Cotton 'A' 2
API 15175208800001 · Seward County, Kansas · SHAMROCK field
Plugged and AbandonedPlugged 1995-06-15
API
15175208800001
Operator
OXY USA Inc.
County
Seward
Field
SHAMROCK
Location
Spudded
1992-03-12
Completed
1992-03-12
Plugged
1995-06-15
Measured depth
5,650 ft
Formation tops
Kansas records 74 formations for this well, shallowest first.
| Formation | Top (ft) | Base (ft) | Picks |
|---|---|---|---|
| Stone Corral Formation | 1,658 | 1,716 | 1 |
| Wellington Formation | 2,200 | — | 1 |
| Hutchinson Salt Member | 2,360 | 2,620 | 3 |
| Hollenberg Limestone Member | 2,628 | — | 1 |
| Chase Group | 2,652 | — | 1 |
| Herington Limestone Member | 2,652 | — | 4 |
| Paddock Shale Member | 2,668 | — | 1 |
| Krider Limestone Member | 2,672 | — | 1 |
| Odell Shale Formation | 2,720 | — | 1 |
| Winfield Limestone Formation | 2,734 | — | 4 |
| Gage Shale Member | 2,766 | — | 1 |
| Towanda Limestone Member | 2,786 | 2,838 | 1 |
| Fort Riley Limestone Member | 2,850 | 2,906 | 1 |
| Matfield Shale Formation | 2,926 | — | 1 |
| Wreford Limestone Formation | 2,940 | — | 1 |
| Council Grove Group | 2,972–2,974 | — | 4 |
| Speiser Shale Formation | 2,974 | — | 1 |
| Funston Formation | 2,982 | — | 1 |
| Blue Rapids Shale Formation | 3,027 | — | 1 |
| Crouse Limestone Formation | 3,037 | — | 1 |
| Easly Creek Shale Formation | 3,056 | — | 1 |
| Middleburg Limestone Member | 3,061 | — | 1 |
| Hooser Shale Member | 3,073 | — | 1 |
| Eiss Limestone Member | 3,083 | — | 1 |
| Stearns Shale Formation | 3,094 | — | 1 |
| Morrill Limestone Member | 3,100 | — | 1 |
| Florena Shale Member | 3,120 | — | 1 |
| Cottonwood Limestone Member | 3,126 | — | 1 |
| Eskridge Shale Formation | 3,154 | — | 1 |
| Neva Limestone Member | 3,175 | — | 1 |
| Roca Shale Formation | 3,236 | — | 1 |
| Howe Limestone Member | 3,242 | — | 1 |
| Johnson Shale Formation | 3,275 | — | 1 |
| Long Creek Limestone Member | 3,278 | — | 1 |
| Janesville Shale Formation | 3,312 | — | 1 |
| Falls City Limestone Formation | 3,336 | — | 1 |
| Onaga Shale Formation | 3,343 | — | 1 |
| Wabaunsee Group | 3,357–3,418 | — | 6 |
| Pennsylvanian System | 3,358 | — | 1 |
| Root Shale Formation | 3,492 | — | 1 |
| Stotler Limestone Formation | 3,500 | — | 1 |
| Severy Shale Formation | 3,735 | — | 1 |
| Shawnee Group | 3,739 | — | 1 |
| Topeka Limestone Formation | 3,739 | — | 1 |
| Heebner Shale Member | 4,204 | — | 4 |
| Toronto Limestone Member | 4,224 | — | 4 |
| Iatan Limestone Member | 4,288 | — | 1 |
| Lansing Group | 4,288–4,320 | — | 6 |
| Iola Limestone Formation | 4,525–4,602 | — | 4 |
| Muncie Creek Shale Member | 4,580 | — | 1 |
| Dewey Limestone Formation | 4,593 | — | 1 |
| Stark Shale Member | 4,781 | — | 1 |
| Swope Limestone Formation | 4,802 | — | 4 |
| Hushpuckney Shale Member | 4,835 | — | 1 |
| Hertha Limestone Formation | 4,841–4,842 | — | 4 |
| Mound City Shale Member | 4,863 | — | 1 |
| Exline Limestone Member | 4,866 | — | 1 |
| Pleasanton Group | 4,912 | — | 1 |
| Marmaton Group | 4,922 | — | 5 |
| Novinger Limestone Bed | 4,944 | — | 3 |
| Fort Scott Limestone Formation | 5,060 | — | 4 |
| Cherokee Group | 5,092–5,115 | — | 4 |
| Little Osage Shale Member | 5,092 | — | 1 |
| Excello Shale Member | 5,114–5,115 | — | 4 |
| Atoka Shale Bed | 5,387 | — | 1 |
| Middle Morrowan Limestone Bed | 5,460 | — | 4 |
| Upper Kearny Member | 5,460 | — | 1 |
| Keyes Sandstone Bed | 5,552 | — | 3 |
| Middle Morrowan Sandstone Bed | 5,555 | 5,561 | 2 |
| Mississippian System | 5,566–5,588 | — | 4 |
| Chesteran Stage | 5,588 | — | 1 |
| Chesteran Zone B Bed | 5,588 | — | 4 |
| Chesteran Zone A Bed | — | — | 1 |
| Lower Kearny Member | — | — | 1 |
A dash is a formation Kansas records for this well without a depth. In the base column a dash is also a depth Kansas’s sources record differently from one another. 8 formations were picked at more than one depth by different Kansas sources, and their range is shown rather than one of the answers.
Location
37.299810, -100.846763
37.29981, -100.84676 · Surface location as filed with Kansas⌘ or Ctrl + scroll to zoom
Every well in Seward County, Kansas
Kansas state record, from KS_wells_ks_wells.parquet. Corpus built 2026-09-11.