Diamond Shamrock Exploration
Operator of record for 48 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: DIAMOND SHAMROCK EXPLORATION CO. · Diamond Shamrock Exploration Co
At a glance
Diamond Shamrock Exploration is the operator of record for 48 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 31 (65%) are plugged & abandoned. Its largest concentration is in North Dakota, with 41 wells (85% of its portfolio).
Wells operated
48
Active
0
Plugged
31
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| North Dakota | 41 |
| Arkansas | 7 |
Well mix
- Oil wells
- 42
- Gas wells
- 6
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Diamond Shamrock Exploration operate?
Diamond Shamrock Exploration's catalogued wells are spread across 2 states: North Dakota (41) and Arkansas (7). Its 41 North Dakota wells are 0.1% of the 43,680 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 Exploration’s wells are active, plugged or orphaned?
0% of Diamond Shamrock Exploration's catalogued wells are active, 29 percentage points below the national share of 29%. 65% 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 Exploration operate?
By product class, 42 (88%) are oil wells and 6 (13%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Dsec Clemets-Olson 41-8 in Dunn, ND at 14,400 ft. The wells listed below sit in Dunn (ND), Mckenzie (ND), Williams (ND), Divide (ND), Golden Valley (ND) and Hettinger (ND) and other counties. State filings spell the name 2 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Diamond Shamrock Exploration
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Dsec Clemets-Olson 41-8 | 33-025-00407 | Plugged & abandoned | Oil | Dunn, ND | Diamond Shamrock Exploration Co. | 14,400 ft |
| Cimarron Fee 22-19 | 33-053-01492 | Plugged & abandoned | Oil | Mckenzie, ND | Diamond Shamrock Exploration Co. | 14,315 ft |
| Dsec Clements-Rase 21-7 | 33-053-01935 | Plugged & abandoned | Oil | Mckenzie, ND | Diamond Shamrock Exploration Co. | 13,900 ft |
| Smith 24-31 | 33-105-00996 | Plugged & abandoned | Oil | Williams, ND | Diamond Shamrock Exploration Co. | 13,500 ft |
| Evenson Fee 22-28 | 33-023-00338 | Plugged & abandoned | Oil | Divide, ND | Diamond Shamrock Exploration Co. | 12,604 ft |
| Gpe-Bn 34-5 | 33-033-00086 | Plugged & abandoned | Oil | Golden Valley, ND | Diamond Shamrock Exploration Co. | 11,722 ft |
| Dsec Clements-Boehm 34-24 | 33-053-01934 | Plugged & abandoned | Oil | Mckenzie, ND | Diamond Shamrock Exploration Co. | 10,410 ft |
| Dsec Clements-Hovden 13-15 | 33-025-00402 | Plugged & abandoned | Oil | Dunn, ND | Diamond Shamrock Exploration Co. | 10,250 ft |
| Ronald Federal 31-31 | 33-053-01964 | Plugged & abandoned | Oil | Mckenzie, ND | Diamond Shamrock Exploration Co. | 10,200 ft |
| Blickendorf 24-22 | 33-041-00018 | Plugged & abandoned | Oil | Hettinger, ND | Diamond Shamrock Exploration Co. | 9,975 ft |
| Federal 1-30 | 33-007-00180 | Plugged & abandoned | Oil | Billings, ND | Diamond Shamrock Exploration Co. | 9,581 ft |
| Cenex Long Federal 41-25 | 33-033-00177 | Plugged & abandoned | Oil | Golden Valley, ND | Diamond Shamrock Exploration Co. | 9,573 ft |
Deepest first where depth is published. See all 48 wells →
Frequently asked questions
How many wells does Diamond Shamrock Exploration operate?
Diamond Shamrock Exploration is the operator of record for 48 catalogued oil & gas wells, with the largest concentration in North Dakota (41). Only wells in states WellCensus has ingested are counted.
How many of Diamond Shamrock Exploration's wells are still active?
0 of Diamond Shamrock Exploration's catalogued wells are active; 31 are plugged & abandoned.
In which states does Diamond Shamrock Exploration operate wells?
Diamond Shamrock Exploration is the operator of record for wells in North Dakota (41) and Arkansas (7).
Does Diamond Shamrock Exploration operate mostly oil or gas wells?
42 of Diamond Shamrock Exploration's catalogued wells are oil wells and 6 are gas wells; the rest are injection, service or unclassified wells.
What is Diamond Shamrock Exploration's deepest well?
Among wells with a published depth, Dsec Clemets-Olson 41-8 in Dunn, ND is the deepest at 14,400 ft.
Where Diamond Shamrock Exploration'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, “Diamond Shamrock Exploration — well portfolio”, https://wellcensus.com/operators/diamond-shamrock-exploration-12059 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).