FIELDS · WYOMING · FIELD fb76153b171
Semlek
Field · Crook County
- 2
- active completions of 41 · 2 operators today
- 24,599
- bbl oil, 12 months through Aug 2026 · +24%
- 0
- Mcf gas, same 12 months
- 3.3M
- bbl oil since the record begins, Jan 1978 · 0 Mcf gas
Every well completed in it, searchable → · Median top perforation 7,020 ft
Reported production by month
12 months through Aug 2026 24,599 · prior 12 19,817(+24%)
Semlek: Oil by month.
Operators
| Operator | Active | Oil, 12 mo | Gas, 12 mo |
|---|---|---|---|
| Cardinal Wyoming LLC | 1 | 18,314 | 0 |
| Citation Oil & Gas Corporation | 1 | 6,285 | 0 |
| St Michael Exploration | 0 | 0 | 0 |
| Texaco Exploration & Prod | 0 | 0 | 0 |
| Ballard Petroleum Holdings LLC | 0 | 0 | 0 |
| MKM Exploration | 0 | — | — |
| Lario Oil & Gas Company | 0 | — | — |
| Texas American Oil Corporation | 0 | — | — |
| Anschutz Corporation | 0 | — | — |
| Stuarco Oil Company Inc | 0 | — | — |
| Matrix Exploration | 0 | — | — |
| Davis Oil Company | 0 | — | — |
| TXO Production Corporation | 0 | — | — |
| Gary-Williams Production Company | 0 | — | — |
| Amax Petroleum Corp | 0 | — | — |
Counties
- Crook County2 active of 41
Largest completions
OIL, THEN GAS · 12 MONTHS THROUGH AUG 2026
| Well | Operator | County | Completed | Top perf, ft | Oil, 12 mo | Gas, 12 mo |
|---|---|---|---|---|---|---|
| Semlek Unit W1W 1 | Cardinal Wyoming LLC | Crook | — | 7,035 | 18,314 | 0 |
| Heath W-019284 1 | Citation Oil & Gas Corporation | Crook | Sep 9, 1963 | — | 6,285 | 0 |
Latest completions
BY COMPLETION DATE
| Well | Operator | County | Completed | Top perf, ft | Oil, 12 mo | Gas, 12 mo |
|---|---|---|---|---|---|---|
| Semlek Unit W1W 1 | Cardinal Wyoming LLC | Crook | Feb 21, 2019 | — | — | — |
| Cassandra-W-83487 26-5 | Lasmo Energy Corporation | Crook | Jan 9, 1988 | — | — | — |
| Mellott 1 Fee 14-26 | Southwestern Energy Prod Co | Crook | Aug 29, 1986 | — | — | — |
| Semlek Fee 11-34 | Puma Petroleum I | Crook | Dec 3, 1985 | — | — | — |
| Wyoming State 1 | TXO Production Corporation | Crook | Jul 15, 1985 | — | — | — |
| Federal W-019284B 21-5 | Citation Oil & Gas Corporation | Crook | Sep 28, 1984 | — | 0 | 0 |
| Tope 2 | Davis Oil Company | Crook | Dec 2, 1983 | — | — | — |
| Semlek-Federal 2 | Davis Oil Company | Crook | Oct 30, 1983 | — | — | — |
| Hanaway 1 | Lario Oil & Gas Company | Crook | Apr 1, 1983 | — | — | — |
| Federal 1-29 | Matrix Exploration | Crook | Dec 8, 1982 | — | — | — |
About this data
Wyoming Oil and Gas Conservation Commission's field registry, its well completions, and the volumes operators filed against the field on form 2, through Aug 2026. The Commission's production file names each well's current operator on every month, so an operator's figures are those of the wells it operates today. Nothing is estimated.
Developers: this page as JSON is GET /v1/data/fields/wy/fb76153b171, documented in the API reference.