The Simpson formation
678 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 | 4280 ft | 5005 ft | 2831 ft — deeper here |
What stands out on the Simpson
The operator named on most of these records is Skelly Oil CO, on 38 of them (5.6%), ahead of Haas Petroleum, LLC (14) and Thunderbird Drlg INC (13). The oldest well here was completed in 1847 and the most recent in 2025, and the deepest reaches 7100 feet — Morton 1-11, drilled in 2023.
Where it is produced
| County | Wells | Share |
|---|---|---|
| Sumner | 118 | 17.4% |
| Barber | 104 | 15.3% |
| Pratt | 82 | 12.1% |
| Rice | 78 | 11.5% |
| Harper | 59 | 8.7% |
| Butler | 30 | 4.4% |
| Stafford | 26 | 3.8% |
| Kingman | 25 | 3.7% |
| Coffey | 18 | 2.7% |
| Marion | 16 | 2.4% |
| Sedgwick | 16 | 2.4% |
| Wabaunsee | 14 | 2.1% |
| Cowley | 12 | 1.8% |
| Nemaha | 9 | 1.3% |
| Comanche | 9 | 1.3% |
| Jackson | 8 | 1.2% |
| Lyon | 7 | 1.0% |
| Mcpherson | 6 | 0.9% |
| Harvey | 6 | 0.9% |
| Ellis | 4 | 0.6% |
In which fields
| Field | Wells | Share |
|---|---|---|
| Wildcat | 71 | 10.5% |
| Chase-silica | 41 | 6.0% |
| Iuka-carmi | 40 | 5.9% |
| Tobias | 23 | 3.4% |
| Unnamed | 18 | 2.7% |
| Medicine Lodge-boggs | 17 | 2.5% |
| Gish | 16 | 2.4% |
| Scully | 14 | 2.1% |
| Unknown | 14 | 2.1% |
| Padgett | 10 | 1.5% |
| El Dorado | 9 | 1.3% |
| Bloom West | 8 | 1.2% |
| Ashton Southeast | 8 | 1.2% |
| Augusta | 7 | 1.0% |
What happened to these wells — on the Simpson
400 of the 678 wells on the Simpson are classed as plugged and abandoned. 2 were plugged at the State’s expense because no responsible party could be found, and 27 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, 366 of these wells have a date on file. What each class means.
An old well on land in Kansas?
2 wells in Kansas were plugged at the State’s expense, out of 678 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 |
|---|---|---|---|---|---|
| Miss Sharon 1 API 15-007-23563-0001 | Hart Energies, LLC | — | 5200 | 2014 | State |
| Norman 1 API 15-007-21630 | Brandt Production Co., INC | Hazelton | 5025 | 1983 | State |
| Donita 1-30 API 15-185-24176 | Rama Operating Co., INC | Mccandless | 4389 | 2025 | — |
| Henderson 'c' 1-2 API 15-151-22585 | Knighton Oil Company, INC | Moore | 4450 | 2024 | — |
| Kamber #1 API 15-151-22564 | Griffin, Charles N | Lion West | 4486 | 2023 | — |
| Rickard M 1 API 15-095-22352 | Molitor Oil, INC | Willowdale Southeast | 4634 | 2023 | — |
| Worcester A 1-22 API 15-065-24237 | Satchell Creek Petroleum, LLC | Alda South | 3814 | 2023 | — |
| Sara 1 API 15-185-24146 | Smith Oil Operations | Snider South | 3391 | 2023 | — |
| Teten B 14 API 15-155-21782 | Ressler Well Service, INC | Burrton | 3868 | 2022 | — |
| Graber 1 API 15-077-22188 | Gra Ex, LLC | Washbon | 4805 | 2022 | — |
| Reggie 1 API 15-185-24103 | Thomas Garner, INC | Unnamed | 4350 | 2022 | — |
| Stalnaker 'a' 1-12 API 15-191-22842 | Mccoy Petroleum Corporation | Unnamed | 4025 | 2022 | — |
| Haas 1 API 15-073-24246 | Hawkins Oil, LLC | Lamont | 1097 | 2022 | — |
| Doonan-morrison Unit 1 API 15-185-23049-0002 | Black Rock Resources, LLC | Dell North | 3624 | 2022 | — |
| Dietz 2-8 API 15-151-22526 | Deutsch Oil CO | Grimes | 4460 | 2021 | — |
| Peterson Trust 1-31 API 15-111-20553 | Mull Drilling Company, INC | Wildcat | 3200 | 2021 | — |
| Farney C 1 API 15-007-24381 | Woolsey Operating Company, LLC | Groendyke | 5255 | 2021 | — |
| Petty-christie Unit 1 API 15-185-24083 | Thomas Garner, INC | Leiss | 4335 | 2021 | — |
| Ancell 'b' 1-5 API 15-191-22833 | Mccoy Petroleum Corporation | Rome Northeast | 4120 | 2021 | — |
| Carter - Barker 13-34 API 15-151-22480 | K3 Oil & Gas Operating Company | Lunt Southeast | 4596 | 2019 | — |
| Clark 1 API 15-173-21059 | Urban Oil and Gas Group LLC | Greenwich | 3401 | 2019 | — |
| Vanzant 1 API 15-191-22812 | Energy Partners, LLC | Unnamed | 4450 | 2019 | — |
| John Vacek 7 API 15-053-21369 | Darrah, John Jay, Jr | Stoltenberg | 3280 | 2019 | — |
| Redwood Royalty 3 API 15-077-10186-0001 | Dexxon, INC | Grant | 4695 | 2019 | — |
| Wolf/neal 1 API 15-191-22815 | Dnr Oil and Gas, INC | Padgett | 3742 | 2019 | — |
| Taylor Unit 14-3 API 15-191-22799 | K3 Oil & Gas Operating Company | Wildcat | 5152 | 2018 | — |
| Padgett 5 API 15-191-22800 | Raney Oil Company, LLC | Padgett | 3927 | 2018 | — |
| Wolf 4 API 15-191-22801 | Raney Oil Company, LLC | Ashton Southeast | 3892 | 2018 | — |
| Austin 2 API 15-191-22806 | Drake Exploration, LLC | Ashton South | 3766 | 2018 | — |
| Lygrisse A1x API 15-173-21048 | Urban Oil and Gas Group LLC | Greenwich | 3400 | 2017 | — |
| Boyer 6-3 API 15-191-22788 | K3 Oil & Gas Operating Company | Eden Road South | 5150 | 2017 | — |
| Curtis 1-4 API 15-185-23987 | Dixon Operating Company, LLC | Rattlesnake Creek | 3823 | 2017 | — |
| Boyer 3-3 API 15-191-22774 | K3 Oil & Gas Operating Company | Wildcat | 5050 | 2016 | — |
| Rusk B 1 API 15-191-20618-0002 | Bear Petroleum, LLC | Rome | 4250 | 2016 | — |
| Snyder 3-16 API 15-131-20241 | Black Star 231 Corp | Kanaska | 3580 | 2016 | — |
| Henry Trust 6 API 15-085-20089 | L. D. Drilling, INC | Soldier | 3470 | 2014 | — |
| Mccune 4 API 15-185-13132-0002 | Lyons and Lyons, INC | Leesburgh | 4100 | 2014 | — |
| Fishgrab 1 API 15-007-24160 | Siroky Oil Management | Sawyer | 4670 | 2014 | — |
| Whitten 12-4 API 15-191-22757 | Stratex Oil & Gas Holdings, INC | Perth | 4300 | 2014 | — |
| Weber 1-20 API 15-191-22759 | O'brien Energy Resources Corp | Interchange South | 4052 | 2014 | — |
| Harrel 10 API 15-151-22439 | Timberline Oil & Gas Corporation | Iuka-carmi | 4309 | 2014 | — |
| Harrison/johnson 1 API 15-151-22440 | Timberline Oil & Gas Corporation | — | 4324 | 2014 | — |
| Siroky 2 API 15-151-22401 | Siroky Oil Management | Iuka-carmi | 4850 | 2013 | — |
| Stalnaker 21-1 A API 15-191-22667 | Endeavor Energy Resources, LP | Padgett West | 3900 | 2013 | — |
| Liebl 7 API 15-007-23982 | Wildcat Oil & Gas LLC | Wildcat | 4898 | 2013 | — |
| Mather 1 API 15-185-01539-0001 | Lyons and Lyons, INC | Leesburgh | 4125 | 2013 | — |
| Mccune 3 API 15-185-12790-0002 | Lyons and Lyons, INC | Leesburgh | 4075 | 2013 | — |
| Wedman Unit 1-6 API 15-015-23933 | Eagle Creek Corp | Wedman | 3200 | 2012 | — |
| Randels 'b' 3 API 15-007-23836 | Charles N. Griffin | Toni-mike | 4800 | 2012 | — |
| Henry Trust 1 API 15-085-20080 | L. D. Drilling, INC | Soldier | 3645 | 2012 | — |
| Wolkins 15-1 API 15-007-23860 | Lb Exploration, INC | Medicine Lodge-boggs | 5150 | 2012 | — |
| Hoener, W 1 API 15-151-22391 | Timberline Oil and Gas Corp | Iuka-carmi | 4305 | 2012 | — |
| Honeman 9 API 15-151-22392 | Timberline Oil and Gas Corp | Iuka-carmi | 4305 | 2012 | — |
| Brooks 2 API 15-035-22698-0001 | Pada Petroleum, INC | Gibson | 3806 | 2012 | — |
| Henry Trust 2 API 15-085-20082 | L. D. Drilling, INC | Soldier | 3675 | 2012 | — |
| Henry Trust 3 API 15-085-20083 | L. D. Drilling, INC | Soldier | 3648 | 2012 | — |
| Bowman 2 API 15-015-23953 | Range Oil Company, INC | Rose Hill | 3189 | 2012 | — |
| Walker 2-a API 15-035-24384 | Pada Petroleum, INC | Harvey | 3805 | 2011 | — |
| Larkin 14 1 API 15-007-23676 | Lb Exploration, INC | Deerhead North | 5094 | 2011 | — |
| Brooks 1 API 15-035-24412 | Pada Petroleum, INC | Gibson | 3820 | 2011 | — |
| Peters 1-a API 15-035-24415 | Pada Petroleum, INC | — | 3870 | 2011 | — |
| Kizler 8 API 15-111-20438 | Glacier Petroleum Co., INC | Kizler | 3368 | 2011 | — |
| Murphy 1-25 API 15-151-22377 | American Energies Corp | Wildcat | 4708 | 2011 | — |
| Sanders 1 API 15-151-22379 | Timberline Oil and Gas Corp | Lukens | 4352 | 2011 | — |
| Siroky 1 API 15-151-22381 | Siroky Oil Management | Iuka-carmi | 4458 | 2011 | — |
| Entz 'a' 6 API 15-015-23927 | Hawkins Oil, LLC | Entz | 2561 | 2011 | — |
| Shriver 'a' 1 API 15-015-23831 | Flowers Production Co., INC | El Dorado | 2480 | 2010 | — |
| Hoeme Trust 2-17 API 15-151-22348 | Deutsch Oil CO | Iuka-carmi | 4450 | 2010 | — |
| Skaer 24-a API 15-015-23850 | Vess Oil Corp | Augusta | 2623 | 2010 | — |
| Ferda 1-5 API 15-077-21675 | M & M Exploration, INC | Willtex Northwest | 5300 | 2010 | — |
| Thom 'c' 1-12 API 15-007-23571 | Val Energy, INC | Roundup South | 5130 | 2010 | — |
| Koppitz 1 API 15-007-23565 | Lotus Operating Co., L.l.c | Stranathan | 5200 | 2010 | — |
| Thiessen 5 API 15-191-22580 | Anstine & Musgrove INC | Padgett | 3860 | 2010 | — |
| Turner 1-12 API 15-077-21640 | American Warrior, INC | Bluff Spring | 5460 | 2009 | — |
| Molz 10-w API 15-007-23375 | Molz Oil CO | Stranathan | 5368 | 2009 | — |
| Fritzemeier 2 API 15-185-00183-0001 | Cambria Corp | White Cloud | 3650 | 2009 | — |
| Hrencher 'a' 1 API 15-007-23398 | R & B Oil and Gas, INC | Mcguire-goemann South | 4720 | 2009 | — |
| Mcbride 1 API 15-007-23397 | R & B Oil & Gas, INC | Rhodes East | 4945 | 2009 | — |
| Koehler 1-3 API 15-077-21647 | American Warrior, INC | Mollohan Southwest | 5110 | 2009 | — |
| Peters 2-29 API 15-035-24325 | Drake Exploration | Gibson | 3465 | 2009 | — |
| Thowe 'd' North 05-09 API 15-197-20282 | Piqua Petro, INC | Mill Creek | 2942 | 2009 | — |
| Lyssy 1-4 API 15-077-21651 | M & M Exploration, INC | Willtex Northwest | 5300 | 2009 | — |
| Williams-misak 1-5 API 15-077-21652 | M & M Exploration, INC | Willtex Northwest | 5300 | 2009 | — |
| Skaer 23-a API 15-015-23826 | Vess Oil Corp | Augusta | 2609 | 2009 | — |
| Stewart Farms 2-18 API 15-191-22564 | Bartelson Oil | Love-three | 4010 | 2009 | — |
| Weir 1-a API 15-035-24333 | Dawson-markwell Exploration CO | Murphy | 3515 | 2009 | — |
| Houlton 'a' 2 API 15-007-23449 | Chieftain Oil Co., INC | Rhodes | 5084 | 2009 | — |
| Theissen 2 API 15-191-22567 | Jolen Operating CO | Padgett | 3862 | 2009 | — |
| Mcbride 2 API 15-007-23452 | R & B Oil & Gas, INC | Rhodes Northeast | 5155 | 2009 | — |
| Marrs 2 API 15-035-24342 | Aas Oil Co., INC | Gibson | 3475 | 2009 | — |
| Thowe 'd' 01-08 API 15-197-20271 | Piqua Petro, INC | Mill Creek | 3154 | 2008 | — |
| Platt 1-31 API 15-007-23305 | Hummon Corp | Wildcat | 5302 | 2008 | — |
| Musson 1-a API 15-035-24296 | Cec Operations LLC | Murphy | 3851 | 2008 | — |
| Thowe 'a' 03-08 API 15-197-20273 | Piqua Petro, INC | Mill Creek | 3170 | 2008 | — |
| Maloney 'm' 1 API 15-077-21633 | Mtm Petroleum, INC | Washbon | 4784 | 2008 | — |
| Wilson 4 API 15-173-20996 | Lachenmayr Oil LLC | Valley Center | 3454 | 2008 | — |
| Mccurry 12-1 API 15-079-20676 | Cyclone Petroleum, INC | Burrton Northeast | 3851 | 2008 | — |
| Hunter-gramley 'a' 2 API 15-007-23348 | R & B Oil and Gas, INC | Rhodes Northeast | 4995 | 2008 | — |
| Neal 15 API 15-191-22545 | Wellstar Corporation | — | 3730 | 2008 | — |
| Dohm 'a' 1 API 15-007-23373 | R & B Oil and Gas, INC | Sharon Northwest | 4641 | 2008 | — |
| Marrs 1 API 15-035-24320 | Aas Oil Co., INC | Gibson | 3826 | 2008 | — |
| Smith 3 API 15-095-22059 | Five Star Energy, INC | Ruth Northeast | 4950 | 2007 | — |
| Meredith-jones Unit 1 API 15-191-22487 | Bartelson Oil | Erskine North | 4430 | 2007 | — |
| Reed 10 API 15-173-20988 | Howard Lachenmayr Oil CO | Valley Center | 3444 | 2007 | — |
| Springer 2-4 API 15-007-23115 | Val Energy, INC | Medicine Lodge-boggs | 4934 | 2007 | — |
| Circle 3 API 15-007-23123 | Woolsey Operating Co., LLC | Roundup South | 5110 | 2007 | — |
| Simons 3-22 API 15-095-22109 | Vincent Oil Corp | Wildcat | 4580 | 2007 | — |
| Kubik 1 API 15-191-22510 | Future Petroleum Co., LLC | Wildcat | 5070 | 2007 | — |
| Chapman 'b' 4 API 15-191-22514 | Pada Petroleum, INC | Ashton Southeast | 3844 | 2007 | — |
| Bishop 7 API 15-077-21588 | Novy Oil & Gas, INC | Gish | 4763 | 2007 | — |
| Platt 2-6 API 15-007-23183 | Hummon Corp | Wildcat | 5322 | 2007 | — |
| Entz 4 API 15-015-23746 | Hawkins Oil, LLC | El Dorado | 2660 | 2007 | — |
| Dietz 1-8a API 15-151-22281 | Deutsch Oil CO | Grimes | 4462 | 2007 | — |
| Dohm 1 API 15-007-23194 | R & B Oil and Gas, INC | Sharon Northwest | 4783 | 2007 | — |
| Entz 5 API 15-015-23748 | Hawkins Oil, LLC | El Dorado | 2500 | 2007 | — |
| J. T. Miller 1 API 15-035-24228-0100 | Future Petroleum Co. LLC | Wildcat | 2951 | 2006 | — |
| Hunt 1-18 API 15-077-21540 | Okt Resources, LLC | Harmon | 4784 | 2006 | — |
| Ruby A-2 Twin 3 API 15-007-22981 | Molz Oil CO | Mcguire-goemann South | 4820 | 2006 | — |
| Helwig 1-15 API 15-185-23345 | F.g. Holl Co., LLC | Taylor West | 3850 | 2006 | — |
| Staats Trust 1-22 API 15-007-23012 | F.g. Holl Co., LLC | Stannard Southeast | 4800 | 2006 | — |
| Derley 1 API 15-047-21525 | Mid-continent Energy Corp | Bordewick East | 4800 | 2006 | — |
| Padgett 'a' 4 API 15-191-22475 | Seed Group | Padgett | 3930 | 2006 | — |
| Springer 1-4 API 15-007-23076 | Val Energy, INC | Medicine Lodge-boggs | 4975 | 2006 | — |
| Potter 'a' 17 API 15-051-25582 | Damar Resources, INC | Potter | 3440 | 2006 | — |
| Heg Whitten 2-12 API 15-191-22490 | Hewitt Energy Group, INC | Perth | 4486 | 2006 | — |
| Stueder 'a' 9 API 15-151-22250 | Timberline Oil and Gas Corp | Iuka-carmi | 4317 | 2006 | — |
| Alexander 1-11 API 15-007-22886 | American Warrior, INC | Deerhead North | 5043 | 2005 | — |
| Alexander 2-11 API 15-007-22887 | American Warrior, INC | Deerhead North | 4979 | 2005 | — |
| Charles 2-14 API 15-173-20982 | Bear Petroleum, INC | Von Dette North | 3500 | 2005 | — |
| Curry 'a' 1-32 API 15-191-22456 | Mccoy Petroleum Corp | Erskine | 4419 | 2005 | — |
| Work 4-29 API 15-191-22464 | Cyclone Petroleum, Incorporated | Ashton Southeast | 3590 | 2005 | — |
| Pizinger 4 API 15-079-20659 | Howell Oil Company, INC | Burrton | 3652 | 2004 | — |
| Hetzke, A 3 API 15-113-21292 | Hess Oil CO | Graber | 3475 | 2004 | — |
| Fryar 4 API 15-077-21486 | Mtm Petroleum, INC | Spivey-grabs-basil | 4804 | 2004 | — |
| Mccartney 1-7 API 15-191-22433 | Bear Petroleum, INC | Rome | 4259 | 2004 | — |
| Patty 'a' Was Bergman 'a' 2 API 15-095-21915 | Mkj Oil CO LLC | Ruth Northeast | 4730 | 2004 | — |
| Hanwit 1 API 15-151-22193 | Lotus Operating Co. / Vincent Oil Corp | Springvale Northwest | 4900 | 2003 | — |
| Ruby 2 API 15-007-22731 | Molz Oil CO | Little Sandy Creek | 4760 | 2003 | — |
| Kanopolis Federal 1-21 API 15-053-21113 | Rupe Oil Company, INC | Kanaska | 2392 | 2003 | — |
| Mills 2-x API 15-015-23637 | Crown Energy Company | El Dorado | 2608 | 2003 | — |
| Lendon 'a' 3 API 15-007-22735 | Beren Corp | Degeer Southwest | 5005 | 2003 | — |
| Bettenbrock 1-28 API 15-053-21114 | Rupe Oil Company, INC | Kanaska | 3033 | 2003 | — |
| Morris 1 API 15-191-22403 | Key Gas Corp | Osborn Northwest | 4364 | 2003 | — |
| Canfield 2 API 15-007-22765 | Smith Oil Operations | Palmer | 5124 | 2003 | — |
| Slief 1-5 API 15-151-22199 | Vincent Oil Corp | Wildcat | 4920 | 2003 | — |
| Z-bar 3-33 API 15-007-22711 | Hummon Corp | Unnamed | 5058 | 2002 | — |
| Ballet 11-3 API 15-033-21321 | Redland Resources, INC | Aetna Gas Area | 5450 | 2002 | — |
| Dietz 12 API 15-151-21647-0002 | — | Iuka-carmi | 4430 | 2002 | — |
| Krampe 1-15 API 15-185-23160 | F.g. Holl Co., LLC | Bayer | 3845 | 2002 | — |
| Mike Mcclain 1 API 15-131-20173 | — | Wildcat | 3662 | 2001 | — |
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
- Viola 1,051
- 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
- Lansing Kansas City 576
- Mrw U 514
- Tucker 497
- Council Grove 417