WYOMING · WELLS · BIG HORN COUNTY · API 49-003-20303
Alkali Anti W-1390A 11
ActiveVertical oil wellWOGCC status: Producing Oil Well
- Operator of record
- Rim Operating Inc
- Permitted by
- Costilla Energy Inc
- County
- Big Horn
- Field
- Alkali Anticline
A vertical oil well in Big Horn County, Wyoming, operated by Rim Operating Inc. WOGCC status: producing oil well.
Spudded May 23, 1974.
Completed in 2 fields: Alkali Anticline, Alkali Anticline.
It has reported 321,258 bbl of oil, 31,888 Mcf of gas, and 933,527 bbl of water since the record begins in January 1978; in the twelve months through August 2026, 2,094 bbl, 0 Mcf, and 7,729 bbl.
- 2,094
- bbl oil, 12 months through Aug 2026
- 0
- Mcf gas, same 12 months
- 7,729
- bbl produced water, same 12 months
- 321,258
- bbl oil since Jan 1978 · 31,888 Mcf gas
- Status
- Approved · WOGCC: Drilling or Drilled Permit
- Approved
- May 20, 1974
- Operator
- Costilla Energy Inc
- Proposed formation
- Phosphoria
- Target depth
- 5,954 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 2,094 · prior 12 2,651(-21%)
Alkali Anti W-1390A 11: Oil by month.
Completions
ONE PER RESERVOIR THE WELL IS COMPLETED IN
| Field | Status | Perforations, ft | Completed | Produced | Oil, bbl | Gas, Mcf | Water, bbl |
|---|---|---|---|---|---|---|---|
| Alkali AnticlinePhosphoria-Tensleep | Active | — | — | by Jan 1978 to Sep 2026 | 321,258 | 31,888 | 933,527 |
| Alkali AnticlinePhosphoria | — | — | Jul 15, 1974 | — | — | — | — |
Formation tops
Download CSV →9 tops as filed, by depth. A formation filed more than once is listed each time.
| Formation | Depth |
|---|---|
| FRONTIER | 2,210 ft |
| PEAY | 2,840 ft |
| MUDDY | 3,462 ft |
| MORRISON | 3,932 ft |
| DINWOODY | 5,318 ft |
| PHOSPHORIA | 5,348 ft |
| TENSLEEP | 5,537 ft |
| DARWIN | 5,746 ft |
| MADISON | 5,779 ft |
Source: Wyoming Oil and Gas Conservation Commission, "Geological Markers Based On Form 3"
Formation tops nearby
Operators of record
| Operator | From | To |
|---|---|---|
| Rim Operating Inc | Oct 1, 2013 | today |
| Prima Exploration Inc | Jan 1, 2000 | Oct 1, 2013 |
Well record
- API number
- 49-003-20303
- Location
- SE SW 29-55N-95W · 1200 FSL, 1850 FWL
- Coordinates
- 44.71215, -108.32240 ↗
- Elevation
- 4,615 ft GR
- Total depth
- 5,954 ft
- Land
- Federal
- Basin, as WOGCC files it
- Bighorn Basin
- APD
- Approved May 20, 1974
- Proposed formation
- Phosphoria
- Target depth
- 5,954 ft
- Spudded
- May 23, 1974
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/4900320303, documented in the API reference.