Union Development
Operator of record for 47 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: UNION DEVELOPMENT CO · Union Development Company, Inc
At a glance
Union Development is the operator of record for 47 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 3 (6%) are plugged & abandoned. Its largest concentration is in Michigan, with 46 wells (98% of its portfolio).
Wells operated
47
Active
0
Plugged
3
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Michigan | 46 |
| California | 1 |
Well mix
- Oil wells
- 1
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Union Development to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Union Development operate?
Union Development's catalogued wells are spread across 2 states: Michigan (46) and California (1). Its 46 Michigan wells are 0.1% of the 85,673 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 Union Development’s wells are active, plugged or orphaned?
0% of Union Development's catalogued wells are active, 29 percentage points below the national share of 29%. 6% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Union Development operate?
By product class, 1 (2%) 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 Richardson, May 1 in Osceola, MI at 5,317 ft. The wells listed below sit in Osceola (MI), Missaukee (MI), Clare (MI), Ogemaw (MI), Jackson (MI) and Midland (MI). 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 Union Development
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Richardson, May 1 | 21-133-13640 | Other status | Other type | Osceola, MI | Union Development Co | 5,317 ft |
| Merrill-Palmer School 1 | 21-113-19057 | Other status | Other type | Missaukee, MI | Union Development Co | 5,254 ft |
| Buning, Arthur 1 | 21-113-20389 | Other status | Other type | Missaukee, MI | Union Development Co | 5,223 ft |
| Miltner, Henry Et Al A-1 | 21-035-17683 | Other status | Other type | Clare, MI | Union Development Co | 5,167 ft |
| Potter, Frank 1 | 21-113-16995 | Other status | Other type | Missaukee, MI | Union Development Co | 4,907 ft |
| State Enterprise A-1 | 21-113-15660 | Other status | Other type | Missaukee, MI | Union Development Co | 4,723 ft |
| State Rose 1 | 21-129-16068 | Other status | Other type | Ogemaw, MI | Union Development Co | 4,507 ft |
| Magnus, Mary Et Al 1 | 21-035-14537 | Other status | Other type | Clare, MI | Union Development Co | 4,250 ft |
| Kunning, Richard 1 | 21-129-18243 | Other status | Other type | Ogemaw, MI | Union Development Co | 4,188 ft |
| Groshko, John 1 | 21-075-21391 | Other status | Other type | Jackson, MI | Union Development Co | 4,091 ft |
| Burns, Thomas J. 1 | 21-111-13889 | Other status | Other type | Midland, MI | Union Development Co | 4,003 ft |
| Bell, Earl G. 1 | 21-133-15700 | Other status | Other type | Osceola, MI | Union Development Co | 3,969 ft |
Deepest first where depth is published. See all 47 wells →
Frequently asked questions
How many wells does Union Development operate?
Union Development is the operator of record for 47 catalogued oil & gas wells, with the largest concentration in Michigan (46). Only wells in states WellCensus has ingested are counted.
How many of Union Development's wells are still active?
0 of Union Development's catalogued wells are active; 3 are plugged & abandoned.
In which states does Union Development operate wells?
Union Development is the operator of record for wells in Michigan (46) and California (1).
Does Union Development operate mostly oil or gas wells?
1 of Union Development's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Union Development's deepest well?
Among wells with a published depth, Richardson, May 1 in Osceola, MI is the deepest at 5,317 ft.
Where Union Development'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, “Union Development — well portfolio”, https://wellcensus.com/operators/union-development-17057 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).