San Mar Oil
Operator of record for 34 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
San Mar Oil is the operator of record for 34 catalogued U.S. oil & gas wells in 1 state. 1 (3%) are active, 33 (97%) plugged & abandoned. Its largest concentration is in Illinois, with 34 wells (100% of its portfolio).
Wells operated
34
Active
1
Plugged
33
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 34 |
Well mix
- Oil wells
- 10
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 3%
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Claim San Mar Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does San Mar Oil operate?
San Mar Oil's catalogued wells are spread across 1 state: Illinois (34). Its 34 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 San Mar Oil’s wells are active, plugged or orphaned?
3% of San Mar Oil's catalogued wells are active, 26 percentage points below the national share of 29%. 97% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does San Mar Oil operate?
By product class, 10 (29%) 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 Gill, Vernon 1 in Edwards, IL at 4,120 ft. The wells listed below sit in Edwards (IL), Wayne (IL) and Wabash (IL).
Notable wells operated by San Mar Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Gill, Vernon 1 | 12-047-22658 | Plugged & abandoned | Other type | Edwards, IL | San Mar Oil Corp. | 4,120 ft |
| Hagood & Taylor 1 | 12-047-22716 | Plugged & abandoned | Oil | Edwards, IL | San Mar Oil Corp. | 4,002 ft |
| Seifert Frank Sr 1 | 12-191-30964 | Plugged & abandoned | Other type | Wayne, IL | San Mar Oil Corp. | 3,475 ft |
| Bromm 1 | 12-185-28817 | Plugged & abandoned | Other type | Wabash, IL | San Mar Oil Corp. | 3,461 ft |
| Shelby John 1 | 12-047-22934 | Plugged & abandoned | Other type | Edwards, IL | San Mar Oil Corp. | 3,440 ft |
| McKibben, Raleigh 2 | 12-047-24058 | Plugged & abandoned | Oil | Edwards, IL | San Mar Oil Corp. | 3,440 ft |
| Mason Hazel 1 | 12-047-23094 | Plugged & abandoned | Other type | Edwards, IL | San Mar Oil Corp. | 3,440 ft |
| Ahlfield Heirs Unit "A" 1 | 12-047-23231 | Plugged & abandoned | Other type | Edwards, IL | San Mar Oil Corp. | 3,430 ft |
| Mckibben Raleigh 3 | 12-047-24071 | Plugged & abandoned | Other type | Edwards, IL | San Mar Oil Corp. | 3,415 ft |
| Tanquary Charles 1 | 12-047-22785 | Plugged & abandoned | Other type | Edwards, IL | San Mar Oil Corp. | 3,400 ft |
| Hagood & Taylor 3 | 12-047-22747 | Plugged & abandoned | Other type | Edwards, IL | San Mar Oil Corp. | 3,400 ft |
| Sheby, Mary 3 | 12-047-23190 | Plugged & abandoned | Oil | Edwards, IL | San Mar Oil Corp. | 3,400 ft |
Deepest first where depth is published. See all 34 wells →
Frequently asked questions
How many wells does San Mar Oil operate?
San Mar Oil is the operator of record for 34 catalogued oil & gas wells, with the largest concentration in Illinois (34). Only wells in states WellCensus has ingested are counted.
How many of San Mar Oil's wells are still active?
1 of San Mar Oil's catalogued wells are active; 33 are plugged & abandoned.
In which states does San Mar Oil operate wells?
San Mar Oil is the operator of record for wells in Illinois (34).
Does San Mar Oil operate mostly oil or gas wells?
10 of San Mar Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is San Mar Oil's deepest well?
Among wells with a published depth, Gill, Vernon 1 in Edwards, IL is the deepest at 4,120 ft.
Where San Mar Oil'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, “San Mar Oil — well portfolio”, https://wellcensus.com/operators/san-mar-oil-97614 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).