Mammoth Prod & Refg
Operator of record for 22 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Mammoth Prod & Refg is the operator of record for 22 catalogued U.S. oil & gas wells in 1 state. 5 (23%) are active, 16 (73%) plugged & abandoned and 1 flagged as orphaned. Its largest concentration is in Illinois, with 22 wells (100% of its portfolio).
Wells operated
22
Active
5
Plugged
16
Orphaned
1
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 22 |
Well mix
- Oil wells
- 9
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 23%
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Claim your operator profileWhere does Mammoth Prod & Refg operate?
Mammoth Prod & Refg's catalogued wells are spread across 1 state: Illinois (22). Its 22 Illinois wells are 0.0% of the 174,478 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 Mammoth Prod & Refg’s wells are active, plugged or orphaned?
23% of Mammoth Prod & Refg's catalogued wells are active, 6 percentage points below the national share of 29%. 73% 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 Mammoth Prod & Refg operate?
By product class, 9 (41%) 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 Bell 1 in Richland, IL at 3,681 ft. The wells listed below sit in Richland (IL), Wayne (IL) and Edwards (IL).
Notable wells operated by Mammoth Prod & Refg
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Bell 1 | 12-159-01636 | Orphaned | Oil | Richland, IL | Mammoth Prod & Refg | 3,681 ft |
| Garrison, D.S. 1 | 12-191-00122 | Plugged & abandoned | Other type | Wayne, IL | Mammoth Prod & Refg | 3,412 ft |
| Goede, Albert A-2 | 12-047-00280 | Active | Injection | Edwards, IL | Mammoth Prod & Refg | 3,320 ft |
| Gillispie, J H 2 | 12-047-01088 | Active | Injection | Edwards, IL | Mammoth Prod & Refg | 3,305 ft |
| Davis Anna 1 | 12-191-01286 | Plugged & abandoned | Oil | Wayne, IL | Mammoth Prod & Refg | 3,272 ft |
| Emmons 1 | 12-191-01287 | Plugged & abandoned | Other type | Wayne, IL | Mammoth Prod & Refg | 3,264 ft |
| Moats-Luthe Comm 1 | 12-047-00169 | Active | Injection | Edwards, IL | Mammoth Prod & Refg | 3,264 ft |
| Steffin Heirs 1 | 12-047-00153 | Active | Injection | Edwards, IL | Mammoth Prod & Refg | 3,259 ft |
| Miller 1 | 12-191-05874 | Plugged & abandoned | Other type | Wayne, IL | Mammoth Prod & Refg | 3,259 ft |
| Bell A-2 | 12-159-00086 | Plugged & abandoned | Other type | Richland, IL | Mammoth Prod & Refg | 3,116 ft |
| Steward Glenn 2A | 12-159-01640 | Plugged & abandoned | Oil | Richland, IL | Mammoth Prod & Refg | 3,115 ft |
| Steward Glenn 1A | 12-159-01639 | Plugged & abandoned | Oil | Richland, IL | Mammoth Prod & Refg | 3,115 ft |
Deepest first where depth is published. See all 22 wells →
Frequently asked questions
How many wells does Mammoth Prod & Refg operate?
Mammoth Prod & Refg is the operator of record for 22 catalogued oil & gas wells, with the largest concentration in Illinois (22). Only wells in states WellCensus has ingested are counted.
How many of Mammoth Prod & Refg's wells are still active?
5 of Mammoth Prod & Refg's catalogued wells are active; 16 are plugged & abandoned and 1 are flagged as orphaned.
In which states does Mammoth Prod & Refg operate wells?
Mammoth Prod & Refg is the operator of record for wells in Illinois (22).
Does Mammoth Prod & Refg operate mostly oil or gas wells?
9 of Mammoth Prod & Refg's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Mammoth Prod & Refg's deepest well?
Among wells with a published depth, Bell 1 in Richland, IL is the deepest at 3,681 ft.
Where Mammoth Prod & Refg'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, “Mammoth Prod & Refg — well portfolio”, https://wellcensus.com/operators/mammoth-prod-refg-67002 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).