Gary Williams 10-3 Cottonwood
API 4004720171 · Fall River County, South Dakota · Wildcat field
Plugged and AbandonedOil
API
4004720171
Operator
Gary Williams Oil Producer Inc.
County
Fall River
Field
Wildcat
Location
Permit
1307
Formation tops
South Dakota records 14 formations for this well, shallowest first.
| Formation | Top (ft) | Age |
|---|---|---|
| Greenhorn Limestone | 925 | Cretaceous |
| Dakota Mud | 1,615 | Cretaceous |
| Lakota Formation | 1,880 | Cretaceous |
| Morrison Formation | 2,020 | Jurassic |
| Sundance Formation | 2,220 | Triassic |
| Spearfish Formation | 2,512 | Triassic/Permian |
| Minnekahta Limestone | 2,890 | Permian |
| Opeche Shale | 2,935 | Permian |
| Minnelusa Formation | 3,068 | Permian/Pennsylvanian |
| Converse Sand, Minnelusa Formation | 3,367 | Permian |
| Red Marker, Minnelusa Formation | 3,453 | Permian/Pennsylvanian |
| 1st Leo Sandstone, Minnelusa Formation | 3,480 | Pennsylvanian |
| 2nd Leo Sandstone, Minnelusa Formation | 3,625 | Pennsylvanian |
| 3rd Leo Sandstone, Minnelusa Formation | 3,714 | 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 AbandonedOilSpudded
1984-05-15
Completed
1984-06-23
Measured depth
3,900 ft
True vertical depth
3,900 ft
Interval
| Formation | Perforated (ft) |
|---|---|
| Converse Sand, Minnelusa Formation | 3,366–3,370 |
Location
43.027445, -103.987154
43.02745, -103.98715 · Surface location as filed with South Dakota⌘ or Ctrl + scroll to zoom
Every well in Fall River County, South Dakota
South Dakota state record, from SD_wells_SDOILexport_Export__wells_Table_4_Web.parquet. Corpus built 2026-09-11.