Cortez Oil
Operator of record for 20 catalogued wells across 3 states. Every well below links to its full registry page.
Filed as: CORTEZ OIL CO · CORTEZ OIL CORP · Cortez Oil, Inc.
At a glance
Cortez Oil is the operator of record for 20 catalogued U.S. oil & gas wells in 3 states. None is listed as active, 18 (90%) are plugged & abandoned. Its largest concentration is in Colorado, with 15 wells (75% of its portfolio).
Wells operated
20
Active
0
Plugged
18
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Colorado | 15 |
| Illinois | 4 |
| Michigan | 1 |
Well mix
- Oil wells
- 0
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Cortez Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Cortez Oil operate?
Cortez Oil's catalogued wells are spread across 3 states: Colorado (15), Illinois (4) and Michigan (1). Its 15 Colorado wells are 0.0% of the 124,327 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 Cortez Oil’s wells are active, plugged or orphaned?
0% of Cortez Oil's catalogued wells are active, 29 percentage points below the national share of 29%. 90% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Cortez Oil operate?
By product class, 0 (0%) are oil wells and 0 (0%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is 1 Flader in Adams, CO at 6,682 ft. The wells listed below sit in Adams (CO), Weld (CO), Logan (CO) and Washington (CO). State filings spell the name 3 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Cortez Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| 1 Flader | 05-001-05080 | Plugged & abandoned | Other type | Adams, CO | Cortez Oil Co | 6,682 ft |
| 3 Flader | 05-001-05017 | Plugged & abandoned | Other type | Adams, CO | Cortez Oil Co | 6,519 ft |
| 1 Piel | 05-123-05369 | Plugged & abandoned | Other type | Weld, CO | Cortez Oil Co | 5,993 ft |
| 1 Uprr-Reiners | 05-075-07185 | Plugged & abandoned | Other type | Logan, CO | Cortez Oil Co | 5,616 ft |
| 1 Bergman | 05-075-06957 | Plugged & abandoned | Other type | Logan, CO | Cortez Oil Co | 5,585 ft |
| 1 Blake | 05-121-06726 | Plugged & abandoned | Other type | Washington, CO | Cortez Oil Co | 5,092 ft |
| 1 Annable | 05-121-06619 | Plugged & abandoned | Other type | Washington, CO | Cortez Oil Co | 5,008 ft |
| 1 Drum | 05-121-07210 | Plugged & abandoned | Other type | Washington, CO | Cortez Oil Co | 4,996 ft |
| 1 Edwards | 05-121-06493 | Plugged & abandoned | Other type | Washington, CO | Cortez Oil Co | 4,983 ft |
| 1 Wolf | 05-121-06430 | Plugged & abandoned | Other type | Washington, CO | Cortez Oil Co | 4,976 ft |
| 1 Rodemeister | 05-121-06987 | Plugged & abandoned | Other type | Washington, CO | Cortez Oil Co | 4,935 ft |
| 1 Mitchell | 05-121-07222 | Plugged & abandoned | Other type | Washington, CO | Cortez Oil Co | 4,893 ft |
Deepest first where depth is published. See all 20 wells →
Frequently asked questions
How many wells does Cortez Oil operate?
Cortez Oil is the operator of record for 20 catalogued oil & gas wells, with the largest concentration in Colorado (15). Only wells in states WellCensus has ingested are counted.
How many of Cortez Oil's wells are still active?
0 of Cortez Oil's catalogued wells are active; 18 are plugged & abandoned.
In which states does Cortez Oil operate wells?
Cortez Oil is the operator of record for wells in Colorado (15), Illinois (4) and Michigan (1).
Does Cortez Oil operate mostly oil or gas wells?
0 of Cortez Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Cortez Oil's deepest well?
Among wells with a published depth, 1 Flader in Adams, CO is the deepest at 6,682 ft.
Where Cortez Oil's wells are
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, “Cortez Oil — well portfolio”, https://wellcensus.com/operators/cortez-oil-3271 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).