SIEFKES EILERT 'A'
Lease 1001129491 · Stafford County, Kansas · Sec 3 T22S R12W · DOR 116235
Oil1981–1992
Operator
Vonfeldt Oil Operations, Inc.
Cumulative (state figure)
35,310 bbl
First production
1981
Last production
1992
Location (PLSS)
Sec 3 T22S R12W
Monthly oil production
105 months filed with the Kansas Geological Survey, Aug 1981 to Feb 1992. Volumes are bbl at lease level — a lease can cover many wells, so this is not a well's output.
Total over the months shown
35,310 bbl
Months filed
105
Most wells in a month
3
| Month | Oil (bbl) | Wells |
|---|---|---|
| Feb 1992 | 331 | 3 |
| Dec 1991 | 156 | 3 |
| Nov 1991 | 161 | 3 |
| Oct 1991 | 160 | 3 |
| Sep 1991 | 154 | 3 |
| Aug 1991 | 121 | 3 |
| Jul 1991 | 163 | 3 |
| Jun 1991 | 165 | 3 |
| May 1991 | 172 | 3 |
| Apr 1991 | 334 | 3 |
| Mar 1991 | 149 | 3 |
| Feb 1991 | 168 | 3 |
| Jan 1991 | 171 | 3 |
| Dec 1990 | 173 | 3 |
| Nov 1990 | 173 | 3 |
| Oct 1990 | 159 | 3 |
| Sep 1990 | 171 | 3 |
| Aug 1990 | 163 | 3 |
| Jul 1990 | 171 | 3 |
| Jun 1990 | 167 | 3 |
| May 1990 | 339 | 3 |
| Apr 1990 | 169 | 3 |
| Mar 1990 | 172 | 3 |
| Feb 1990 | 170 | 3 |
| Jan 1990 | 176 | 3 |
| Dec 1989 | 168 | 3 |
| Nov 1989 | 163 | 3 |
| Oct 1989 | 335 | 3 |
| Sep 1989 | 159 | 3 |
| Aug 1989 | 171 | 3 |
| Nov 1988 | 345 | 3 |
| Sep 1987 | 343 | 3 |
| Aug 1987 | 498 | 3 |
| Jul 1987 | 674 | 3 |
| Jun 1987 | 493 | 3 |
| May 1987 | 671 | 3 |
| Apr 1987 | 677 | 3 |
| Mar 1987 | 682 | 3 |
| Feb 1987 | 516 | 3 |
| Jan 1987 | 670 | 3 |
| Dec 1986 | 172 | 3 |
| Nov 1986 | 115 | 3 |
| Oct 1986 | 166 | 3 |
| Sep 1986 | 162 | 3 |
| Aug 1986 | 161 | 3 |
| Jul 1986 | 164 | 3 |
| Jun 1986 | 168 | 3 |
| May 1986 | 165 | 3 |
| Apr 1986 | 169 | 3 |
| Mar 1986 | 109 | 3 |
| Feb 1986 | 217 | 3 |
| Jan 1986 | 229 | 3 |
| Dec 1985 | 222 | 3 |
| Nov 1985 | 234 | 3 |
| Oct 1985 | 264 | 3 |
| Sep 1985 | 233 | 3 |
| Aug 1985 | 269 | 3 |
| Jul 1985 | 265 | 3 |
| Jun 1985 | 323 | 3 |
| May 1985 | 313 | 3 |
| Apr 1985 | 184 | 3 |
| Mar 1985 | 297 | 3 |
| Feb 1985 | 304 | 3 |
| Jan 1985 | 199 | 3 |
| Dec 1984 | 309 | 3 |
| Nov 1984 | 297 | 3 |
| Oct 1984 | 410 | 3 |
| Sep 1984 | 285 | 3 |
| Aug 1984 | 395 | 3 |
| Jul 1984 | 327 | 3 |
| Jun 1984 | 396 | 3 |
| May 1984 | 356 | 3 |
| Apr 1984 | 319 | 3 |
| Mar 1984 | 374 | 3 |
| Feb 1984 | 340 | 3 |
| Jan 1984 | 412 | 3 |
| Dec 1983 | 437 | 3 |
| Nov 1983 | 359 | 3 |
| Oct 1983 | 352 | 3 |
| Sep 1983 | 318 | 3 |
| Aug 1983 | 390 | 3 |
| Jul 1983 | 352 | 3 |
| Jun 1983 | 387 | 3 |
| May 1983 | 463 | 3 |
| Apr 1983 | 387 | 3 |
| Mar 1983 | 468 | 3 |
| Feb 1983 | 472 | 3 |
| Jan 1983 | 637 | 3 |
| Dec 1982 | 401 | 3 |
| Nov 1982 | 502 | 3 |
| Oct 1982 | 427 | 3 |
| Sep 1982 | 455 | 3 |
| Aug 1982 | 445 | 3 |
| Jul 1982 | 491 | 3 |
| Jun 1982 | 437 | 3 |
| May 1982 | 496 | 3 |
| Apr 1982 | 553 | 3 |
| Mar 1982 | 412 | 3 |
| Feb 1982 | 436 | 3 |
| Jan 1982 | 526 | 3 |
| Dec 1981 | 642 | 3 |
| Nov 1981 | 505 | 3 |
| Oct 1981 | 680 | 3 |
| Sep 1981 | 638 | 3 |
| Aug 1981 | 1,745 | 3 |
Lease-level volumes as filed with the Kansas Geological Survey. A blank well count is a month the state filed no count for, not a month with no wells.
Wells on this lease
The state’s well register assigns no well to this lease. 23,174 of 98,639 Kansas leases are in that position — a lease is a production unit, and the register does not always name the holes under it.
Location
38.165836, -98.628823 · Sec 3 T22S R12W
Kansas Geological Survey data, corpus built 2026-09-07. Lease 1001129491. The state’s own record.