Investors 1 Brooks
API 4004120014 · Dewey County, South Dakota · Lantry field
Converted-Fresh Water SupplyDry Hole
API
4004120014
Operator
Investors Drilling Ventures Inc.
County
Dewey
Field
Lantry
Location
NESE Sec 06 Twp 012N Rng 22E
Permit
612
Formation tops
South Dakota records 14 formations for this well, shallowest first.
| Formation | Top (ft) | Age |
|---|---|---|
| Niobrara Formation | 1,720 | Cretaceous |
| Greenhorn Limestone | 2,240 | Cretaceous |
| Dakota Mud | 2,750 | Cretaceous |
| Skull Creek Shale | 2,810 | Cretaceous |
| Fall River Sandstone | 2,985 | Cretaceous |
| Morrison Formation | 3,030 | Jurassic |
| Sundance Formation | 3,150 | Triassic |
| Minnelusa Formation | 3,395 | Permian/Pennsylvanian |
| Madison Group | 4,105 | Mississippian |
| Three Forks Shale | 4,762 | Devonian |
| Nisku Formation | 4,850 | Devonian |
| Duperow Formation | 4,903 | Devonian |
| Stony Mountain Formation | 5,040 | Ordovician |
| Red River Formation | 5,098 | Ordovician |
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
Converted-Fresh Water SupplyDry HoleSpudded
1970-12-17
Measured depth
5,200 ft
True vertical depth
5,200 ft
Location
45.029044, -101.484148
45.02904, -101.48415 · Surface location as filed with South Dakota⌘ or Ctrl + scroll to zoom
Every well in Dewey County, South Dakota
South Dakota state record, from SD_wells_SDOILexport_Export__wells_Table_4_Web.parquet. Corpus built 2026-09-11.