O Fallon Oil & Dev
Operator of record for 2 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
O Fallon Oil & Dev is the operator of record for 2 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 2 (100%) are plugged & abandoned. Its largest concentration is in Illinois, with 2 wells (100% of its portfolio).
Wells operated
2
Active
0
Plugged
2
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 2 |
Well mix
- Oil wells
- 0
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim O Fallon Oil & Dev to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does O Fallon Oil & Dev operate?
O Fallon Oil & Dev's catalogued wells are spread across 1 state: Illinois (2). Its 2 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 O Fallon Oil & Dev’s wells are active, plugged or orphaned?
0% of O Fallon Oil & Dev's catalogued wells are active, 29 percentage points below the national share of 29%. 100% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does O Fallon Oil & Dev 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 Porter Christy in St. Clair, IL at 691 ft.
Notable wells operated by O Fallon Oil & Dev
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Porter Christy | 12-163-00009 | Plugged & abandoned | Other type | St. Clair, IL | O'Fallon Oil & Dev. | 691 ft |
| Louis 2 | 12-163-00008 | Plugged & abandoned | Other type | St. Clair, IL | O'Fallon Oil & Dev. | 600 ft |
Deepest first where depth is published. See all 2 wells →
Frequently asked questions
How many wells does O Fallon Oil & Dev operate?
O Fallon Oil & Dev is the operator of record for 2 catalogued oil & gas wells, with the largest concentration in Illinois (2). Only wells in states WellCensus has ingested are counted.
How many of O Fallon Oil & Dev's wells are still active?
0 of O Fallon Oil & Dev's catalogued wells are active; 2 are plugged & abandoned.
In which states does O Fallon Oil & Dev operate wells?
O Fallon Oil & Dev is the operator of record for wells in Illinois (2).
Does O Fallon Oil & Dev operate mostly oil or gas wells?
0 of O Fallon Oil & Dev's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is O Fallon Oil & Dev's deepest well?
Among wells with a published depth, Porter Christy in St. Clair, IL is the deepest at 691 ft.
Where O Fallon Oil & Dev'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, “O Fallon Oil & Dev — well portfolio”, https://wellcensus.com/operators/o-fallon-oil-dev-108930 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).