O'BRYAN-SEVEN SISTERS 1
API 15207249310000 · Woodson County, Kansas · UNKNOWN field
Plugged and AbandonedPlugged 1984-07-31
API
15207249310000
Operator
Billy Oil, Inc.
County
Woodson
Field
UNKNOWN
Location
Permit
02-JUL-1984
Spudded
1984-07-03
Completed
1984-07-20
Plugged
1984-07-31
Measured depth
1,309 ft
Formation tops
Kansas records 20 formations for this well, shallowest first.
| Formation | Top (ft) | Base (ft) | Picks |
|---|---|---|---|
| Winterset Limestone Member | 545 | — | 1 |
| Stark Shale Member | 612 | — | 1 |
| Canville Limestone Member | 618 | 623 | 1 |
| Mound Valley Limestone Formation | 630 | 632 | 1 |
| Bethany Falls Limestone Member | 634 | — | 1 |
| Hushpuckney Shale Member | 651 | — | 1 |
| Middle Creek Limestone Member | 655 | 663 | 1 |
| Mound City Shale Member | — | 691 | 1 |
| Critzer Limestone Member | — | 710 | 1 |
| Exline Limestone Member | — | 778 | 1 |
| Nuyaka Creek Black Shale Bed | — | 798 | 1 |
| Little Osage Shale Member | 1,006 | — | 1 |
| Summit Coal Bed | 1,010 | 1,010 | 1 |
| Blackjack Creek Limestone Member | 1,012 | — | 1 |
| Excello Shale Member | 1,018–1,022 | — | 2 |
| Mulky Coal Bed | 1,022 | 1,023 | 1 |
| Bevier Coal Bed | 1,089 | 1,091 | 1 |
| Verdigris Limestone Member | 1,105 | — | 1 |
| VSHALE | 1,107 | — | 1 |
| Croweburg Coal Bed | 1,112 | 1,113 | 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. 1 formation was picked at more than one depth by different Kansas sources, and its range is shown rather than one of the answers.
Location
37.756839, -95.762979
37.75684, -95.76298 · Surface location as filed with Kansas⌘ or Ctrl + scroll to zoom
Every well in Woodson County, Kansas
Kansas state record, from KS_wells_ks_wells.parquet. Corpus built 2026-09-11.