SEMLEK Field Activity and Well Summary
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Total wells
Drill activity
The SEMLEK oil & gas field in Wyoming contains 44 wells on file.
Top operators: TEXACO EXPLORATION & PROD, CARDINAL WYOMING LLC, and others.
Most recent well: 12-27, operated by SLAWSON EXPLORATION COMPANY INC — last updated March 2026.
SEMLEK field coverage
Counties the SEMLEK field intersects.
Recent wells
| Well Name | County | Last activity | Updates | Operator | API |
|---|---|---|---|---|---|
| 12-27 | Crook | 2026-03-18 | SLAWSON EXPLORATION COMPANY INC | 1123025 | |
| SEMLEK #1 | Crook | 2019-02-21 | CARDINAL WYOMING LLC | 1123367 | |
| 26-5 | Crook | 1987-12-28 | LASMO ENERGY CORPORATION | 1122162 | |
| 14-26 | Crook | 1986-08-18 | SOUTHWESTERN ENERGY PROD CO | 1122018 | |
| SEMLEK #1 | Crook | 1985-06-29 | TXO PRODUCTION CORPORATION | 1121833 | |
| 11-34 | Crook | 1985-06-15 | PUMA PETROLEUM I | 1121796 | |
| 21-5 | Crook | 1984-08-01 | CITATION OIL & GAS CORPORATION | 1121565 | |
| SEMLEK #2 | Crook | 1983-11-18 | DAVIS OIL COMPANY | 1121394 | |
| SEMLEK #2 | Crook | 1983-10-15 | DAVIS OIL COMPANY | 1121331 | |
| SEMLEK #1 | Crook | 1983-05-14 | LARIO OIL & GAS COMPANY | 1121244 |
Top Operators in the SEMLEK field by total wells
Operators: Texaco Exploration & Prod, Cardinal Wyoming Llc, Amax Petroleum Corp, Dreiling Ltd, Davis Oil Company, Citation Oil & Gas Corporation, Mkm Exploration, Cardinal Petroleum Company, Carbide International, Atlantic Richfield Company.
Other Major Fields in Wyoming most active by total wells
Compare the SEMLEK field against the other busiest oil and gas fields in Wyoming:
- Wc · 76,411 wells
- Prb Coal Bed · 46,479 wells
- Pinedale · 5,251 wells
- Salt Creek · 4,822 wells
- Jonah · 3,451 wells
- Osage · 2,266 wells
- Crossbow · 1,471 wells
- Siberia Ridge · 1,453 wells
- Teapot Naval Reserve · 1,424 wells
- Echo Springs · 1,063 wells