Mobil Oil
Operator of record for 1,803 catalogued wells across 11 states. Every well below links to its full registry page.
Filed as: MOBIL OIL CO · MOBIL OIL CORP · MOBIL OIL CORP. · MOBIL OIL CORPORATION · …
At a glance
Mobil Oil is the operator of record for 1,803 catalogued U.S. oil & gas wells in 11 states. 18 (1.0%) are active, 1,482 (82%) plugged & abandoned and 2 flagged as orphaned. Its largest concentration is in California, with 1,586 wells (88% of its portfolio).
Wells operated
1,803
Active
18
Plugged
1,482
Orphaned
2
Portfolio by state
| State | Wells |
|---|---|
| California | 1,586 |
| Illinois | 61 |
| Colorado | 54 |
| Montana | 31 |
| Utah | 21 |
| Arkansas | 15 |
| Kentucky | 11 |
| North Dakota | 11 |
| Mississippi | 9 |
| New Mexico | 3 |
| Michigan | 1 |
Well mix
- Oil wells
- 1,331
- Gas wells
- 48
- Shut-in
- 3
- Active share
- 1%
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Claim your operator profileWhere does Mobil Oil operate?
Mobil Oil's catalogued wells are spread across 11 states: California (1,586), Illinois (61), Colorado (54), Montana (31) and Utah (21) and 6 more. Its 1,586 California wells are 0.7% of the 242,471 catalogued in that state — its largest share of any state. Counts cover only states whose registries WellCensus has ingested with operator names; wells in Nebraska and Texas (location indexes) and in states without a registry ingest are not yet attributed to any operator.
How many of Mobil Oil’s wells are active, plugged or orphaned?
1.0% of Mobil Oil's catalogued wells are active, 28 percentage points below the national share of 29%. 82% are plugged & abandoned, against 47% nationally. 3 wells (0.2%) are shut-in — unplugged but idle. 2 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Mobil Oil operate?
By product class, 1,331 (74%) are oil wells and 48 (3%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is F11x-34p O'Connell in Garfield, CO at 18,422 ft. The wells listed below sit in Garfield (CO), Mckenzie (ND), Montrose (CO), Forrest (MS), Smith (MS) and Stark (ND) and other counties. State filings spell the name 8 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Mobil Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| F11x-34p O'Connell | 05-045-06723 | Plugged & abandoned | Other type | Garfield, CO | Mobil Oil Corporation | 18,422 ft |
| H. J. Dahl 1 | 33-053-01597 | Plugged & abandoned | Oil | Mckenzie, ND | Mobil Oil Corp. | 14,310 ft |
| 1 Moon Mesa Unit (Fed) | 05-085-06009 | Plugged & abandoned | Other type | Montrose, CO | Mobil Oil Corporation | 14,268 ft |
| USA Es 2531 1 1 | 23-035-20027 | Plugged & abandoned | Other type | Forrest, MS | Mobil Oil Corporation | 14,000 ft |
| Harlie L Clark Etal 1 1 | 23-129-00263 | Plugged & abandoned | Oil | Smith, MS | Mobil Oil Corporation | 13,805 ft |
| J. F. Fisher 1 | 33-089-00279 | Plugged & abandoned | Oil | Stark, ND | Mobil Oil Corp. | 12,570 ft |
| William Bernhardt 1 | 33-089-00242 | Plugged & abandoned | Oil | Stark, ND | Mobil Oil Corp. | 12,550 ft |
| Pearl Olstad 1 | 33-033-00129 | Plugged & abandoned | Oil | Golden Valley, ND | Mobil Oil Corp. | 12,457 ft |
| 15-29 Colorow-Gulch Federal | 05-103-08197 | Plugged & abandoned | Other type | Rio Blanco, CO | Mobil Oil Corporation | 12,045 ft |
| Aloys Muller F44-20-P | 25-091-05022 | Plugged & abandoned | Oil | Sheridan, MT | Mobil Oil Corp. | 12,033 ft |
| Rue F-44-34-P | 25-021-05120 | Plugged & abandoned | Other type | Dawson, MT | Mobil Oil Corp. | 10,809 ft |
| 1 Brush Creek Unit (Unit Tr | 05-077-08043 | Plugged & abandoned | Other type | Mesa, CO | Mobil Oil Corporation | 10,330 ft |
Deepest first where depth is published. See all 1,803 wells →
Frequently asked questions
How many wells does Mobil Oil operate?
Mobil Oil is the operator of record for 1,803 catalogued oil & gas wells, with the largest concentration in California (1,586). Only wells in states WellCensus has ingested are counted.
How many of Mobil Oil's wells are still active?
18 of Mobil Oil's catalogued wells are active; 1,482 are plugged & abandoned and 2 are flagged as orphaned.
In which states does Mobil Oil operate wells?
Mobil Oil is the operator of record for wells in California (1,586), Illinois (61), Colorado (54), Montana (31), Utah (21), Arkansas (15), Kentucky (11), North Dakota (11), Mississippi (9), New Mexico (3) and Michigan (1).
Does Mobil Oil operate mostly oil or gas wells?
1,331 of Mobil Oil's catalogued wells are oil wells and 48 are gas wells; the rest are injection, service or unclassified wells.
What is Mobil Oil's deepest well?
Among wells with a published depth, F11x-34p O'Connell in Garfield, CO is the deepest at 18,422 ft.
Where Mobil Oil's wells are
- Oil & gas wells in California· 1,586 operated by Mobil Oil
- Oil & gas wells in Illinois· 61 operated by Mobil Oil
- Oil & gas wells in Colorado· 54 operated by Mobil Oil
- Oil & gas wells in Montana· 31 operated by Mobil Oil
- Oil & gas wells in Utah· 21 operated by Mobil Oil
- Oil & gas wells in Arkansas· 15 operated by Mobil Oil
- Largest U.S. well operators
- All well operators
About this data
Source: State oil & gas regulator registries (operator of record as filed, exact-normalized across states) plus the USGS United States Documented Orphaned Well Database (2026), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “Mobil Oil — well portfolio”, https://wellcensus.com/operators/mobil-oil-2578 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).