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OESAAnalysis

Company · the network on the Norwegian shelf

Wellesley Petroleum

Wellesley Petroleum holds stakes in one field on the Norwegian shelf. The map shows how the fields connect to pipelines, landfall and markets, and which 2 rigs have drilled for the company in the last three years.

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Calculated equity production
0.000 million Sm³ o.e.
Estimate · Aug 2025–Jul 2026 · Sodir, production · 7 Oct 2026
Share of Norwegian production
0.000%
Estimate · Sodir, production · 7 Oct 2026
Per day
0 barrels o.e./day
Estimate · Sodir, production · 7 Oct 2026
Fields with a stake
1
Sodir, licensees · 7 Oct 2026
Operator of
0 fields
Sodir, licensees · 7 Oct 2026
Rigs that have drilled for the company in the last three years
2
Sodir, wellbores · 7 Oct 2026

Estimate: Calculated by OESA, not figures from the company: for each field the company's current share is multiplied by the field's marketable production (Aug 2025–Jul 2026) from the Norwegian Offshore Directorate, and the results are summed. 1 Sm³ o.e. = 6.29 barrels; rounded to the nearest 1,000 above 10,000, the nearest 100 above 1,000 and the nearest 10 above 100.

The network

From owner to market. Links without their own label have their source in the column heading; curated, derived and possible 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 Sodir data
  • curated from Sodir's field description
  • possible onward route, not measured flow
  • planned or not in service

The links show direction, not volume.

Wellesley Petroleum1 fields with a stakeAt Sodir: Wellesley Petroleum AS
Field and shareSodir, licensees · 7 Oct 2026; Sodir, fields · 28 Sep 2026; Sodir, production · 7 Oct 2026
Facilities and pipelinesSodir, facilities · 7 Oct 2026; Sodir, pipelines · 7 Oct 2026
Landfall
Market
  1. Field and shareHuldra 5.00% unchanged since 30 Jun 2025Shut down
    Facilities and pipelines

    No facilities in service at Sodir

    • Huldra Gassrør gas · 22″ · decommissioned
    • Huldra Kondensatrør condensate · 8″ · abandoned in place
    • Valemon Gassrør gas · 22″ · in from Valemon · decommissioned
    Landfall

    Not in the data.

    Market

    Not in the data.

Rigs

Rigs that have drilled for Wellesley Petroleum in the last three yearsSodir, wellbores · 7 Oct 2026; Sodir, mobile facilities · 7 Oct 2026

RigResponsible company (Sodir)Latest wellFieldsSpuddedWellbores, 3 yrs
Deepsea YantaiOdfjell Drilling35/7-2exploration15 Jul 20262
COSLPromoterCOSL35/10-12 Sexploration4 Jun 20242

Fleet

Rigs drilling, offshore vessels at the facilities in the AIS picture 7 Oct 2026, 14:34 UTC and the supply vessels from the base in the last 30 days.

Rigs

Norwegian Offshore Directorate, exploration wells being drilled (NLOD 2.0), 7 Oct 2026 · Norwegian Offshore Directorate, wellbores spudded in the last 120 days (NLOD 2.0), 7 Oct 2026 · AIS from Kystverket (Norwegian Coastal Administration, Kystdatahuset real-time picture) (NLOD 1.0), 7 Oct 2026, 14:34 UTC · OESA, rig key Sodir ↔ MMSI ↔ IMO (curated: name match in AIS and SafeSeaNet, checked against the well) (NLOD 1.0 / NLOD 2.0), 7 Oct 2026

Supply vessels from the base, last 30 days

Reported departures by offshore vessels (register type in SafeSeaNet). Supply base: Norwegian Offshore Directorate (the field's main supply base); the port's position from the World Port Index, Wikidata or OpenStreetMap (NLOD 2.0 / offentlig eiendom / ODbL), 28 Sep 2026 · Norwegian Coastal Administration, Kystdatahuset: reported voyages and register type (SafeSeaNet) (NLOD 1.0), 6 Oct 2026

Who charters a rig or vessel, and at what rate, is not in open data. A vessel is linked to a field only when AIS shows it within 2 km of one of the field's own facilities or its host facility, at under 1 knot – that says the vessel was there, not who it works for. Facilities on the export route do not count. Tankers loading oil from production ships (FPSOs) and loading buoys are not included. Supply vessels per base are based on reported departures (SafeSeaNet). The destination is usually just the sea area (“Offshoreinst. Nordsjøen”, “… Barentshavet”), so the field the vessel supplies is not stated. Peterhead is British and has no departures in Kystdatahuset. Ship data: Norwegian Coastal Administration. Not for navigation.

Export routes for the fields

Pipeline systems and plants (TUF) on the way from the fields of Wellesley Petroleum that Wellesley Petroleum neither owns nor operates. Those the company owns or operates are in the table above. Each field is listed with its strongest link. “With own pipelines” means that the field's pipelines belong to the system at Sodir.

Sodir, pipeline systems and plants · 7 Oct 2026

Supply bases

The main supply base the Norwegian Offshore Directorate lists for each field. Sodir, supply base · 28 Sep 2026

Connected to

Partners

The companies Wellesley Petroleum shares the most fields with, by current stakes. Sodir, licensees · 7 Oct 2026

Responsible for the rigs that have drilled for the company

The company Sodir lists as responsible for each rig, not necessarily the owner. Sodir, mobile facilities · 7 Oct 2026

Pipeline systems and plants

Events

Ownership changes, exploration wells and discoveries, rigs that move, production start-up and contracts, with a link to the source.

Last 12 months (7 Oct 2025–7 Oct 2026). Ownership: name changes and moves within a group are left out. The field is named only when the licence owns the field directly at Sodir. Wells: exploration wells (wildcat and appraisal). Development wells appear under Rigs when a rig moves there. Rigs: derived by OESA from Sodir's wellbores. An event when a moveable rig spuds a development or exploration well for another operator, or more than 3 km from its previous wellbore in another field or licence. Moves between templates on the same field are not included. «Came from» is the rig's previous wellbore at Sodir. The responsible company is the one Sodir lists as responsible for the rig today, not necessarily the owner. Sources: Norwegian Offshore Directorate (Sodir, NLOD 2.0): licence transfers (retrieved 7 Oct 2026), exploration wells and discoveries (7 Oct 2026), wellbores with drilling rig and the company responsible for the rig (7 Oct 2026) and field status (7 Oct 2026).

Economics

Accounts

Key figures from the annual accounts in the Brønnøysund register for the Norwegian companies behind it, in the currency the company reports in. The figures cover the whole company, not just the Norwegian shelf.

Wellesley Petroleum AScompany · org. no. 913 561 473

Year (NOK)RevenueOperating profitNet profit
20252.7 m−164 m−46.4 m
20240−285 m−58.4 m
20233.4 bn3.2 bn3.5 bn

Sources: Brønnøysund Register Centre, Register of Company Accounts (key figures), NLOD 2.0, 7 Oct 2026. The API is described as a temporary R&D API. The organisation numbers come from the Norwegian Offshore Directorate's company table. Norwegian Offshore Directorate, companies with organisation numbers, NLOD 2.0, 7 Oct 2026. The estimates are calculated by OESA and are not the companies' own figures.

Notes

Sources

All figures and links on the page come from these sources. Curated links are entered by hand by OESA from the source text, and the quote is checked against the source at every build.

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