The Jefferson-sycamore field
1,460 wells — 0.3% of the Kansas register.
What stands out in the Jefferson-sycamore field
The operator named on most of these records is Dart Cherokee Basin Operating Co., LLC, on 68 of them (4.7%), ahead of Sunwest Petroleum, INC (67) and Benson Mineral Group, INC (62). The oldest well here was completed in 1909 and the most recent in 2025, and the deepest reaches 2835 feet — Ira Uitts 1, drilled in 1954.
| Measurement | Median | 90th percentile | Kansas median |
|---|---|---|---|
| Total depth | 1183 ft | 1426 ft | 2831 ft — shallower here |
What happened to these wells — in the Jefferson-sycamore field
423 of the 1,460 wells in the Jefferson-sycamore field are classed as plugged and abandoned. 6 were plugged at the State’s expense because no responsible party could be found, and 107 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, 415 of these wells have a date on file. What each class means.
Producing formations
| Formation | Wells | Share |
|---|---|---|
| Cherokee Coals | 79 | 5.4% |
| Mississippian | 69 | 4.7% |
| Bartlesville | 53 | 3.6% |
| Arbuckle | 30 | 2.1% |
| Riverton, Weir | 29 | 2.0% |
| Cherokee Coal | 17 | 1.2% |
| Weir Coal | 15 | 1.0% |
| Wayside | 15 | 1.0% |
| Cherokee | 15 | 1.0% |
| Mississippi | 14 | 1.0% |
The formation is recorded on only 21 % of Kansas wells, so this table describes the minority that carry one.
Where the field lies
| County | Wells | Share |
|---|---|---|
| Montgomery | 1,386 | 94.9% |
| Wilson | 1 | 0.1% |
Who operates there
| Operator | Wells | Share |
|---|---|---|
| Dart Cherokee Basin Operating Co., LLC | 68 | 4.7% |
| Sunwest Petroleum, INC | 67 | 4.6% |
| Benson Mineral Group, INC | 62 | 4.2% |
| Frankfort Oil CO | 57 | 3.9% |
| Tonda Oil | 43 | 2.9% |
| Great Eastern Energy & Development | 40 | 2.7% |
| Layne Energy Operating, LLC | 40 | 2.7% |
| Kansas Production Eqr, LLC | 36 | 2.5% |
| Kanmap INC | 25 | 1.7% |
| Stekoll Petroleum CO | 24 | 1.6% |
| Williams Robert J | 23 | 1.6% |
| Jones Gas Corporation | 23 | 1.6% |
| Williams Bob Entpr | 22 | 1.5% |
| Bright Wayne E | 22 | 1.5% |
An old well on land in Kansas?
6 wells in Kansas were plugged at the State’s expense, out of 1,460 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 |
|---|---|---|---|---|---|
| Sandborn 1 API 15-125-27517 | State of Ks | Jefferson-sycamore | 800 | 1985 | State |
| Hester Jch-2 API 15-125-20915 | Stekoll Petroleum | Jefferson-sycamore | 416 | 1976 | State |
| Hester 12 API 15-125-20690 | Stekoll Petroleum Company | Jefferson-sycamore | 400 | 1975 | State |
| Hester Jch-87 API 15-125-20569 | Stekoll Pet CO | Jefferson-sycamore | 448 | 1974 | State |
| Hester Jch-86 API 15-125-20581 | Stekoll Pet CO | Jefferson-sycamore | 448 | 1974 | State |
| Patterson 16 API 15-125-20403 | Layton Oil | Jefferson-sycamore | 1000 | 1972 | State |
| Lindley 7 API 15-125-32571 | Horton, John | Jefferson-sycamore | 933 | 2025 | — |
| Janzen South N-2 API 15-125-32555 | Finney, Kyler Dba Finney Oil Company | Jefferson-sycamore | 1270 | 2024 | — |
| Bolte 1 API 15-125-32482 | Melander, Chris Dba Melander Drilling | Jefferson-sycamore | 580 | 2017 | — |
| Rector D4 API 15-125-32362 | Colt Energy INC | Jefferson-sycamore | 1280 | 2014 | — |
| Wehmeyer 1-15 API 15-125-32267-0001 | — | Jefferson-sycamore | 1210 | 2013 | — |
| Rector B2 API 15-125-32358 | Colt Energy INC | Jefferson-sycamore | 1270 | 2013 | — |
| Rector B4 API 15-125-32359 | Colt Energy INC | Jefferson-sycamore | 1237 | 2013 | — |
| Rector C1 API 15-125-32360 | Colt Energy INC | Jefferson-sycamore | 1270 | 2013 | — |
| Rector D3-i API 15-125-32365 | Colt Energy INC | Jefferson-sycamore | 1270 | 2013 | — |
| Wheeler-hadden 5-13 API 15-125-31948-0400 | Cep Mid-continent LLC | Jefferson-sycamore | 1398 | 2012 | — |
| Wehmeyer 1-15 API 15-125-32267 | Gerald Wehmeyer | Jefferson-sycamore | 1210 | 2012 | — |
| S. Miller 4 API 15-125-29299-0002 | — | Jefferson-sycamore | 1148 | 2011 | — |
| Chk 1 API 15-125-32108 | Fidelity Energy, INC | Jefferson-sycamore | 1314 | 2011 | — |
| Chk 2 API 15-125-32109 | Fidelity Energy, INC | Jefferson-sycamore | 1263 | 2011 | — |
| H. Mcdaniel 'c' 1 API 15-125-30214-0001 | — | Jefferson-sycamore | 1290 | 2011 | — |
| Patterson (chk) 4 API 15-125-32145 | Fidelity Energy, INC | Jefferson-sycamore | 1350 | 2011 | — |
| Wheeler-hadden 5-13 API 15-125-31948 | Cep Mid-continent LLC | Jefferson-sycamore | 1400 | 2010 | — |
| Scott F-1 API 15-125-31962 | Fidelity Energy, INC | Jefferson-sycamore | 1465 | 2010 | — |
| J. Miller 2 API 15-125-29294-0001 | — | Jefferson-sycamore | 1100 | 2010 | — |
| Rothgeb 4 API 15-125-31861 | Wilson, Jordan | Jefferson-sycamore | 1311 | 2009 | — |
| Sears 15-19 API 15-125-31307 | Layne Energy Operating, LLC | Jefferson-sycamore | 1187 | 2008 | — |
| Knisley 8-4 API 15-125-31437 | Energyquest Management, LLC | Jefferson-sycamore | 955 | 2008 | — |
| Lindley 2-07 API 15-125-31484 | Sabine Operating Services | Jefferson-sycamore | 1389 | 2008 | — |
| Lindley 4-07 API 15-125-31486 | Sabine Operating Services | Jefferson-sycamore | 1389 | 2008 | — |
| Lindley 'a' 2 API 15-125-27073-0002 | — | Jefferson-sycamore | 1388 | 2008 | — |
| Knisley 1-5 API 15-125-30887-0001 | — | Jefferson-sycamore | 1012 | 2008 | — |
| Mcdaniel 1 API 15-125-30037-0001 | — | Jefferson-sycamore | 1238 | 2008 | — |
| F. Smith 5-28 API 15-125-30119-0001 | — | Jefferson-sycamore | 1452 | 2008 | — |
| Wheeler-hadden 8-2 API 15-125-30074-0001 | — | Jefferson-sycamore | 1419 | 2008 | — |
| Schmidt 'a' 13-4 API 15-125-30542 | Layne Energy Operating, LLC | Jefferson-sycamore | 1276 | 2007 | — |
| Stair 5-33 API 15-125-30852 | Layne Energy Operating, LLC | Jefferson-sycamore | 1247 | 2007 | — |
| King 3-5 API 15-125-31006 | Layne Energy Operating, LLC | Jefferson-sycamore | 1282 | 2007 | — |
| Hoseney 3-16 API 15-125-31028 | Layne Energy Operating, LLC | Jefferson-sycamore | 1283 | 2007 | — |
| Bever 7-31 API 15-125-31131 | Layne Energy Operating, LLC | Jefferson-sycamore | 1205 | 2007 | — |
| Base 14-34 API 15-125-31132 | Layne Energy Operating, LLC | Jefferson-sycamore | 1191 | 2007 | — |
| Heckman 9-28 API 15-125-31147 | Layne Energy Operating, LLC | Jefferson-sycamore | 1062 | 2007 | — |
| Jones 12-7 API 15-125-31306 | Layne Energy Operating, LLC | Jefferson-sycamore | 1318 | 2007 | — |
| Friess, S 13-3 API 15-125-31324 | Layne Energy Operating, LLC | Jefferson-sycamore | 1103 | 2007 | — |
| Friess, J.d 9-29 API 15-205-27149 | Layne Energy Operating, LLC | Jefferson-sycamore | 1228 | 2007 | — |
| Big Hill Farms 11-29 API 15-125-31325 | Layne Energy Operating, LLC | Jefferson-sycamore | 1063 | 2007 | — |
| Smith 5-21 API 15-125-31327 | Layne Energy Operating, LLC | Jefferson-sycamore | 1188 | 2007 | — |
| Mills Trust 4-31 API 15-125-31329 | Layne Energy Operating, LLC | Jefferson-sycamore | 1228 | 2007 | — |
| Felts 22-3 API 15-125-31333 | Energyquest Management, LLC | Jefferson-sycamore | 1139 | 2007 | — |
| Chism 3-12 API 15-125-31353 | Layne Energy Operating, LLC | Jefferson-sycamore | 1504 | 2007 | — |
| Knisley 1-2 API 15-125-31432 | Energyquest Management, LLC | Jefferson-sycamore | 1132 | 2007 | — |
| Mitchell Acres 25-1 API 15-125-31433 | Energyquest Management, LLC | Jefferson-sycamore | 1030 | 2007 | — |
| Lindley 1-07 API 15-125-31455 | Sabine Operating Services | Jefferson-sycamore | 1630 | 2007 | — |
| Barry Beurskens 13-21 API 15-125-31144-0002 | — | Jefferson-sycamore | 1069 | 2007 | — |
| Mccabe, E 2-16 API 15-125-30117 | Layne Energy Operating, LLC | Jefferson-sycamore | 1512 | 2006 | — |
| Wheeler 1-19 API 15-125-30795 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1525 | 2006 | — |
| O'brien-sewell 3-28 API 15-125-30859 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1122 | 2006 | — |
| G. W. Corn 1 API 15-125-30918 | Mcclenning, Mike | Jefferson-sycamore | 817 | 2006 | — |
| Gillman W-3 API 15-125-30997 | A X & P, INC | Jefferson-sycamore | 423 | 2006 | — |
| Applebaugh 1-8 API 15-125-31003 | Layne Energy Operating, LLC | Jefferson-sycamore | 1363 | 2006 | — |
| Wheeler 1-16 API 15-125-31071 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1368 | 2006 | — |
| Barry Beurskens 13-21 API 15-125-31144 | Layne Energy Operating, LLC | Jefferson-sycamore | 1069 | 2006 | — |
| West 5-28 API 15-125-31145 | Layne Energy Operating, LLC | Jefferson-sycamore | 1078 | 2006 | — |
| Schenk 12-10 API 15-125-30839-0001 | — | Jefferson-sycamore | 1162 | 2006 | — |
| C. Smith 5-30 API 15-125-30136 | Layne Christensen Canada Limited | Jefferson-sycamore | 1499 | 2005 | — |
| B. Chism 3-31 API 15-125-30137 | Layne Christensen Canada, LTD | Jefferson-sycamore | 1459 | 2005 | — |
| Knipmeyer 1-6 API 15-125-30314 | Shawnee Oil & Gas, LLC | Jefferson-sycamore | 1241 | 2005 | — |
| Jones 2 API 15-125-30634 | Bear Petroleum, INC | Jefferson-sycamore | 1627 | 2005 | — |
| Worl 3-27 API 15-125-30668 | Layne Energy Operating, LLC | Jefferson-sycamore | 1206 | 2005 | — |
| Corn 1-32 API 15-125-30708 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1204 | 2005 | — |
| Holler 1-33 API 15-125-30709 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1137 | 2005 | — |
| Wint 9-19 API 15-125-30712 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1204 | 2005 | — |
| O'brien-sewell 1-28 API 15-125-30714 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1104 | 2005 | — |
| Veith 1-28 API 15-125-30715 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1103 | 2005 | — |
| Clarkson 41 3 API 15-125-30722 | Jordan Wilson | Jefferson-sycamore | 790 | 2005 | — |
| Atherton 14-6 API 15-125-30723 | Layne Energy Operating, LLC | Jefferson-sycamore | 1268 | 2005 | — |
| Mcdaniel, H. 'a' 2 API 15-125-30724 | Jones Gas Corporation | Jefferson-sycamore | 1268 | 2005 | — |
| Sherwin 'c' 2 API 15-125-30725 | Jones Gas Corporation | Jefferson-sycamore | 1398 | 2005 | — |
| Sherwin 'b' 5 API 15-125-30726 | Jones Gas Corporation | Jefferson-sycamore | 1384 | 2005 | — |
| H. Mcdaniel 'b' 3 API 15-125-30727 | Jones Gas Corporation | Jefferson-sycamore | 1414 | 2005 | — |
| Scott Trust 'a' 3-4 API 15-125-30384-0001 | Dart Cherokee Basin Operating Company LLC | Jefferson-sycamore | 1303 | 2005 | — |
| Sizemore 7-5 API 15-125-30731 | Layne Energy Operating, LLC | Jefferson-sycamore | 1170 | 2005 | — |
| Bowen Flour Mills Co. 'd' 3-32 API 15-125-30732 | Dart Cherokee Basin Operating Co., LLC | Jefferson-sycamore | 1426 | 2005 | — |
| Lochmiller 5-32 API 15-125-30735 | Layne Energy Operating, LLC | Jefferson-sycamore | 1178 | 2005 | — |
| Gibson 7-27 API 15-125-30742 | Layne Energy Operating, LLC | Jefferson-sycamore | 1163 | 2005 | — |
| Hladky 11-28 API 15-125-30743 | Layne Energy Operating, LLC | Jefferson-sycamore | 1178 | 2005 | — |
| Hogan 6-6 API 15-125-30745 | Layne Energy Operating, LLC | Jefferson-sycamore | 1304 | 2005 | — |
| Catron 5-15 API 15-125-30790 | Layne Energy Operating, LLC | Jefferson-sycamore | 1151 | 2005 | — |
| Koger 8-25 API 15-125-30797 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1578 | 2005 | — |
| Denton 1-21 API 15-125-30799 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1087 | 2005 | — |
| Sauder 1-7 API 15-125-30801 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1313 | 2005 | — |
| Shaffer 1-17 API 15-125-30802 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1174 | 2005 | — |
| Thompson 2-6 API 15-125-30803 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1250 | 2005 | — |
| Laughlin 1-3 API 15-125-30810 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1112 | 2005 | — |
| Bomac 8-3 API 15-125-30815 | Layne Energy Operating, LLC | Jefferson-sycamore | 1533 | 2005 | — |
| H. Mcdaniel 'd' 2 API 15-125-30824 | Jones Gas Corporation | Jefferson-sycamore | 1255 | 2005 | — |
| Mcdaniel 2 API 15-125-30825 | Jones Gas Corporation | Jefferson-sycamore | 1280 | 2005 | — |
| Jones 3 Swd API 15-125-30826 | Bear Petroleum, INC | Jefferson-sycamore | 1891 | 2005 | — |
| Eastep 1-23 API 15-125-30827 | Layne Energy Operating, LLC | Jefferson-sycamore | 1240 | 2005 | — |
| Eastep 10-34 API 15-125-30829 | Layne Energy Operating, LLC | Jefferson-sycamore | 1287 | 2005 | — |
| Schabel, S. and L. 'c' 4-23 API 15-125-30830 | Dart Cherokee Basin Operating Co., LLC | Jefferson-sycamore | 1366 | 2005 | — |
| Schenk 12-10 API 15-125-30839 | Layne Energy Operating, LLC | Jefferson-sycamore | 1162 | 2005 | — |
| Gaut 1-33 API 15-125-30844 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1212 | 2005 | — |
| Gaut 2-33 API 15-125-30845 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1212 | 2005 | — |
| Gaut 3-33 API 15-125-30846 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1237 | 2005 | — |
| Gillman W-2 API 15-125-30848 | A X & P, INC | Jefferson-sycamore | 487 | 2005 | — |
| Henry 1-24 API 15-125-30856 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1588 | 2005 | — |
| King 1-13 API 15-125-30858 | Kansas Production Eqr, LLC | Jefferson-sycamore | 1528 | 2005 | — |
| Shepherd 12-33 API 15-125-30863 | Layne Energy Operating, LLC | Jefferson-sycamore | 1162 | 2005 | — |
| Hill 1 API 15-125-30866 | Production Maintenance Service | Jefferson-sycamore | 1138 | 2005 | — |
| Judy Gruver 1 API 15-125-30871 | Michael L. Taylor Well Services | Jefferson-sycamore | 1266 | 2005 | — |
| Judy Gruver 2 API 15-125-30882 | Michael L. Taylor Well Service | Jefferson-sycamore | 1271 | 2005 | — |
| W. Chism 5-32 API 15-125-30131-0001 | Layne Christensen Canada, LTD | Jefferson-sycamore | 1474 | 2005 | — |
| C. Smith 5-30 API 15-125-30136-0001 | — | Jefferson-sycamore | 1498 | 2005 | — |
| Chism, W 11-29 API 15-125-30127 | Layne Christensen Canada LTD | Jefferson-sycamore | 1478 | 2004 | — |
| C. Smith 3-5 API 15-125-30133 | Layne Christensen Canada Limited | Jefferson-sycamore | 1299 | 2004 | — |
| Buckles 15-29 API 15-125-30315 | Shawnee Oil & Gas, LLC | Jefferson-sycamore | 1123 | 2004 | — |
| Green South 2 API 15-125-30348 | Twin Valley Enterprises, INC | Jefferson-sycamore | 1235 | 2004 | — |
| Pierson 32-13 API 15-125-30352 | Sunwest Petroleum, INC | Jefferson-sycamore | 1390 | 2004 | — |
| H. Mcdaniel 'b' 1 API 15-125-30411 | Jones Gas Corporation | Jefferson-sycamore | 1090 | 2004 | — |
| G. Shaffer 6-29 API 15-125-30431 | Kanmap, INC | Jefferson-sycamore | 1230 | 2004 | — |
| Leoffler 8-29 API 15-125-30432 | Kanmap, INC | Jefferson-sycamore | 1182 | 2004 | — |
| Hladky 14-28 Swd API 15-125-30449 | Shawnee Oil & Gas, LLC | Jefferson-sycamore | 1868 | 2004 | — |
| Springer, D. (sloan East) 8 API 15-125-30498 | Twin Valley Enterprises, INC | Jefferson-sycamore | 1027 | 2004 | — |
| Springer, D. (sloan West) 9 API 15-125-30499 | Twin Valley Enterprises, INC | Jefferson-sycamore | 1002 | 2004 | — |
| H. Mcdaniel 'a' 1 API 15-125-30512 | Jones Gas Corporation | Jefferson-sycamore | 1396 | 2004 | — |
| Sherwin C 1 API 15-125-30514 | Jones Gas Corporation | Jefferson-sycamore | 1400 | 2004 | — |
| H. Mcdaniel 'd' 1 API 15-125-30519 | Jones Gas Corporation | Jefferson-sycamore | 1215 | 2004 | — |
| Sherwin 'a' 2 API 15-125-30528 | Jones Gas Corporation | Jefferson-sycamore | 1368 | 2004 | — |
| Chism 13-29 API 15-125-30543 | Layne Energy Operating, LLC | Jefferson-sycamore | 1485 | 2004 | — |
| Smith 5-29 API 15-125-30544 | Layne Energy Operating, LLC | Jefferson-sycamore | 1475 | 2004 | — |
| Chism 15-30 API 15-125-30545 | Layne Energy Operating, LLC | Jefferson-sycamore | 1401 | 2004 | — |
| Smith 7-30 API 15-125-30546 | Layne Energy Operating, LLC | Jefferson-sycamore | 1495 | 2004 | — |
| Smith Trust 'a' 1-5 API 15-125-30208-0002 | — | Jefferson-sycamore | 1419 | 2004 | — |
| Couch 7-31 API 15-125-30584 | Layne Energy Operating, LLC | Jefferson-sycamore | 1346 | 2004 | — |
| Buckles 'c' 4-5 API 15-125-30204-0001 | — | Jefferson-sycamore | 1444 | 2004 | — |
| H. Mcdaniel 'b' 2 API 15-125-30596 | Jones Gas Corporation | Jefferson-sycamore | 1411 | 2004 | — |
| H. Mcdaniel 'c' 4 API 15-125-30598 | Jones Gas Corporation | Jefferson-sycamore | 1394 | 2004 | — |
| Davis, D 1-2 API 15-125-30600 | Brower Oil and Gas Co., INC | Jefferson-sycamore | 1340 | 2004 | — |
| Mavers 1-11 Swd API 15-125-30601 | Brower Oil & Gas Co., INC | Jefferson-sycamore | 1880 | 2004 | — |
| Mavers 1-11 API 15-125-30602 | Brower Oil & Gas Co., INC | Jefferson-sycamore | 1370 | 2004 | — |
| Mays 1-12 API 15-125-30603 | Brower Oil & Gas Co., INC | Jefferson-sycamore | 1400 | 2004 | — |
| C. Smith 3-5 API 15-125-30133-0002 | — | Jefferson-sycamore | 1299 | 2004 | — |
| C. Smith 3-5 API 15-125-30133-0001 | — | Jefferson-sycamore | 1299 | 2004 | — |
| B. Chism 9-31 API 15-125-30129-0001 | — | Jefferson-sycamore | 1342 | 2004 | — |
| Scott 3-9 API 15-125-30125 | Layne Christensen Canada Limited | Jefferson-sycamore | 1238 | 2003 | — |
| Fred Smith 3-28 API 15-125-30126 | Layne Christensen Canada Limited | Jefferson-sycamore | 1439 | 2003 | — |
| B. Chism 9-31 API 15-125-30129 | Layne Christensen Canada, LTD | Jefferson-sycamore | 1342 | 2003 | — |
| W. Chism 5-32 API 15-125-30131 | Layne Christensen Canada, LTD | Jefferson-sycamore | 1474 | 2003 | — |
| W. Chism 13-32 API 15-125-30132 | Layne Christensen Canada, LTD | Jefferson-sycamore | 1305 | 2003 | — |
Fields of a comparable size
- Gorham 2,178
- Spivey-grabs-basil 2,172
- Peru-sedan 2,058
- Vernon 1,947
- Neosho Falls-leroy 1,800
- Bush City Shoestring 1,727
- Wayside-havana 1,617
- El Dorado 1,480
- Neodesha 1,433
- Burrton 1,362
- Iola 1,358
- Hugoton 1,142
- Coffeyville-cherryvale 1,140
- Stoltenberg 1,111
- Lost Springs 1,083
Neighbours by the number of wells, not a ranking: the list slides with the field, so every one of the 109 field pages is reachable from the others. All of them.