Belco Development
Operator of record for 102 catalogued wells across 4 states. Every well below links to its full registry page.
Filed as: BELCO DEVELOPMENT CORP. · BELCO DEVELOPMENT CORPORATION · Belco Development Corp · Belco Development Corporation
At a glance
Belco Development is the operator of record for 102 catalogued U.S. oil & gas wells in 4 states. None is listed as active, 60 (59%) are plugged & abandoned. Its largest concentration is in Utah, with 87 wells (85% of its portfolio).
Wells operated
102
Active
0
Plugged
60
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Utah | 87 |
| Montana | 13 |
| Louisiana | 1 |
| North Dakota | 1 |
Well mix
- Oil wells
- 42
- Gas wells
- 27
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Belco Development to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Belco Development operate?
Belco Development's catalogued wells are spread across 4 states: Utah (87), Montana (13), Louisiana (1) and North Dakota (1). Its 87 Utah wells are 0.2% of the 40,139 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 Belco Development’s wells are active, plugged or orphaned?
0% of Belco Development's catalogued wells are active, 29 percentage points below the national share of 29%. 59% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Belco Development operate?
By product class, 42 (41%) are oil wells and 27 (26%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Zimmerman 1-21 in Roosevelt, MT at 7,800 ft. The wells listed below sit in Roosevelt (MT), Mccone (MT), Powder River (MT), Mckenzie (ND), Musselshell (MT) and Madison (LA) and other counties. State filings spell the name 4 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Belco Development
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Zimmerman 1-21 | 25-085-21131 | Plugged & abandoned | Other type | Roosevelt, MT | Belco Development Corporation | 7,800 ft |
| Anderson 1-7 | 25-085-21130 | Plugged & abandoned | Other type | Roosevelt, MT | Belco Development Corporation | 7,780 ft |
| Welton 1-32 | 25-085-21116 | Plugged & abandoned | Other type | Roosevelt, MT | Belco Development Corporation | 7,670 ft |
| Johnson 1-9 | 25-055-21081 | Plugged & abandoned | Other type | Mccone, MT | Belco Development Corporation | 6,589 ft |
| Belco | 25-075-21903 | Plugged & abandoned | Other type | Powder River, MT | Belco Development Corporation | 6,435 ft |
| Mader-Federal 1-20 | 25-075-21950 | Plugged & abandoned | Other type | Powder River, MT | Belco Development Corporation | 6,200 ft |
| Federal M 3956 1-26 | 25-075-21725 | Plugged & abandoned | Other type | Powder River, MT | Belco Development Corporation | 5,816 ft |
| Edgar Federal 15-12 | 33-053-01537 | Plugged & abandoned | Oil | Mckenzie, ND | Belco Development Corp. | 4,400 ft |
| B.N. 9-15 | 25-065-21147 | Plugged & abandoned | Other type | Musselshell, MT | Belco Development Corporation | 3,740 ft |
| Crescent Ventures 001 | 17-065-20069 | Plugged & abandoned | Other type | Madison, LA | Belco Development Corporation | 3,613 ft |
| Tracy 1-11 | 25-037-21011 | Plugged & abandoned | Other type | Golden Valley, MT | Belco Development Corporation | 3,422 ft |
| Bokma 1 | 25-095-05040 | Other status | Other type | Stillwater, MT | Belco Development Corporation | 2,665 ft |
Deepest first where depth is published. See all 102 wells →
Frequently asked questions
How many wells does Belco Development operate?
Belco Development is the operator of record for 102 catalogued oil & gas wells, with the largest concentration in Utah (87). Only wells in states WellCensus has ingested are counted.
How many of Belco Development's wells are still active?
0 of Belco Development's catalogued wells are active; 60 are plugged & abandoned.
In which states does Belco Development operate wells?
Belco Development is the operator of record for wells in Utah (87), Montana (13), Louisiana (1) and North Dakota (1).
Does Belco Development operate mostly oil or gas wells?
42 of Belco Development's catalogued wells are oil wells and 27 are gas wells; the rest are injection, service or unclassified wells.
What is Belco Development's deepest well?
Among wells with a published depth, Zimmerman 1-21 in Roosevelt, MT is the deepest at 7,800 ft.
Where Belco 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, “Belco Development — well portfolio”, https://wellcensus.com/operators/belco-development-40143 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).