosmos Energy Gulf of Mexico Operations, LLC 33.34%, Navitas Petroleum US, LLC 16.66%

Pipelines and plants

Pipelines, facilities and terminals where Kosmos Energy Gulf of Mexico Operations, LLC is the operator or an owner in the source.

Pipelines and plantsBOEM · 26 Sep 2026

Name	Type	From – to	Status	Role
12" CSNG FLET MC 215 - Platform A MC 254	Gas	Flet MC 215 – Platform A MC 254	In service	operator

Notes

The shares are legal ownership shares at BOEM, not the company's reported production.
The arrows show direction, not volume. The direction is the source's from → to for each pipeline. The source has no flow per pipeline. Pipelines without from and to in the source are shown without direction.
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.
The production is BOEM/BSEE's OGOR-A figures per completion, summed per lease and per field for Jun 2025–Jun 2026: oil and condensate in barrels (bbl), gas in Mcf. The figures come three to four months after the production month, and BOEM marks the latest month as incomplete.
The field operator is the operator BOEM/BSEE gives for the completions in the latest month. The lease operator is the designated operator. The operator and field of the installations are from BOEM's platform file (platmast).
BOEM's pipelines end at an installation or at the boundary to state waters. The route onward to shore, the pipeline owners and the capacity are not in BOEM's data. Only active pipelines of at least 10 inches for oil, gas and condensate are included. The pipeline operator is the operator BOEM gives for the segment in the pipeline file (FACIL_OPERATOR, at the latest inspection). A pipeline is linked to an installation when BOEM's platform id in the pipeline file (platform name, area and block, for example “A MC 807”) equals the platform name without the nickname in brackets, area and block in the platform file (“MC 807 A (Mars)”), and the match is unique.
The lease status (UNIT, PRODUCTION, INITIAL …) is BOEM's word from the map layer as of 26 Sep 2026. A field is shown as producing when OGOR-A has production from the field in Jun 2026.
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
BOEM – platforms, pipelines and rigs (Gulf) BOEM / BSEE · 1 Oct 2026Licence: U.S. Government Work, public domain (17 U.S.C. § 105)Attribution: Source: BOEM/BSEE Data Center. This data is not for navigational use.
BOEM/BSEE – well production by month (OGOR-A, Gulf of Mexico) BOEM / BSEE · 7 Oct 2026Licence: U.S. Government Work, public domain (17 U.S.C. § 105)Attribution: Source: BOEM/BSEE Data Center, OGOR-A

All sources for United States

Not in the data: Flow in each pipeline, where the gas ends up, the buyers of oil and gas and the company's contracts.