160 wells on file. Open this county on the map.
Depth range is measured from the wells on file, not a regional average.
| Formation | Wells | Producing | Shallowest | Average | Deepest | Cumulative |
|---|---|---|---|---|---|---|
| Viola Limestone | 22 | 0 | 2,530 ft | 3,268 ft | 3,499 ft | — |
| Arbuckle Group | 15 | 0 | 2,972 ft | 3,461 ft | 3,787 ft | — |
| Simpson Group Lower | 12 | 0 | 2,662 ft | 3,422 ft | 3,754 ft | — |
| Hunton Group | 11 | 0 | 2,530 ft | 2,787 ft | 2,980 ft | — |
| Cherokee Group Coal | 9 | 0 | 2,118 ft | 2,236 ft | 2,290 ft | — |
| Simpson | 8 | 4 | 3,470 ft | 3,596 ft | 3,675 ft | — |
| Cherokee | 6 | 0 | 2,330 ft | 2,390 ft | 2,420 ft | — |
| Viola | 6 | 0 | 2,990 ft | 3,404 ft | 3,618 ft | — |
| Viol | 5 | 0 | 2,659 ft | 3,131 ft | 3,450 ft | — |
| Precambrian System | 5 | 0 | 3,379 ft | 3,530 ft | 3,720 ft | — |
| Ordovician System | 4 | 0 | 3,200 ft | 3,534 ft | 3,992 ft | — |
| Arbuckle | 4 | 0 | 3,050 ft | 3,295 ft | 3,636 ft | — |
| Hntn | 4 | 0 | 2,751 ft | 3,056 ft | 3,370 ft | — |
| Mississippian | 3 | 0 | 2,113 ft | 2,702 ft | 3,625 ft | — |
| Hunton | 2 | 1 | 3,433 ft | 3,447 ft | 3,460 ft | — |
| Pennsylvanian System | 1 | 0 | 2,740 ft | 2,740 ft | 2,740 ft | — |
| Reagan Sandstone | 1 | 0 | 3,636 ft | 3,636 ft | 3,636 ft | — |
| Maquoketa Shale | 1 | 0 | 3,180 ft | 3,180 ft | 3,180 ft | — |
| St Peter | 1 | 0 | 3,540 ft | 3,540 ft | 3,540 ft | — |
| Devonian System | 1 | 0 | 2,359 ft | 2,359 ft | 2,359 ft | — |
| Cambrian System | 1 | 0 | 3,837 ft | 3,837 ft | 3,837 ft | — |
| Viola, Simpson | 1 | 0 | 3,684 ft | 3,684 ft | 3,684 ft | — |
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