Benedum 1 Kaiser Ranch
API 4003320003 · Custer County, South Dakota · Wildcat field
Plugged and AbandonedDry Hole-Oil and Gas show
API
4003320003
Operator
P. G. Benedum Jr.
County
Custer
Field
Wildcat
Location
Permit
660
Formation tops
South Dakota records 14 formations for this well, shallowest first.
| Formation | Top (ft) | Age |
|---|---|---|
| Niobrara Formation | 627 | Cretaceous |
| Greenhorn Limestone | 1,584 | Cretaceous |
| Belle Fourche Shale | 1,620 | Cretaceous |
| Mowry Shale | 1,960 | Cretaceous |
| Dakota Mud | 2,116 | Cretaceous |
| Skull Creek Shale | 2,208 | Cretaceous |
| Fall River Sandstone | 2,401 | Cretaceous |
| Lakota Formation | 2,508 | Cretaceous |
| Morrison Formation | 2,909 | Jurassic |
| Sundance Formation | 3,129 | Triassic |
| Spearfish Formation | 3,288 | Triassic/Permian |
| Minnekahta Limestone | 3,639 | Permian |
| Opeche Shale | 3,680 | Permian |
| Minnelusa Formation | 3,863 | Permian/Pennsylvanian |
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 and Gas showSpudded
1972-07-01
Measured depth
4,132 ft
True vertical depth
4,132 ft
Location
43.725164, -102.902259
43.72516, -102.90226 · Surface location as filed with South Dakota⌘ or Ctrl + scroll to zoom
Every well in Custer County, South Dakota
South Dakota state record, from SD_wells_SDOILexport_Export__wells_Table_4_Web.parquet. Corpus built 2026-09-11.