Calvert Seeligson
Operator of record for 5 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Calvert Seeligson is the operator of record for 5 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 4 (80%) are plugged & abandoned. Its largest concentration is in Colorado, with 5 wells (100% of its portfolio).
Wells operated
5
Active
0
Plugged
4
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Colorado | 5 |
Well mix
- Oil wells
- 0
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Calvert Seeligson to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Calvert Seeligson operate?
Calvert Seeligson's catalogued wells are spread across 1 state: Colorado (5). Its 5 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 Calvert Seeligson’s wells are active, plugged or orphaned?
0% of Calvert Seeligson's catalogued wells are active, 29 percentage points below the national share of 29%. 80% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Calvert Seeligson 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 De Ford in Weld, CO at 6,919 ft. The wells listed below sit in Weld (CO), Morgan (CO) and Logan (CO).
Notable wells operated by Calvert Seeligson
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| 1 De Ford | 05-123-05533 | Plugged & abandoned | Other type | Weld, CO | Calvert-Seeligson | 6,919 ft |
| 1 Malo | 05-123-05497 | Plugged & abandoned | Other type | Weld, CO | Calvert-Seeligson | 6,737 ft |
| 1 Robert Bicek | 05-087-05064 | Plugged & abandoned | Other type | Morgan, CO | Calvert-Seeligson | 4,925 ft |
| 1 Ills | 05-075-05969 | Plugged & abandoned | Other type | Logan, CO | Calvert-Seeligson | 4,805 ft |
| 2 Kaepernik | 05-075-40017 | Other status | Other type | Logan, CO | Calvert-Seeligson | — |
Deepest first where depth is published. See all 5 wells →
Frequently asked questions
How many wells does Calvert Seeligson operate?
Calvert Seeligson is the operator of record for 5 catalogued oil & gas wells, with the largest concentration in Colorado (5). Only wells in states WellCensus has ingested are counted.
How many of Calvert Seeligson's wells are still active?
0 of Calvert Seeligson's catalogued wells are active; 4 are plugged & abandoned.
In which states does Calvert Seeligson operate wells?
Calvert Seeligson is the operator of record for wells in Colorado (5).
Does Calvert Seeligson operate mostly oil or gas wells?
0 of Calvert Seeligson's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Calvert Seeligson's deepest well?
Among wells with a published depth, 1 De Ford in Weld, CO is the deepest at 6,919 ft.
Where Calvert Seeligson'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, “Calvert Seeligson — well portfolio”, https://wellcensus.com/operators/calvert-seeligson-12208 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).