The Viola formation
1,051 wells name this formation. The field is recorded on only 21 % of the register, so this is the minority that carries one.
| Measurement | Median | 90th percentile | Kansas median |
|---|---|---|---|
| Total depth | 4292 ft | 6300 ft | 2831 ft — deeper here |
What stands out on the Viola
The operator named on most of these records is Trimble & Maclaskey Oil LLC, on 35 of them (3.3%), ahead of Haas Petroleum, LLC (24) and Vess Oil Corporation (22). The oldest well here was completed in 1941 and the most recent in 2025, and the deepest reaches 8060 feet — Theis 4-18, drilled in 2010.
Where it is produced
| County | Wells | Share |
|---|---|---|
| Comanche | 181 | 17.2% |
| Pratt | 110 | 10.5% |
| Butler | 90 | 8.6% |
| Barber | 82 | 7.8% |
| Stafford | 72 | 6.9% |
| Clark | 70 | 6.7% |
| Lyon | 62 | 5.9% |
| Reno | 45 | 4.3% |
| Chase | 38 | 3.6% |
| Kingman | 36 | 3.4% |
| Pawnee | 33 | 3.1% |
| Greenwood | 32 | 3.0% |
| Wabaunsee | 26 | 2.5% |
| Marion | 24 | 2.3% |
| Morris | 20 | 1.9% |
| Coffey | 15 | 1.4% |
| Woodson | 14 | 1.3% |
| Mcpherson | 13 | 1.2% |
| Nemaha | 13 | 1.2% |
| Kiowa | 11 | 1.0% |
In which fields
| Field | Wells | Share |
|---|---|---|
| Wildcat | 102 | 9.7% |
| Unnamed | 45 | 4.3% |
| El Dorado | 40 | 3.8% |
| Bradfield | 32 | 3.0% |
| Zenith-peace Creek | 26 | 2.5% |
| Unknown | 26 | 2.5% |
| Iuka-carmi | 23 | 2.2% |
| Koegeboehn | 23 | 2.2% |
| Haynesville East | 23 | 2.2% |
| Box Ranch | 22 | 2.1% |
| Garfield | 21 | 2.0% |
| Nescatunga | 18 | 1.7% |
| John Creek | 14 | 1.3% |
| Colter | 14 | 1.3% |
What happened to these wells — on the Viola
457 of the 1,051 wells on the Viola are classed as plugged and abandoned. 4 were plugged at the State’s expense because no responsible party could be found, and 63 sit on the register as inactive — neither producing nor plugged.
⚠️ Two fields in this register disagree, and we show both rather than pick one: across Kansas, 245,220 wells are classed as plugged but 92,867 of them carry no plugging date, while 26,002 wells carry a date under another class. Here, 452 of these wells have a date on file. What each class means.
An old well on land in Kansas?
4 wells in Kansas were plugged at the State’s expense, out of 1,051 on the register — the sign that an operator was gone. If you find a well on your land, report it and do not tidy it up: knocking over casing can make you the responsible party. This site reads the register; it does not plug wells. Tell us where and we pass the request to Kansas operators and consultants.
We recommend nobody and we are nobody's agent. We have no arrangement with any firm today — we are collecting these requests in order to go and find them. What we do with this.
The wells
| Lease and well | Operator | Field | Depth (ft) | Year | Plugged |
|---|---|---|---|---|---|
| Thomsen 1-hp API 15-031-22572 | Haas Petroleum, LLC | Pieratt | 1455 | 2010 | State |
| Mcmillan 4 API 15-185-23250 | Key Gas Corp | Mcmillan | 3652 | 2004 | State |
| Fischer 1 API 15-185-21715 | Panther Energy Corp | Drach South | 3842 | 1983 | State |
| Hoffman Trust 2 API 15-033-21251 | Western Plains | Wildcat | 496 | — | State |
| Beadles Tatum 4 API 15-015-24235 | Brickley Enterprises, LLC | — | 3167 | 2025 | — |
| Seglem 4 API 15-015-24240 | Darrah Oil Company, LLC | Reynolds-schaffer | 3120 | 2025 | — |
| W&g Owwo 1 API 15-017-20920-0001 | Darrah Oil Company, LLC | Koegeboehn | 2488 | 2025 | — |
| Ils Land LLC 1 API 15-145-21904 | Jel Resources, LLC | Benson | 4079 | 2025 | — |
| Marguerite #1 API 15-151-22612 | Griffin, Charles N | Earl | 4773 | 2025 | — |
| Kay's 1-7 API 15-185-24174 | Rama Operating Co., INC | Newell | 4000 | 2025 | — |
| Wiw 4 API 15-095-22362 | Northern Natural Gas CO | — | 4323 | 2025 | — |
| Alley 16-43 Ob API 15-095-22363 | Northern Natural Gas CO | — | 4505 | 2025 | — |
| Mayce 1 API 15-007-24512 | Griffin, Charles N | Turkey Creek East | 4897 | 2025 | — |
| Jenna 1 API 15-007-24513 | Griffin, Charles N | Turkey Creek East | 4864 | 2025 | — |
| Wright 3 API 15-015-24216 | Jordan Oil Management INC | Whitewater | 2623 | 2024 | — |
| Griffith 21 API 15-151-22588 | Thomas Garner, INC | Rose Valley South | 4495 | 2024 | — |
| Ramondetta 3 API 15-015-24224 | Vess Oil Corporation | El Dorado | 2620 | 2024 | — |
| Ramondetta 5 API 15-015-24225 | Vess Oil Corporation | Hopkins Switch | 3129 | 2024 | — |
| Tanner 3 API 15-185-24151 | Lachenmayr Oil LLC | — | 4350 | 2024 | — |
| Peterson Trust 8-31 API 15-111-20567 | Mull Drilling Company, INC | — | 3198 | 2024 | — |
| Peterson Trust 9-31 API 15-111-20568 | Mull Drilling Company, INC | — | 3200 | 2024 | — |
| Peterson Trust 11-31 API 15-111-20569 | Mull Drilling Company, INC | — | 3451 | 2024 | — |
| Peterson Trust 10-31 API 15-111-20570 | Mull Drilling Company, INC | — | 3201 | 2024 | — |
| Ethan 2 API 15-007-24498 | Griffin, Charles N | Turkey Creek East | 4868 | 2024 | — |
| Dunkle 7 API 15-015-24232 | White & Ellis Drilling, INC | El Dorado | 2836 | 2024 | — |
| Willbanks 1-9 API 15-033-21800 | Thoroughbred Associates L.l.c | Unnamed | 5960 | 2024 | — |
| Madelyn 2 API 15-007-21982-0001 | Griffin, Charles N | Turkey Creek East | 4876 | 2024 | — |
| Madelyn 1 API 15-007-24499 | Griffin, Charles N | Turkey Creek East | 4867 | 2024 | — |
| Peterson Trust 4-31 API 15-111-20561 | Mull Drilling Company, INC | — | 3300 | 2023 | — |
| Peterson Trust 3-31 API 15-111-20562 | Mull Drilling Company, INC | Rainbow Ridge Northwest | 3250 | 2023 | — |
| Bushwood 1-26 API 15-185-24123 | Edison Operating Company LLC | St. John | 4200 | 2023 | — |
| India 1 API 15-185-24126 | Nec Operating - Kansas, LLC | Rattlesnake | 4260 | 2023 | — |
| Hullman Silver Bell 1-10 API 15-185-24129 | Jel Resources, LLC | Silver Bell | 3876 | 2023 | — |
| Korva #1 API 15-151-22565 | Griffin, Charles N | Lion Northwest | 4500 | 2023 | — |
| Patterson 3 API 15-015-24196 | Brickley Enterprises, LLC | Reynolds-schaffer | 3167 | 2023 | — |
| Seglem 6 API 15-015-24197 | B8 Investments | Reynolds-schaffer | 3187 | 2023 | — |
| Peterson Trust 5-31 Swd API 15-111-20564 | Mull Drilling Company, INC | — | 3484 | 2023 | — |
| Wk Unit 1-19 API 15-017-20932 | Darrah Oil Company, LLC | Koegeboehn | 2270 | 2023 | — |
| Peterson Trust 6-31 Swd API 15-111-20565 | Mull Drilling Company, INC | — | 3200 | 2023 | — |
| Peterson Trust 7-31 API 15-111-20566 | Mull Drilling Company, INC | — | 3445 | 2023 | — |
| Durham Farms 1-26 API 15-185-24148 | Edison Operating Company LLC | St. John | 4220 | 2023 | — |
| Mcculloch 13 API 15-015-24214 | Jordan Oil Management INC | Whitewater | 2669 | 2023 | — |
| Ramondetta (was Ramsey 10) 2 API 15-015-24215 | Vess Oil Corporation | El Dorado | 2580 | 2023 | — |
| Sewing 1-35 API 15-185-24094 | Edison Operating Company LLC | Unnamed | 4160 | 2022 | — |
| Mcculloch 12a API 15-015-24158 | Jordan Oil Management INC | Whitewater | 2669 | 2022 | — |
| Schweizer 5-35 API 15-155-21788 | Grand Mesa Operating CO | Schweizer | 3820 | 2022 | — |
| Panther Madden Unit 1 API 15-017-20930 | Darrah Oil Company, LLC | Unnamed | 2267 | 2022 | — |
| Shriver Trust 1-32 API 15-151-22547 | Shelby Resources LLC | West Commodore | 4775 | 2022 | — |
| Carter 1-30 API 15-025-21617-0001 | Mull Drilling Company, INC | Roadrunner | 6997 | 2022 | — |
| Peterson Trust 2-31 API 15-111-20559 | Mull Drilling Company, INC | — | 3200 | 2022 | — |
| Ns Unit 1 API 15-015-24163 | Brickley Enterprises, LLC | — | 3124 | 2022 | — |
| Niederee 1 API 15-145-21871 | Bear Petroleum, LLC | Burdett | 4598 | 2022 | — |
| Nelson 2 API 15-015-24164 | Brickley Enterprises, LLC | — | 3120 | 2022 | — |
| Wilson Trust 6-1 API 15-033-21792 | Thoroughbred Associates L.l.c | Unnamed | 4757 | 2022 | — |
| Ramondetta (was Ramsey 9) 1 API 15-015-24170 | Vess Oil Corporation | El Dorado | 2516 | 2022 | — |
| Alley 16-44 API 15-095-22349 | Northern Natural Gas CO | Cunningham | 4445 | 2022 | — |
| Huck 1-5 API 15-033-21794 | Hayes Oil & Gas LLC | Unnamed | 5926 | 2022 | — |
| Wilson Trust 6-2 API 15-033-21795 | Thoroughbred Associates L.l.c | Unnamed | 5975 | 2022 | — |
| Hardesty 2 API 15-015-24176 | Darrah Oil Company, LLC | — | 3156 | 2022 | — |
| Fisher 1-26 1 API 15-185-24074 | Thomas Garner, INC | Leiss Southwest | 4350 | 2021 | — |
| Gates-garrett 1-3 API 15-185-24077-0100 | Bird Dog Oil, LLC | Hickman South | 3716 | 2021 | — |
| Fincham 1-25 API 15-151-22529 | Siroky Oil Management | Barnes | 4494 | 2021 | — |
| Long Heirs 1 API 15-007-24380 | Briscoe Petroleum, LLC | Groendycke | 5233 | 2021 | — |
| Rose 1 API 15-151-22523-0001 | Griffin, Charles N | — | 4835 | 2021 | — |
| Moler A 38 API 15-015-24151 | Vess Oil Corporation | El Dorado | 2469 | 2021 | — |
| Panther Ranch 1-30 API 15-017-20928 | Darrah Oil Company, LLC | Unnamed | 2399 | 2021 | — |
| Shotton Unit 6-1 API 15-033-21790 | Thoroughbred Associates L.l.c | — | 5955 | 2021 | — |
| Schweizer 4-35 API 15-155-21784 | Grand Mesa Operating CO | Schweizer | 3830 | 2021 | — |
| Pound 3-3 API 15-185-24097 | Dixon Operating Company, LLC | — | 3775 | 2021 | — |
| Paislee 1 API 15-151-22505 | Charles N. Griffin | Springvale Townsite | 4900 | 2020 | — |
| Nelson 1 API 15-015-24138 | Brickley Enterprises, LLC | Reynolds-schaffer | 3142 | 2020 | — |
| Alameda 10-3 API 15-095-22332 | C & K Operating LLC | Alameda | 4430 | 2020 | — |
| Patterson 2 API 15-015-24139 | Brickley Enterprises, LLC | Reynolds-schaffer | 3186 | 2020 | — |
| Seglem 5 API 15-015-24140 | B8 Investments | Reynolds-schaffer | 3135 | 2020 | — |
| Hodgkinson 36-1 API 15-151-22482 | C&m Exploration, LLC | Wildcat | 4455 | 2019 | — |
| Seglem 3 API 15-015-24112 | D & J Investments | Reynolds-schaffer | 3137 | 2019 | — |
| Seglem 4 API 15-015-24119 | D & J Investments | Reynolds-schaffer | 3133 | 2019 | — |
| Strathman-mckee 10-1 API 15-131-20247 | Ia Operating, INC | Heinen | 3915 | 2019 | — |
| Reta 1 API 15-007-24351 | Indian Oil Co., INC | Lem | 4755 | 2019 | — |
| Bell C 3 API 15-007-24352 | Indian Oil Co., INC | Jem | 4840 | 2019 | — |
| O'connor 1-8 API 15-185-24053 | Edison Operating Company LLC | Knoche South | 4240 | 2019 | — |
| Moler A 37 API 15-015-24126 | Vess Oil Corporation | El Dorado | 2467 | 2019 | — |
| Terese 1h API 15-007-24322-0100 | Griffin, Charles N | Medicine Lodge-boggs | 4761 | 2018 | — |
| Donna 1h API 15-151-22470-0100 | Griffin, Charles N | Unnamed | 4062 | 2018 | — |
| Edna Mae 1-4 API 15-185-24023 | Dixon Operating Company, LLC | Rattlesnake Creek | 3796 | 2018 | — |
| Brubaker 1-17h API 15-151-22474-0100 | Shelby Resources LLC | Wildcat | 4492 | 2018 | — |
| Wild Turkey 1-7 API 15-185-24025 | Edison Operating Company LLC | — | 4124 | 2018 | — |
| Peace Creek C-5 API 15-155-21741 | Carrie Exploration & Development, LLC | Zenith-peace Creek | 3788 | 2017 | — |
| Davidson 30-1 API 15-151-22453 | C&m Exploration, LLC | Wildcat | 4510 | 2017 | — |
| Page 1-26 API 15-185-23976 | Edison Operating Company LLC | St. John | 4188 | 2017 | — |
| Leach 03-1216 API 15-085-20093 | Stroke of Luck Energy & Exploration LLC | Leach | 3475 | 2017 | — |
| Harris 06-1216 API 15-085-20094 | Stroke of Luck Energy & Exploration LLC | Leach | 2990 | 2017 | — |
| West Koogler S 108 API 15-015-24084 | Vess Oil Corporation | El Dorado | 2665 | 2017 | — |
| Reece-riffey 1-5h API 15-151-22463-0100 | Shelby Resources LLC | Wildcat | 4457 | 2017 | — |
| Davidson, Rachel 31-2 API 15-151-22465 | C&m Exploration, LLC | Unknown | 4600 | 2017 | — |
| Wright 1 Owwo API 15-015-01211-0002 | Giles, Benjamin M | Whitewater | 2627 | 2016 | — |
| Mcculloch 2a API 15-015-24061 | Giles, Benjamin M | Whitewater | 2641 | 2016 | — |
| Schweizer 3-35 API 15-155-21735 | Grand Mesa Operating CO | Schweizer | 3730 | 2016 | — |
| Koger 3 API 15-097-21823 | Herman L. Loeb, LLC | Alford | 5357 | 2016 | — |
| Lister A 40 API 15-015-24066 | Vess Oil Corporation | El Dorado | 2510 | 2016 | — |
| Davidson, Rachel 31-1 API 15-151-22452 | C&m Exploration, LLC | Unknown | 4514 | 2016 | — |
| Babinger 21 API 15-111-20517 | Trimble & Maclaskey Oil LLC | — | 2653 | 2015 | — |
| Babinger 23 API 15-111-20519 | Trimble & Maclaskey Oil LLC | Bradfield | 2613 | 2015 | — |
| Babinger 27 API 15-111-20521 | Trimble & Maclaskey Oil LLC | Bradfield | 2614 | 2015 | — |
| Rathke 3 API 15-111-20526 | Trimble & Maclaskey Oil LLC | — | 2655 | 2015 | — |
| Merven 1 API 15-095-22292 | Messenger Petroleum, INC | Willowdale | 4571 | 2015 | — |
| Omu 502s API 15-081-22102 | Merit Energy Company, LLC | Koenig | 6450 | 2015 | — |
| Belle 1 API 15-007-24272 | Griffin, Charles N | Unnamed | 4850 | 2015 | — |
| Madden A Unit 2 API 15-017-20921 | Range Oil Company, INC | Panther Ranch Southwest | 2280 | 2015 | — |
| Frederick 4-1 API 15-013-20047 | Bop West, LLC | Livingood | 3410 | 2015 | — |
| Jacobson 1 API 15-017-20922 | Range Oil Company, INC | Panther Ranch Southwest | 2310 | 2015 | — |
| Lipp-harvey 1-12 API 15-063-22263 | Carmen Schmitt, INC | Wildcat | 4440 | 2015 | — |
| Madden B 1 API 15-017-20924 | Range Oil Company, INC | Panther Ranch Southwest | 2450 | 2015 | — |
| Jacobson 2 API 15-017-20923 | Range Oil Company, INC | Panther Ranch Southwest | 2326 | 2015 | — |
| Hogan Family Trust 1-21 API 15-145-21807 | Downing-nelson Oil CO INC | Wildcat | 4460 | 2015 | — |
| Colleen 1 API 15-007-24298 | Charles N. Griffin | Toni-mike | 4830 | 2015 | — |
| Ford CO L&c CO 1-16 API 15-057-20883-0001 | Vincent Oil Corp | Wildcat | 6150 | 2014 | — |
| Gregg 'a' 1-19 API 15-033-21742 | Castelli Exploration, INC | Shimer | 5754 | 2014 | — |
| Gregg 'a' 2-19 API 15-033-21743 | Castelli Exploration, INC | Shimer | 5674 | 2014 | — |
| Griblin 21-hp API 15-073-24201 | Haas Petroleum, LLC | Virgil North | 2116 | 2014 | — |
| Shambaugh 'b' 34-hp API 15-073-24202 | Haas Petroleum, LLC | Virgil North | 2148 | 2014 | — |
| Dannenfelser 3 API 15-115-21473 | K-bar Oil | Covert-sellers | 2580 | 2014 | — |
| Weston, Gw #2 1-14 API 15-207-28833 | Laymon Oil Ii, LLC | Unknown | 1991 | 2014 | — |
| Dunn 1-25 API 15-033-21746 | Castelli Exploration, INC | Shimer South | 5730 | 2014 | — |
| Bird 3319 3-6 API 15-033-21748 | Sandridge Exploration and Production LLC | Bird | 6164 | 2014 | — |
| Gw Weston 12-14 API 15-207-28848 | Laymon Oil Ii, LLC | Winterschied | 1994 | 2014 | — |
| Howard 1 API 15-155-21683 | Novy Oil & Gas, INC | Zenith-peace Creek | 3845 | 2014 | — |
| Gregg 'a' 1-30 API 15-033-21749 | Castelli Exploration, INC | Shimer Southeast | 5304 | 2014 | — |
| Lee 1-23 API 15-025-21574 | Quail Oil & Gas, LC | Morrison Northeast | 6390 | 2014 | — |
| Huck Jobe 2 API 15-033-21751 | Castelli Exploration, INC | Unnamed | 5918 | 2014 | — |
| Babinger 15 API 15-111-20497 | Trimble & Maclaskey Oil LLC | Bradfield | 2663 | 2014 | — |
| Babinger 18 API 15-111-20498 | Trimble & Maclaskey Oil LLC | Bradfield | 2625 | 2014 | — |
| Larcom 2 API 15-015-24018 | C & G Drilling, INC | Blankenship | 2975 | 2014 | — |
| Z-bar 5-9 API 15-007-24150 | M & M Exploration, INC | Aetna Gas Area | 5200 | 2014 | — |
| Wait 7 API 15-033-21756 | American Warrior, INC | Bird South | 6400 | 2014 | — |
| West Babinger 3 API 15-111-20500 | Trimble & Maclaskey Oil LLC | Bradfield | 2775 | 2014 | — |
| West Babinger 1 API 15-111-20460-0001 | Trimble & Maclaskey Oil LLC | Bradfield | 2670 | 2014 | — |
| West Babinger 2 API 15-111-20476-0001 | Trimble & Maclaskey Oil LLC | Bradfield | 2667 | 2014 | — |
| Lister A 39 API 15-015-24021 | Vess Oil Corporation | El Dorado | 2512 | 2014 | — |
| Pierpoint A 131 API 15-015-24022 | Vess Oil Corporation | El Dorado | 2520 | 2014 | — |
| Babinger 16 API 15-111-20501 | Trimble & Maclaskey Oil LLC | — | 2621 | 2014 | — |
| Babinger 17 API 15-111-20502 | Trimble & Maclaskey Oil LLC | — | 2662 | 2014 | — |
| West Babinger 4 API 15-111-20503 | Trimble & Maclaskey Oil LLC | Unknown | 2800 | 2014 | — |
| Rich 4 API 15-031-23873 | Birk Petroleum | Evans North | 1680 | 2014 | — |
| Stueve 2 API 15-111-20506 | Schankie Well Service, INC | Bradfield | 2623 | 2014 | — |
| Stueve 1 API 15-111-20507 | Schankie Well Service, INC | Bradfield | 2608 | 2014 | — |
| Schindler 12 API 15-073-24210 | Johnson, Virgil Dba 3 G Oil CO | Virgil North | 2168 | 2014 | — |
| Fair B C-2 API 15-155-19082-0001 | Carrie Exploration & Development, A General Partnership | Zenith-peace Creek | 3912 | 2014 | — |
| Audrey C-1 API 15-155-21692 | Carrie Exploration & Development | Zenith-peace Creek | 3900 | 2014 | — |
| Stueve 3 API 15-111-20510 | Schankie Well Service, INC | Bradfield | 2605 | 2014 | — |
Other formations
- Squirrel 11,151
- Mississippian 10,791
- Arbuckle 10,446
- Bartlesville 10,057
- Chase Group 8,994
- Mississippi 5,201
- Lansing-kansas City 3,409
- Council Grove Group 2,462
- Morrow 1,978
- Arbuckle Group 1,866
- Oarb 1,814
- Lansing 1,580
- Cherokee Coals 1,493
- Peru 1,454
- Niobrara 1,349
- Cattleman 1,108
- Kansas City 997
- Squirrel Sand 995
- Arbuckle, Lansing Kansas City 993
- Cherokee 988
- St Louis 947
- Mississippian System 934
- Chase 899
- Wayside 884
- Marmaton 825
- Mrw L 809
- Chester 732
- Simpson 678
- Lansing Kansas City 576
- Mrw U 514
- Tucker 497
- Council Grove 417