DEFOREST (C)
Lease 1001126993 · Marion County, Kansas · SENESW Sec 21 T21S R4E · DOR 113751
Oil1980–20263 wells
Operator
Lachenmayr Oil LLC
Cumulative (state figure)
28,925.43 bbl
First production
1980
Last production
2026
Location (PLSS)
SENESW Sec 21 T21S R4E
Monthly oil production
149 months filed with the Kansas Geological Survey, Oct 1980 to Feb 2026. 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
28,925.40 bbl
Months filed
149
Most wells in a month
3
| Month | Oil (bbl) | Wells |
|---|---|---|
| Feb 2026 | 161.22 | 1 |
| Nov 2025 | 168.59 | 1 |
| Aug 2025 | 163.77 | 1 |
| Jan 2025 | 162.91 | 1 |
| Sep 2024 | 158.62 | 1 |
| Jun 2024 | 161.55 | 1 |
| Aug 2023 | 138.15 | 1 |
| May 2023 | 157.71 | 1 |
| Jan 2023 | 158.02 | 1 |
| Aug 2022 | 162.51 | 1 |
| Apr 2022 | 162.74 | 1 |
| Jan 2022 | 162.16 | 1 |
| Aug 2021 | 158.20 | 1 |
| May 2021 | 161.09 | 1 |
| Feb 2021 | 165.62 | 1 |
| Nov 2020 | 163.24 | 1 |
| Feb 2020 | 163.77 | 1 |
| Oct 2018 | 132.35 | 1 |
| May 2018 | 165.68 | 1 |
| Dec 2017 | 101.87 | 1 |
| Apr 2017 | 159.82 | 1 |
| Jul 2016 | 162.51 | 1 |
| Apr 2016 | 165.68 | 1 |
| Aug 2015 | 167.29 | 1 |
| Jan 2015 | 165.04 | 1 |
| Sep 2014 | 165.41 | 1 |
| Jul 2014 | 161.64 | 1 |
| Mar 2012 | 32.47 | 1 |
| Jun 2011 | 75.56 | 1 |
| Nov 2009 | 105.51 | 1 |
| Aug 2008 | 168.74 | 1 |
| Jan 2008 | 96.43 | 1 |
| Aug 2007 | 165.02 | 1 |
| Mar 2007 | 87.83 | 1 |
| Aug 2006 | 107.83 | 1 |
| Apr 2006 | 86.04 | 1 |
| Dec 2005 | 169.13 | 1 |
| Jun 2005 | 167.71 | 1 |
| Dec 2004 | 163.02 | 1 |
| Jul 2004 | 164.77 | 2 |
| Jan 2004 | 164.74 | 2 |
| Sep 2003 | 162.49 | 2 |
| May 2003 | 161.42 | 2 |
| Jan 2002 | 166.96 | 2 |
| Jul 2001 | 162.70 | 2 |
| Feb 2001 | 163.92 | 2 |
| Aug 2000 | 157.97 | 2 |
| Apr 2000 | 170.74 | 2 |
| Nov 1999 | 161.44 | 2 |
| May 1999 | 159.51 | 2 |
| Nov 1998 | 127.10 | 2 |
| Jun 1998 | 165.44 | 2 |
| Jan 1998 | 162.96 | 2 |
| Jun 1997 | 165.96 | 2 |
| Feb 1997 | 161.20 | 2 |
| Aug 1996 | 162.70 | 2 |
| Mar 1996 | 162.96 | 2 |
| Oct 1995 | 166.00 | 3 |
| May 1995 | 160.00 | 3 |
| Dec 1994 | 163.00 | 3 |
| Aug 1994 | 159.00 | 3 |
| Apr 1994 | 164.00 | 3 |
| Dec 1993 | 165.00 | 3 |
| Aug 1993 | 162.00 | 3 |
| May 1993 | 165.00 | 3 |
| Jan 1993 | 165.00 | 3 |
| Oct 1992 | 164.00 | 3 |
| Jul 1992 | 163.00 | 3 |
| Apr 1992 | 165.00 | 3 |
| Jan 1992 | 165.00 | 3 |
| Oct 1991 | 163.00 | 3 |
| Jul 1991 | 162.00 | 3 |
| May 1991 | 164.00 | 3 |
| Jan 1991 | 158.00 | 3 |
| Oct 1990 | 160.00 | 3 |
| Jul 1990 | 160.00 | 3 |
| May 1990 | 164.00 | 3 |
| Mar 1990 | 167.00 | 3 |
| Dec 1989 | 168.00 | 3 |
| Sep 1989 | 163.00 | 3 |
| Jun 1989 | 163.00 | 3 |
| Mar 1989 | 169.00 | 3 |
| Jan 1989 | 163.00 | 3 |
| Oct 1988 | 159.00 | 3 |
| Aug 1988 | 159.00 | 3 |
| May 1988 | 160.00 | 3 |
| Mar 1988 | 163.00 | 3 |
| Jan 1988 | 165.00 | 3 |
| Nov 1987 | 167.00 | 3 |
| Oct 1987 | 164.00 | 3 |
| Sep 1987 | 164.00 | 3 |
| Aug 1987 | 160.00 | 3 |
| Jul 1987 | 325.00 | 3 |
| Jun 1987 | 325.00 | 3 |
| May 1987 | 165.00 | 3 |
| Apr 1987 | 324.00 | 3 |
| Mar 1987 | 165.00 | 3 |
| Feb 1987 | 327.00 | 3 |
| Jan 1987 | 167.00 | 3 |
| Dec 1986 | 336.00 | 3 |
| Nov 1986 | 334.00 | 3 |
| Oct 1986 | 494.00 | 3 |
| Sep 1986 | 327.00 | 3 |
| Aug 1986 | 321.00 | 3 |
| Jul 1986 | 320.00 | 3 |
| Jun 1986 | 323.00 | 3 |
| May 1986 | 327.00 | 3 |
| Apr 1986 | 467.00 | 3 |
| Mar 1986 | 303.00 | 3 |
| Feb 1986 | 456.00 | 3 |
| Jan 1986 | 304.00 | 3 |
| Dec 1985 | 464.00 | 3 |
| Nov 1985 | 320.00 | 3 |
| Oct 1985 | 455.00 | 3 |
| Sep 1985 | 309.00 | 3 |
| Aug 1985 | 297.00 | 3 |
| Jul 1985 | 447.00 | 3 |
| Jun 1985 | 301.00 | 3 |
| May 1985 | 301.00 | 3 |
| Mar 1985 | 151.00 | 3 |
| Dec 1984 | 153.00 | 1 |
| Aug 1984 | 151.00 | 1 |
| Jun 1984 | 150.00 | 1 |
| Feb 1984 | 152.00 | 1 |
| Dec 1983 | 153.00 | 1 |
| Nov 1983 | 154.00 | 1 |
| Sep 1983 | 151.00 | 1 |
| Jul 1983 | 151.00 | 1 |
| Apr 1983 | 152.00 | 1 |
| Jan 1983 | 153.00 | 1 |
| Nov 1982 | 151.00 | 1 |
| Aug 1982 | 150.00 | 1 |
| Jun 1982 | 150.00 | 1 |
| Apr 1982 | 152.00 | 1 |
| Mar 1982 | 143.00 | 1 |
| Jan 1982 | 156.00 | 1 |
| Nov 1981 | 152.00 | 1 |
| Oct 1981 | 151.00 | 1 |
| Sep 1981 | 149.00 | 1 |
| Aug 1981 | 148.00 | 1 |
| Jun 1981 | 148.00 | 1 |
| May 1981 | 149.00 | 1 |
| Apr 1981 | 151.00 | 1 |
| Mar 1981 | 151.00 | 1 |
| Feb 1981 | 306.00 | 1 |
| Jan 1981 | 153.00 | 1 |
| Dec 1980 | 460.00 | 1 |
| Nov 1980 | 457.00 | 1 |
| Oct 1980 | 455.00 | 1 |
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
3 wells the state's well register assigns to this lease. Every one has a page.
| Well | No. | Operator | Status |
|---|---|---|---|
| DEFOREST 'C' | 1 | Lachenmayr Oil LLC | Producing |
| DEFOREST 'C' | 2 | Drillers & Producers, Inc. | Plugged and Abandoned |
| DEFOREST 'C' | 3 | Sierra Drilling Company | Plugged and Abandoned |
Location
38.206788, -96.997399 · SENESW Sec 21 T21S R4E
Kansas Geological Survey data, corpus built 2026-09-07. Lease 1001126993. The state’s own record.