Diamond Shamrock
Operator of record for 115 catalogued wells across 6 states. Every well below links to its full registry page.
Filed as: DIAMOND SHAMROCK CORPORATION · Diamond Shamrock Corp · Diamond Shamrock Corporation
At a glance
Diamond Shamrock is the operator of record for 115 catalogued U.S. oil & gas wells in 6 states. None is listed as active, 108 (94%) are plugged & abandoned. Its largest concentration is in Arkansas, with 56 wells (49% of its portfolio).
Wells operated
115
Active
0
Plugged
108
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Arkansas | 56 |
| Louisiana | 19 |
| Utah | 19 |
| Montana | 14 |
| Wyoming | 6 |
| West Virginia | 1 |
Well mix
- Oil wells
- 6
- Gas wells
- 73
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Diamond Shamrock to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Diamond Shamrock operate?
Diamond Shamrock's catalogued wells are spread across 6 states: Arkansas (56), Louisiana (19), Utah (19), Montana (14) and Wyoming (6) and 1 more. Its 56 Arkansas wells are 0.2% of the 33,791 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 Diamond Shamrock’s wells are active, plugged or orphaned?
0% of Diamond Shamrock's catalogued wells are active, 29 percentage points below the national share of 29%. 94% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Diamond Shamrock operate?
By product class, 6 (5%) are oil wells and 73 (63%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Cam 1 Rb Suc;b Duhon 002 in Vermilion, LA at 16,408 ft. The wells listed below sit in Vermilion (LA), Iberia (LA), Plaquemines (LA), Richland (MT) and Roosevelt (MT). State filings spell the name 3 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Diamond Shamrock
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Cam 1 Rb Suc;b Duhon 002 | 17-113-20808 | Plugged & abandoned | Gas | Vermilion, LA | Diamond Shamrock Corporation | 16,408 ft |
| Peterman 001 | 17-045-20288 | Plugged & abandoned | Other type | Iberia, LA | Diamond Shamrock Corporation | 16,100 ft |
| Cam 1 Rb Sua;d J Vincent 001 | 17-113-20686 | Plugged & abandoned | Gas | Vermilion, LA | Diamond Shamrock Corporation | 16,006 ft |
| Cam 1 Rb Sub;m L Broussard 001 | 17-113-20738 | Plugged & abandoned | Other type | Vermilion, LA | Diamond Shamrock Corporation | 16,005 ft |
| Cam 1 Rb Suc;b Duhon 001 | 17-113-20762 | Plugged & abandoned | Other type | Vermilion, LA | Diamond Shamrock Corporation | 14,345 ft |
| Sl 8688 001 | 17-725-20280 | Plugged & abandoned | Other type | Plaquemines, LA | Diamond Shamrock Corporation | 14,047 ft |
| Sjostrom 33-17 | 25-083-21709 | Plugged & abandoned | Other type | Richland, MT | Diamond Shamrock Corporation | 12,800 ft |
| Sl 8698 001 | 17-721-20355 | Plugged & abandoned | Other type | Plaquemines, LA | Diamond Shamrock Corporation | 12,751 ft |
| Lavern 21-27 | 25-085-21413 | Plugged & abandoned | Other type | Roosevelt, MT | Diamond Shamrock Corporation | 12,635 ft |
| Roedeske Fee 34-1 | 25-083-21367 | Plugged & abandoned | Other type | Richland, MT | Diamond Shamrock Corporation | 12,550 ft |
| State 13-16 | 25-083-21444 | Plugged & abandoned | Other type | Richland, MT | Diamond Shamrock Corporation | 12,542 ft |
| Hill Fee 21-12 | 25-083-21300 | Plugged & abandoned | Other type | Richland, MT | Diamond Shamrock Corporation | 12,416 ft |
Deepest first where depth is published. See all 115 wells →
Frequently asked questions
How many wells does Diamond Shamrock operate?
Diamond Shamrock is the operator of record for 115 catalogued oil & gas wells, with the largest concentration in Arkansas (56). Only wells in states WellCensus has ingested are counted.
How many of Diamond Shamrock's wells are still active?
0 of Diamond Shamrock's catalogued wells are active; 108 are plugged & abandoned.
In which states does Diamond Shamrock operate wells?
Diamond Shamrock is the operator of record for wells in Arkansas (56), Louisiana (19), Utah (19), Montana (14), Wyoming (6) and West Virginia (1).
Does Diamond Shamrock operate mostly oil or gas wells?
6 of Diamond Shamrock's catalogued wells are oil wells and 73 are gas wells; the rest are injection, service or unclassified wells.
What is Diamond Shamrock's deepest well?
Among wells with a published depth, Cam 1 Rb Suc;b Duhon 002 in Vermilion, LA is the deepest at 16,408 ft.
Where Diamond Shamrock's wells are
- Oil & gas wells in Arkansas· 56 operated by Diamond Shamrock
- Oil & gas wells in Louisiana· 19 operated by Diamond Shamrock
- Oil & gas wells in Utah· 19 operated by Diamond Shamrock
- Oil & gas wells in Montana· 14 operated by Diamond Shamrock
- Oil & gas wells in Wyoming· 6 operated by Diamond Shamrock
- Oil & gas wells in West Virginia· 1 operated by Diamond Shamrock
- Largest U.S. well operators
- All well operators
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, “Diamond Shamrock — well portfolio”, https://wellcensus.com/operators/diamond-shamrock-36067 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).