WYOMING · WELLS · CARBON COUNTY · API 49-007-21665
Sierra Madre 12-20
ActiveVertical oil wellWOGCC status: Producing Oil Well
- Operator of record
- Teocali Energy LLC
- Permitted by
- Vessels Oil & Gas Company
- County
- Carbon
- Field
- Sierra Madre
A vertical oil well in Carbon County, Wyoming, operated by Teocali Energy LLC. WOGCC status: producing oil well.
Spudded January 24, 1998 and drilled to 5,400 ft measured depth.
Completed in one field: Sierra Madre.
It has reported 524,070 bbl of oil, 447,448 Mcf of gas, and 13,119 bbl of water since February 1998; in the twelve months through August 2026, 9,600 bbl, 7,051 Mcf, and 722 bbl.
- 9,600
- bbl oil, 12 months through Aug 2026
- 7,051
- Mcf gas, same 12 months
- 722
- bbl produced water, same 12 months
- 524,070
- bbl oil since Feb 1998 · 447,448 Mcf gas
- Status
- Approved · WOGCC: Drilling or Drilled Permit
- Approved
- Jan 21, 1998
- Operator
- Vessels Oil & Gas Company
- Proposed formation
- Niobrara
- Target depth
- 5,400 ft
Wells nearby
Every well with a location on file around this well, in any state, nearest first.
Reported production
Every month on file for this well on form 2, summed across its fields and the operators that filed it. The newest months can still be amended.
12 months through Aug 2026 9,600 · prior 12 10,048(-4%)
Sierra Madre 12-20: Oil by month.
Completions
ONE PER RESERVOIR THE WELL IS COMPLETED IN
| Field | Status | Perforations, ft | Completed | Produced | Oil, bbl | Gas, Mcf | Water, bbl |
|---|---|---|---|---|---|---|---|
| Sierra MadreNiobrara | Active | 4,420 to 5,400 MD | Feb 6, 1998 | Feb 1998 to Aug 2026 | 524,070 | 447,448 | 13,119 |
Formation tops
Download CSV →11 tops as filed, by depth. A formation filed more than once is listed each time.
| Formation | Depth |
|---|---|
| MESAVERDE | 322 ft |
| HATFIELD SANDS | 911 ft |
| CHEROKEE CREEK SAND | 1,474 ft |
| DEEP CREEK SAND | 1,639 ft |
| COW CREEK SAND | 2,184 ft |
| SUSSEX SAND | 3,112 ft |
| SHANNON SAND | 3,510 ft |
| SHANNON SAND BASE | 3,601 ft |
| NIOBRARA | 4,542 ft |
| FIRST CHALK | 4,595 ft |
| SECOND CHALK | 5,149 ft |
Source: Wyoming Oil and Gas Conservation Commission, "Geological Markers Based On Form 3"
Formation tops nearby
Operators of record
| Operator | From | To |
|---|---|---|
| Encore Energy Partners Operating LLC | Dec 3, 2012 | today |
| Anadarko E&P Company LP | Dec 11, 2004 | Dec 3, 2012 |
| Merit Energy Company | Jan 1, 2000 | Dec 11, 2004 |
Well record
- API number
- 49-007-21665
- Location
- NW SW 20-13N-89W · 1980 FSL, 665 FWL
- Coordinates
- 41.07979, -107.43796 ↗
- Elevation
- 6,957 ft
- Measured depth
- 5,400 ft
- Total depth
- 5,400 ft
- Perforations
- 4,420 to 5,400 ft
- Land
- Private
- Basin, as WOGCC files it
- Greater Green River Basin
- APD
- Approved Jan 21, 1998
- Proposed formation
- Niobrara
- Target depth
- 5,400 ft
- Spudded
- Jan 24, 1998
About this data
Wyoming Oil and Gas Conservation Commission (WOGCC), from its public database extracts. Status and type are in WOGCC's own words. Production and injection are what operators filed on form 2, by well and month; twelve-month figures end in Aug 2026, the last month whose filings are in. Locations are from the well's location plat and are approximate. 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/wells/4900721665, documented in the API reference.