MARATHON OIL COMPANY

Notes

• Operated production in North Dakota in July 2026 (operator per well at NDIC, not an ownership share): 1,111 wells in 18 fields, 1,651,230 barrels of oil and 4,555,884 Mcf of gas from the wells with figures, summed by OESA from the well rows. Wells in WILDCAT are not included.
• The operator is derived, not stated by the source: NDIC gives the operator per well, not per field. OESA shows as operator the company operating the wells with more than half of the field's oil in NDIC's Monthly Production Report for July 2026 (gas when the field has no oil). It is not an ownership share.
• NDIC gives the operator of each well, not ownership shares. The companies' part of the production is therefore operated production, not ownership, and it is never treated as a share. A field gets an operator (marked derived) only when one company operates the wells with more than half of the field's oil in the latest month. When other companies have confidential wells in the field, it is not known who has the most. The oil sold (NDIC's Runs column, which is given for all wells, including the confidential ones) is then used instead, and this is stated at the field. If that does not show anyone with more than half either, the field is shown without an operator. The companies are listed with their names as NDIC writes them, and they are not linked to groups.
• The production is from NDIC's Monthly Production Report (Excel, one file per month, August 2025–July 2026), summed per field over the wells with figures: oil in barrels and gas in Mcf as NDIC gives them (the gas is produced gas, including gas that is flared). Each month is the Excel file as NDIC published it. NDIC states that later amendments are only in the PDF editions, so earlier months may differ slightly from them. Wells in WILDCAT (outside designated fields) and the oil in the SkimmedCrudeRecovery sheet (recovered at disposal wells) are not fields and are not included.
• Confidential wells are in the file without production figures (Oil, Gas, Wtr, Days and Flared are NULL), and NDIC withholds their production. For them NDIC gives only the oil and gas sold (Runs and GasSold). In July 2026 this applied to 255 of 22,466 wells. Fields with such wells show the sum of the reported wells, and this is stated at the field. For the operators the confidential wells are counted separately, and the sums there are marked «too low»; a figure NDIC withholds never becomes 0. The oil sold is only used to derive the operator where the production figures are not enough. NDIC's state totals in the PDF edition of the report are therefore higher than the sum of the fields here, and OESA shows no total for North Dakota as a whole.
• The fields in North Dakota are not in the map layers. The point for a field is the centre of the well positions NDIC gives, calculated by OESA, and it says nothing about the field's extent.

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.

• NDIC – monthly production by well (North Dakota) North Dakota Industrial Commission, Oil and Gas Division · 8 Oct 2026No licence is stated with the data. The terms on the source's websiteAttribution: Source: North Dakota Industrial Commission, Oil and Gas Division

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.