CLIFF Field Activity and Well Summary
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Total wells
Drill activity
The CLIFF oil & gas field in Colorado contains 46 wells on file.
Top operators: MONAHAN* REX FAMILY TRUST, SINCLAIR OIL & GAS COMPANY, and others.
Most recent well: UPRR-AYRES, operated by ROUNDS CO* DON M — last updated March 2026.
CLIFF field coverage
Counties the CLIFF field intersects.
Recent wells
| Well Name | County | Last activity | Updates | Operator | API |
|---|---|---|---|---|---|
| UPRR-AYRES | Logan | 2026-03-18 | ROUNDS CO* DON M | 05-075-07258 | |
| UPRR-CASEMENT | Logan | 2026-03-18 | T & T OIL COMPANY, UPRR, ET AL | 05-075-07205 | |
| CASEMENT 'C' | Logan | 2026-03-18 | BRITISH AMERICAN OIL PROD CO | 05-075-07215 | |
| H.S. AYRES | Logan | 2026-03-18 | SINCLAIR OIL & GAS COMPANY | 05-075-07245 | |
| AYRES | Logan | 2026-03-18 | EXETER DRILLING CO | 05-075-07313 | |
| HISCOCK | Logan | 2026-03-18 | UNION TEXAS PETROLEUM | 05-075-07219 | |
| UPRR-AYRES | Logan | 2026-03-18 | ROUNDS CO* DON M | 05-075-07244 | |
| RICE | Logan | 2026-03-18 | ANDERSON-PRICHARD OIL CORP | 05-075-07230 | |
| L HISCOCK | Logan | 2026-03-18 | SINCLAIR OIL & GAS COMPANY | 05-075-07220 | |
| CASEMENT 'A' | Logan | 2026-03-18 | BRITISH AMERICAN OIL PROD CO | 05-075-07206 |
Top Operators in the CLIFF field by total wells
Operators: Monahan* Rex Family Trust, Sinclair Oil & Gas Company, British American Oil Prod Co, Rounds Co* Don M, Mccartney Engineering Llc, Brown Oil & Gas Llc, Union Texas Petroleum, Anderson-Prichard Oil Corp, Snowden Oil Co, T & T Oil Company, Uprr, Et Al.
Other Major Fields in Colorado most active by total wells
Compare the CLIFF field against the other busiest oil and gas fields in Colorado:
- Wattenberg · 34,564 wells
- Wildcat · 23,158 wells
- Grand Valley · 6,168 wells
- Ignacio Blanco · 4,356 wells
- Mamm Creek · 3,675 wells
- Purgatoire River · 3,636 wells
- Rulison · 2,806 wells
- Parachute · 2,530 wells
- Rangely · 2,419 wells
- Spindle · 2,041 wells