Gary 1 O'Neill
API 4003305048 · Custer County, South Dakota · Wildcat field
Plugged and AbandonedDry Hole
API
4003305048
Operator
S. Gary
County
Custer
Field
Wildcat
Location
SWNW Sec 23 Twp 003S Rng 11E
Permit
236
Formation tops
South Dakota records 8 formations for this well, shallowest first.
| Formation | Top (ft) | Age |
|---|---|---|
| Niobrara Formation | 872 | Cretaceous |
| Carlile Shale | 1,230 | Cretaceous |
| Greenhorn Limestone | 1,656 | Cretaceous |
| Graneros | 1,693 | Cretaceous |
| Mowry Shale | 2,051 | Cretaceous |
| Newcastle Sandstone | 2,194 | Cretaceous |
| Skull Creek Shale | 2,314 | Cretaceous |
| Fall River Sandstone | 2,510 | Cretaceous |
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 HoleSpudded
1957-09-12
Measured depth
2,565 ft
True vertical depth
2,565 ft
Location
43.775819, -102.776759
43.77582, -102.77676 · 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.