What Wellesley Petroleum does

Wellesley Petroleum AS is a privately-held Norwegian upstream oil and gas company headquartered in Stavanger, founded in 2014 and operating with a headcount in the 11–50 range. The company is focused exclusively on hydrocarbon exploration, appraisal and development on the Norwegian Continental Shelf, holding participating interests across multiple production licences in partnership with Norwegian majors including Equinor, Aker BP, DNO Norge, Petoro, Vår Energi and Inpex Idemitsu Norge.

Its asset base spans three principal clusters: the Carmen gas-condensate discovery in production licence PL1148 (preliminary recoverable resources of 21–107 million barrels of oil equivalent), the Ringvei Vest subsea development combining seven discoveries and one prospect across eight licences with approximately 240 million barrels of oil equivalent gross resources tied back to the Troll B platform via 13 wells through six templates, and a flagship joint exploration programme with Equinor targeting high-pressure, high-temperature (HPHT) prospects in the northern North Sea with plans for up to 15 wells between 2027 and 2030. The company operates as a non-operator partner in most licence blocks but retains operator responsibilities for up to five HPHT wells per year under the Equinor agreement, supported by its core technical capability in HPHT drilling.

Wellesley generates revenue through commodity sales of produced hydrocarbons tied back to existing third-party infrastructure (Kvitebjørn, Troll B); however, its material assets remain in pre-production or appraisal phase, making it effectively pre-revenue at present. Capital was anchored by a $250 million round from Blue Water Energy in 2015, with a near-term drilling campaign commencing January 2026 via the Eidesvik Offshore PSV Viking Princess across a 300–365 day programme.

Name

Wellesley Petroleum

Legal name

Wellesley Petroleum AS

Website

https://wellesley.no

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

11–50 employees

Short description

Wellesley Petroleum is a Stavanger-based, privately-held Norwegian oil and gas exploration and production company focused on the Norwegian Continental Shelf, participating in the Carmen, Ringvei Vest and HPHT joint venture projects with major Norwegian operators.

Ownership category

akta.pro rank

Product category

Upstream Oil and Gas Exploration and Production

NAICS

Oil and Gas Extraction (211), Drilling Oil and Gas Wells (213111)

SIC

Crude Petroleum & Natural Gas (1311), Oil & Gas Field Exploration Services (1382)

akta.pro primary industry

Drilling & Well Construction (E&P Operator-led) (EUALAAAD)

Keywords

• Hydrocarbon exploration
• Oil and gas production
• Upstream operations
• HPHT drilling
• Subsea development

Headquarters

HQ city

Stavanger

HQ country

Norway

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Services

Cost components

Supply Chain, Operations, Technology or R&D, Infrastructure, Personnel

Core offering

Wellesley Petroleum AS is a Norwegian upstream oil and gas company focused on hydrocarbon exploration and production on the Norwegian Continental Shelf. Its activities include drilling appraisal and exploration wells, appraising gas-condensate discoveries such as the Carmen field (PL1148), and participating in subsea tie-back development projects such as Ringvei Vest. The company also co-invests in a joint HPHT exploration program with Equinor targeting up to 15 wells between 2027 and 2030 in the northern North Sea.

Product overview

Wellesley Petroleum is an oil and gas exploration and production company operating on the Norwegian Continental Shelf (NCS). The company does not offer distinct software products or technology platforms. Its core business activities include hydrocarbon exploration through appraisal wells, development of gas and condensate discoveries via subsea tie-back projects, and participation in joint exploration initiatives. Key assets and projects include the Carmen gas-condensate field (production license PL1148), participation in the Ringvei Vest subsea development project combining seven discoveries, and a joint HPHT (high-pressure, high-temperature) exploration program with Equinor targeting up to 15 wells between 2027-2030.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• Carmen field recoverable resources estimated at 21-107 million barrels of oil equivalent
• +2 more outcomes

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Nine partnerships are on record, tiered core, flagship and minor.

• DNO Norge AScoreStrategic or Co-development Partner · 22 June 2026DNO is the operator of production license PL1148 where the Carmen gas-condensate discovery was made. Wellesley holds a participating interest alongside DNO, Equinor, and Aker BP. The partnership is evaluating hydraulic fracturing to unlock tight reservoirs in the Etive Formation.
• Equinor Energy AScoreStrategic or Co-development Partner · 22 June 2026Equinor is partner in PL1148 (Carmen discovery) and co-investor in the Ringvei Vest project. The companies have also launched a joint exploration project for HPHT prospects in the northern North Sea, planning up to 15 wells between 2027-2030.
• Aker BP ASAcoreStrategic or Co-development Partner · 22 June 2026Aker BP is partner in both the Carmen discovery (PL1148) and the Ringvei Vest subsea development project. The partnership spans eight licences with seven owners including Aker BP.
• Inpex Idemitsu NorgecoreStrategic or Co-development Partner · 18 June 2026Inpex Idemitsu Norge is one of seven owners in the Ringvei Vest project, which combines seven discoveries and one prospect in the Norwegian sector of the North Sea with estimated gross resources of 240 million barrels of oil equivalent.
• Vår EnergicoreStrategic or Co-development Partner · 18 June 2026Vår Energi is one of seven owners in the Ringvei Vest project, a subsea development combining multiple discoveries linked to the Troll B platform.
• PetorocoreStrategic or Co-development Partner · 18 June 2026Petoro is one of seven owners in the Ringvei Vest project, participating in the multi-discovery subsea tie-back development to Troll B platform.
• Equinor Energy ASflagshipStrategic or Co-development Partner · 6 March 2026Joint exploration project on the Norwegian Continental Shelf focused on high-pressure, high-temperature (HPHT) prospects in the northern North Sea. Plans to drill up to 15 exploration wells between 2027 and 2030, with Wellesley operating up to five HPHT wells annually while both companies retain full independence within existing licence structures.
• Eidesvik OffshoreOthers · 26 December 2025Eidesvik Offshore is providing its 2013-built LNG-powered PSV Viking Princess vessel to support drilling operations with the Deepsea Yantai semi-submersible rig starting January 2026. The vessel will support plugging and abandonment of one well and drilling of four consecutive wells over an estimated 300-365 day campaign.
• Sval EnergiminorStrategic or Co-development Partner · 26 December 2025Sval Energi (a DNO subsidiary) is one of three operators booking the Eidesvik Offshore vessel Viking Princess for drilling operations alongside DNO Norge and Wellesley Petroleum.

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Aker BP ASA: Aker BP is one of the largest independent E&P operators on the Norwegian Continental Shelf and a direct co-investor with Wellesley in both PL1148 Carmen and the Ringvei Vest project across multiple licences.
• Vår Energi ASA: Vår Energi is one of seven owners in the Ringvei Vest subsea development tied to Troll B and operates extensively on the NCS, making it a direct comparable NCS-focused E&P and Wellesley partner.
• Sval Energi AS: Sval Energi is a DNO subsidiary and active Norwegian Continental Shelf E&P; it is a co-booker of the Viking Princess vessel alongside Wellesley for the upcoming drilling campaign.
• Neptune Energy Norge AS: Neptune Energy operates Norwegian North Sea fields and pursues tie-back developments similar to Wellesley's Carmen and Ringvei Vest strategies, making it a strong comparable on capital-efficient subsea developments.
• Spirit Energy AS: Spirit Energy is an NCS-focused exploration and production company operating multiple licences offshore Norway, directly comparable to Wellesley as a mid-size private-equity-backed NCS E&P.
• DNO ASA: DNO Norge operates production licence PL1148 containing the Carmen discovery alongside Wellesley, and is the parent of Sval Energi which is also a co-venturer in the recent Eidesvik drilling campaign with Wellesley.

Regional players

• MOL Norge AS: MOL Norge is a Norwegian upstream operator with NCS exploration and development interests, comparable to Wellesley as a non-Norway-major E&P with partnership-led asset exposure on the NCS.
• Inpex Corporation: Inpex Idemitsu Norge is one of seven owners of the Ringvei Vest project and operates Norwegian upstream assets, making it a relevant NCS-focused peer with cross-border parentage.

Broad incumbents

• Petoro AS: Petoro manages the Norwegian State's Direct Financial Interest (SDFI) in NCS petroleum assets and is one of seven owners of Ringvei Vest, making it a structural NCS partner and comparable.
• Equinor ASA: Equinor is the NCS supermajor, Wellesley's joint HPHT exploration partner (15-well program 2027–2030) and a co-investor in Carmen and Ringvei Vest, providing a direct apples-to-apples benchmark for NCS exploration economics.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Wellesley Petroleum