Company · the network on the US Outer Continental Shelf

Union Oil Company of California

Union Oil Company of California holds stakes in 6 fields on the US Outer Continental Shelf and operates 1 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), 14 of 16 fields and licences with production: 3.01 million Sm³ o.e.; Estimate · Jul 2025–Jun 2026 · BOEM · 7 Oct 2026
Per day (BOEM): 52,000 barrels o.e./day; Estimate · Jul 2025–Jun 2026 · BOEM · 7 Oct 2026
Fields with a stake: 6; BOEM · 4 Oct 2026
Operator of: 1 fields; BOEM · 7 Oct 2026
Oil, operated, last 12 months: 20,245,971 bbl; Jul 2025–Jun 2026 · BOEM · 7 Oct 2026
Gas, operated, last 12 months: 4,713,108 Mcf; Jul 2025–Jun 2026 · BOEM · 7 Oct 2026
Leases with a share or operatorship: 16; BOEM · 4 Oct 2026
Pipelines operated by the company: 8; 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 14 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: 1 field or licence where the source's shares cannot be used for calculation and 1 field or licence where the production does not cover the whole period or applies to another period. G21801: 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. 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.

Union Oil Company of California6 fields with a stake · operator of 1

Field and shareBOEM · 7 Oct 2026

Facilities and pipelinesBOEM · 26 Sep 2026

Landfall

Field and shareMad Dog share not statedA share in a lease is not a field share.field 8.36 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
GC 782 A (Mad Dog) 1 facility in service
Landfall
The source does not show where the production comes ashore.
Field and shareSaint Malo operator share not statedA share in a lease is not a field share.field 3.35 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 shareStampede share not statedA share in a lease is not a field share.field 1.45 million Sm³ o.e. Jul 2025–Jun 2026
Facilities and pipelines
GC 468 A (Stampede) 1 facility in service
Landfall
The source does not show where the production comes ashore.
Field and shareK2 share not statedA share in a lease is not a field share.field 1.25 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 shareTobago 40.01% in lease G20871A share in a lease is not a field share.field 1.02 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 shareBlind Faith share not statedA 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.

Leases

The leases where Union Oil Company of California 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
G09981Mad Dog	lease	BP Exploration & Production Inc.	BP Exploration & Production Inc. 60.5%, Woodside Energy (Deepwater) Inc. 23.9%, Union Oil Company of California 15.6%
G09982Mad Dog	lease	BP Exploration & Production Inc.	BP Exploration & Production Inc. 60.5%, Woodside Energy (Deepwater) Inc. 23.9%, Union Oil Company of California 15.6%
G15609Mad Dog	lease	BP Exploration & Production Inc.	BP Exploration & Production Inc. 60.5%, Woodside Energy (Deepwater) Inc. 23.9%, Union Oil Company of California 15.6%
G15610Mad Dog	lease	BP Exploration & Production Inc.	BP Exploration & Production Inc. 60.5%, Woodside Energy (Deepwater) Inc. 23.9%, Union Oil Company of California 15.6%
G16641Blind Faith	lease	Chevron U.S.A. Inc.	Chevron U.S.A. Inc. 62.5%, Kerr-McGee Oil & Gas Corporation 25%, Union Oil Company of California 12.5%
G18745Saint Malo	lease	Union Oil Company of California	Union Oil Company of California 38.5%, MP Gulf of Mexico, LLC 25%, Statoil Gulf of Mexico LLC 21.5%, Chevron U.S.A. Inc. 12.5%, Eni Petroleum US LLC 1.25%, Exxon Mobil Corporation 1.25%
G18753Saint Malo	lease	Union Oil Company of California	Union Oil Company of California 38.5%, MP Gulf of Mexico, LLC 25%, Statoil Gulf of Mexico LLC 21.5%, Chevron U.S.A. Inc. 12.5%, Eni Petroleum US LLC 1.25%, Exxon Mobil Corporation 1.25%
G20871Tobago	lease	Shell Offshore Inc.	Union Oil Company of California 40.01%, Shell Offshore Inc. 30%, Chevron U.S.A. Inc. 16.65%, Nexen Petroleum Offshore U.S.A. Inc. 13.34%
G21182Blind Faith	lease	Chevron U.S.A. Inc.	Chevron U.S.A. Inc. 62.5%, Kerr-McGee Oil & Gas Corporation 25%, Union Oil Company of California 12.5%
G21245Saint Malo	lease	Union Oil Company of California	Union Oil Company of California 38.5%, MP Gulf of Mexico, LLC 25%, Statoil Gulf of Mexico LLC 21.5%, Chevron U.S.A. Inc. 12.5%, Eni Petroleum US LLC 1.25%, Exxon Mobil Corporation 1.25%
G21801K2	lease	–	Union Oil Company of California 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.), Ecopetrol America 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.), Nippon Oil Exploration U.S.A. Limited 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.), Kerr-McGee Oil & Gas Corporation 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.), OGOG (K2) Inc. 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.), 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.)
G26313Stampede	lease	Hess Corporation	Union Oil Company of California 25%, Hess Corporation 25%, Nexen Petroleum Offshore U.S.A. Inc. 25%, Statoil Gulf of Mexico LLC 25%
G26315Stampede	lease	Hess Corporation	Union Oil Company of California 25%, Hess Corporation 25%, Nexen Petroleum Offshore U.S.A. Inc. 25%, Statoil Gulf of Mexico LLC 25%
G28100Mad Dog	lease	BP Exploration & Production Inc.	BP Exploration & Production Inc. 60.5%, Woodside Energy (Deepwater) Inc. 23.9%, Union Oil Company of California 15.6%
G33859	lease	BP Exploration & Production Inc.	BP Exploration & Production Inc. 60.5%, Woodside Energy (Deepwater) Inc. 23.9%, Union Oil Company of California 15.6%
G34551	lease	Hess Corporation	Union Oil Company of California 25%, Hess Corporation 25%, Nexen Petroleum Offshore U.S.A. Inc. 25%, Statoil Gulf of Mexico LLC 25%

Pipelines and plants

Pipelines, facilities and terminals where Union Oil Company of California is the operator or an owner in the source.

Pipelines and plantsBOEM · 26 Sep 2026

Name	Type	From – to	Status	Role
10" Blko MFLD-SMS02-00 WR 677 - MFLD-SMS01-00 WR 677	Oil	MFLD-SMS02-00 WR 677 – MFLD-SMS01-00 WR 677	In service	operator
10" Blko MFLD-SMS02-00 WR 677 - MFLD-SMS01-00 WR 677	Oil	MFLD-SMS02-00 WR 677 – MFLD-SMS01-00 WR 677	In service	operator
10" Blko PLET-SMN31-00 WR 634 - PLET-SMS36-00 WR 678	Oil	PLET-SMN31-00 WR 634 – PLET-SMS36-00 WR 678	In service	operator
10" Blko PLET-SMN32-00 WR 634 - PLET-SMS37-00 WR 677	Oil	PLET-SMN32-00 WR 634 – PLET-SMS37-00 WR 677	In service	operator
10" BLKO PLET-SMS31-00 WR 677 - A-Jack St. Malo WR 718	Oil	PLET-SMS31-00 WR 677 – A-Jack St. Malo WR 718	In service	operator
10" BLKO PLET-SMS32-00 WR 677 - A-Jack St. Malo WR 718	Oil	PLET-SMS32-00 WR 677 – A-Jack St. Malo WR 718	In service	operator
10" Blko Psta-SMS41-00 WR 677 - Ptis-SMS33-00 WR 677	Oil	Psta-SMS41-00 WR 677 – Ptis-SMS33-00 WR 677	In service	operator
10" Blko Psta-SMS42-00 WR 677 - Ptis-SMS34-00 WR 677	Oil	Psta-SMS42-00 WR 677 – Ptis-SMS34-00 WR 677	In service	operator
BA A 105 A	Fixed Jacket	–	In service	operator
BA A 105 B	Fixed Jacket	–	In service	operator
EB 159 A	Fixed Jacket	–	In service	operator
EI 32 10	Caisson	–	In service	operator
EI 32 12	Fixed Jacket	–	In service	operator
EI 32 16	Caisson	–	In service	operator
EI 32 20	Caisson	–	In service	operator
EI 32 22	Caisson	–	In service	operator
EI 32 23	Caisson	–	In service	operator
EI 32 24	Caisson	–	In service	operator
EI 32 25	Caisson	–	In service	operator
EI 32 26	Fixed Jacket	–	In service	operator
EI 32 27	Caisson	–	In service	operator
EI 32 30	Caisson	–	In service	operator
EI 32 5	Caisson	–	In service	operator
EI 32 8	Caisson	–	In service	operator
EI 32 A	Fixed Jacket	–	In service	operator
EI 32 A-PRD	Fixed Jacket	–	In service	operator
EI 32 A-QRT	Fixed Jacket	–	In service	operator
EI 32 A-TNK	Fixed Jacket	–	In service	operator
EI 32 CAIS.#29	Fixed Jacket	–	In service	operator
EI 32 E	Fixed Jacket	–	In service	operator
EI 32 E-PRD	Fixed Jacket	–	In service	operator
EI 32 F Prod	Fixed Jacket	–	In service	operator
EI 32 F-CMP	Fixed Jacket	–	In service	operator
EI 32 F-Tank	Fixed Jacket	–	In service	operator
EI 32 F-TRT	Fixed Jacket	–	In service	operator
EI 32 H	Caisson	–	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.
The onward pipelines are pipeline connections in the source data, not measured flow: «downstream» where there is only one way, otherwise «possible route».
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.