True 1 Knox Government
API 4010305018 · Pennington County, South Dakota · Wildcat field
Plugged and AbandonedDry Hole-Oil show
API
4010305018
Operator
True Oil Co.
County
Pennington
Field
Wildcat
Location
NWNW Sec 29 Twp 005N Rng 17E
Permit
171
Formation tops
South Dakota records 17 formations for this well, shallowest first.
| Formation | Top (ft) | Age |
|---|---|---|
| Niobrara Formation | 1,605 | Cretaceous |
| Carlile Shale | 1,714 | Cretaceous |
| Greenhorn Limestone | 2,027 | Cretaceous |
| Graneros | 2,206 | Cretaceous |
| Newcastle Sandstone | 2,537 | Cretaceous |
| Skull Creek Shale | 2,698 | Cretaceous |
| Inyan Kara Group | 2,747 | Cretaceous |
| Morrison Formation | 3,006 | Jurassic |
| Sundance Formation | 3,047 | Jurassic |
| Minnekahta Limestone | 3,418 | Permian |
| Opeche Shale | 3,456 | Permian |
| Minnelusa Formation | 3,500 | Permian/Pennsylvanian |
| Madison Group | 4,258 | Mississippian |
| Devonian undifferentiated | 4,794 | Devonian |
| Red River Formation | 4,950 | Ordovician |
| Winnipeg Formation | 5,362 | Ordovician |
| Deadwood Formation | 5,440 | Ordovician/Cambrian |
A dash is a formation South Dakota records for this well without a depth.
Completion
South Dakota files 1 completion report for this well.
Vertical Well
Plugged and AbandonedDry Hole-Oil showSpudded
1955-11-26
Measured depth
5,575 ft
True vertical depth
5,575 ft
Location
44.370703, -102.099257
44.37070, -102.09926 · Surface location as filed with South Dakota⌘ or Ctrl + scroll to zoom
Every well in Pennington County, South Dakota
South Dakota state record, from SD_wells_SDOILexport_Export__wells_Table_4_Web.parquet. Corpus built 2026-09-11.