Tandem Oil
Operator of record for 20 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: TANDEM OIL CO · TANDEM OIL INC
At a glance
Tandem Oil is the operator of record for 20 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 17 (85%) are plugged & abandoned and 1 flagged as orphaned. Its largest concentration is in Colorado, with 12 wells (60% of its portfolio).
Wells operated
20
Active
0
Plugged
17
Orphaned
1
Portfolio by state
| State | Wells |
|---|---|
| Colorado | 12 |
| Oklahoma | 8 |
Well mix
- Oil wells
- 5
- Gas wells
- 8
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Tandem Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Tandem Oil operate?
Tandem Oil's catalogued wells are spread across 2 states: Colorado (12) and Oklahoma (8). Its 12 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 Tandem Oil’s wells are active, plugged or orphaned?
0% of Tandem Oil's catalogued wells are active, 29 percentage points below the national share of 29%. 85% are plugged & abandoned, against 47% nationally. 1 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Tandem Oil operate?
By product class, 5 (25%) are oil wells and 8 (40%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is 34-34 Caitlin in Adams, CO at 7,965 ft. The wells listed below sit in Adams (CO), Morgan (CO), Logan (CO) and Mayes (OK). State filings spell the name 2 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Tandem Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| 34-34 Caitlin | 05-001-08860 | Plugged & abandoned | Gas | Adams, CO | Tandem Oil Co | 7,965 ft |
| 24-7 Bogey Federal | 05-087-07954 | Plugged & abandoned | Gas | Morgan, CO | Tandem Oil Co | 6,295 ft |
| 42-13 Daniel | 05-087-07939 | Plugged & abandoned | Oil | Morgan, CO | Tandem Oil Co | 6,286 ft |
| 12-18 Cw State | 05-087-07983 | Plugged & abandoned | Oil | Morgan, CO | Tandem Oil Co | 6,280 ft |
| 33-7x West Greeley Farms | 05-087-08040 | Plugged & abandoned | Gas | Morgan, CO | Tandem Oil Co | 6,274 ft |
| 32-1 Snoopy | 05-087-07959 | Plugged & abandoned | Oil | Morgan, CO | Tandem Oil Co | 6,075 ft |
| 31-12 Vallery | 05-087-07922 | Plugged & abandoned | Gas | Morgan, CO | Tandem Oil Co | 5,975 ft |
| 33-7 West Greeley Farms | 05-087-08035 | Plugged & abandoned | Other type | Morgan, CO | Tandem Oil Co | 5,730 ft |
| 32-10 Federal | 05-075-09201 | Plugged & abandoned | Other type | Logan, CO | Tandem Oil Co | 5,680 ft |
| 33-10 Chimney Canyon Graz Assoc | 05-075-09228 | Plugged & abandoned | Other type | Logan, CO | Tandem Oil Co | 5,670 ft |
| T 21-22 South Fork Cattle | 05-075-09217 | Plugged & abandoned | Other type | Logan, CO | Tandem Oil Co | 5,375 ft |
| Yoder #2 | 35-097-20774 | Other status | Gas | Mayes, OK | Tandem Oil Inc | — |
Deepest first where depth is published. See all 20 wells →
Frequently asked questions
How many wells does Tandem Oil operate?
Tandem Oil is the operator of record for 20 catalogued oil & gas wells, with the largest concentration in Colorado (12). Only wells in states WellCensus has ingested are counted.
How many of Tandem Oil's wells are still active?
0 of Tandem Oil's catalogued wells are active; 17 are plugged & abandoned and 1 are flagged as orphaned.
In which states does Tandem Oil operate wells?
Tandem Oil is the operator of record for wells in Colorado (12) and Oklahoma (8).
Does Tandem Oil operate mostly oil or gas wells?
5 of Tandem Oil's catalogued wells are oil wells and 8 are gas wells; the rest are injection, service or unclassified wells.
What is Tandem Oil's deepest well?
Among wells with a published depth, 34-34 Caitlin in Adams, CO is the deepest at 7,965 ft.
Where Tandem 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, “Tandem Oil — well portfolio”, https://wellcensus.com/operators/tandem-oil-4671 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).