UMSTEAD
Lease 1001115879 · Stafford County, Kansas · NESWSW Sec 28 T21S R12W · DOR 107036
Oil1965–20254 wells
Operator
Hartman Oil Co., Inc.
Cumulative (state figure)
108,987.21 bbl
First production
1965
Last production
2025
Location (PLSS)
NESWSW Sec 28 T21S R12W
Monthly oil production
249 months filed with the Kansas Geological Survey, Jan 1980 to Nov 2025. 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
46,642.20 bbl
Months filed
249
Most wells in a month
3
This lease was producing before 1980, and the series begins in January 1980. The total above covers the months shown, not the life of the lease; the state's own cumulative is 108,987.21 bbl.
| Month | Oil (bbl) | Wells |
|---|---|---|
| Nov 2025 | 166.63 | 2 |
| May 2025 | 151.43 | 2 |
| Nov 2024 | 148.54 | 2 |
| Jun 2024 | 149.14 | 2 |
| Dec 2023 | 160.24 | 2 |
| Jul 2023 | 159.29 | 2 |
| Feb 2023 | 165.23 | 2 |
| Aug 2022 | 160.88 | 2 |
| Feb 2022 | 164.37 | 2 |
| Sep 2021 | 156.37 | 2 |
| Apr 2021 | 160.30 | 2 |
| Dec 2020 | 152.38 | 2 |
| Nov 2019 | 108.17 | 2 |
| May 2019 | 147.78 | 2 |
| Sep 2018 | 144.87 | 2 |
| Mar 2018 | 153.25 | 2 |
| Jul 2017 | 156.75 | 2 |
| Dec 2016 | 147.14 | 2 |
| Jun 2016 | 150.16 | 2 |
| Dec 2015 | 152.95 | 2 |
| Jun 2015 | 157.04 | 2 |
| Dec 2014 | 151.32 | 2 |
| Jun 2014 | 159.52 | 2 |
| Jan 2014 | 147.50 | 2 |
| Aug 2013 | 150.42 | 2 |
| Mar 2013 | 147.63 | 2 |
| Sep 2012 | 150.46 | 2 |
| May 2012 | 151.33 | 2 |
| Dec 2011 | 149.91 | 2 |
| Jul 2011 | 156.37 | 2 |
| Feb 2011 | 162.37 | 2 |
| Sep 2010 | 148.79 | 2 |
| May 2010 | 157.81 | 2 |
| Dec 2009 | 167.71 | 2 |
| Jul 2009 | 155.49 | 2 |
| Feb 2009 | 160.31 | 2 |
| Sep 2008 | 164.43 | 2 |
| May 2008 | 146.25 | 2 |
| Apr 2008 | 17.42 | 2 |
| Dec 2007 | 155.13 | 2 |
| Aug 2007 | 154.04 | 2 |
| Apr 2007 | 153.14 | 2 |
| Nov 2006 | 160.74 | 2 |
| Jul 2006 | 147.14 | 2 |
| Mar 2006 | 154.73 | 2 |
| Nov 2005 | 153.59 | 2 |
| Jul 2005 | 150.37 | 2 |
| Mar 2005 | 144.83 | 2 |
| Dec 2004 | 161.68 | 2 |
| Aug 2004 | 153.35 | 2 |
| Apr 2004 | 147.62 | 2 |
| Jan 2004 | 154.86 | 2 |
| Oct 2003 | 156.18 | 2 |
| Jul 2003 | 151.74 | 2 |
| Apr 2003 | 143.78 | 2 |
| Dec 2002 | 153.24 | 2 |
| Aug 2002 | 146.53 | 2 |
| May 2002 | 158.31 | 2 |
| Jan 2002 | 161.86 | 2 |
| Sep 2001 | 157.15 | 2 |
| Jun 2001 | 154.78 | 2 |
| Mar 2001 | 160.87 | 2 |
| Dec 2000 | 166.67 | 2 |
| Aug 2000 | 154.72 | 2 |
| May 2000 | 156.40 | 2 |
| Feb 2000 | 158.65 | 2 |
| Nov 1999 | 157.77 | 2 |
| Aug 1999 | 157.60 | 2 |
| Jul 1999 | 162.39 | 2 |
| Apr 1999 | 162.30 | 2 |
| Jan 1999 | 155.51 | 2 |
| Oct 1998 | 155.81 | 3 |
| Aug 1998 | 158.77 | 3 |
| May 1998 | 129.65 | 3 |
| Jan 1998 | 155.81 | 3 |
| Oct 1997 | 165.13 | 3 |
| Jun 1997 | 158.58 | 3 |
| May 1997 | 8.00 | 3 |
| Apr 1997 | 161.18 | 3 |
| Jan 1997 | 129.21 | 3 |
| Oct 1996 | 164.58 | 3 |
| Jul 1996 | 310.42 | 3 |
| Mar 1996 | 145.97 | 3 |
| Feb 1996 | 158.48 | 3 |
| Dec 1995 | 158.00 | 1 |
| Nov 1995 | 163.00 | 1 |
| Oct 1995 | 165.00 | 1 |
| Sep 1995 | 159.00 | 1 |
| Jul 1995 | 328.00 | 1 |
| Apr 1995 | 171.00 | 1 |
| Feb 1995 | 168.00 | 1 |
| Jan 1995 | 171.00 | 1 |
| Oct 1994 | 171.00 | 1 |
| Sep 1994 | 164.00 | 1 |
| Jul 1994 | 168.00 | 1 |
| Jun 1994 | 169.00 | 1 |
| May 1994 | 168.00 | 1 |
| Mar 1994 | 170.00 | 1 |
| Jan 1994 | 173.00 | 1 |
| Dec 1993 | 162.00 | 1 |
| Nov 1993 | 170.00 | 1 |
| Sep 1993 | 166.00 | 1 |
| Jul 1993 | 160.00 | 1 |
| Jun 1993 | 164.00 | 1 |
| Apr 1993 | 170.00 | 1 |
| Mar 1993 | 325.00 | 1 |
| Dec 1992 | 119.00 | 1 |
| Nov 1992 | 169.00 | 1 |
| Oct 1992 | 171.00 | 1 |
| Aug 1992 | 159.00 | 1 |
| Jul 1992 | 161.00 | 1 |
| Jun 1992 | 167.00 | 1 |
| May 1992 | 170.00 | 1 |
| Apr 1992 | 168.00 | 1 |
| Feb 1992 | 154.00 | 1 |
| Jan 1992 | 168.00 | 1 |
| Dec 1991 | 171.00 | 1 |
| Nov 1991 | 171.00 | 1 |
| Oct 1991 | 171.00 | 1 |
| Sep 1991 | 168.00 | 1 |
| Jul 1991 | 164.00 | 1 |
| Jun 1991 | 164.00 | 1 |
| May 1991 | 163.00 | 1 |
| Apr 1991 | 162.00 | 1 |
| Mar 1991 | 130.00 | 1 |
| Feb 1991 | 331.00 | 1 |
| Dec 1990 | 134.00 | 1 |
| Nov 1990 | 177.00 | 1 |
| Oct 1990 | 163.00 | 1 |
| Sep 1990 | 169.00 | 1 |
| Aug 1990 | 168.00 | 1 |
| Jul 1990 | 166.00 | 1 |
| Jun 1990 | 114.00 | 1 |
| May 1990 | 165.00 | 1 |
| Apr 1990 | 171.00 | 1 |
| Mar 1990 | 167.00 | 1 |
| Feb 1990 | 170.00 | 1 |
| Jan 1990 | 171.00 | 1 |
| Dec 1989 | 169.00 | 1 |
| Nov 1989 | 170.00 | 1 |
| Oct 1989 | 170.00 | 1 |
| Sep 1989 | 166.00 | 1 |
| Aug 1989 | 160.00 | 1 |
| Jun 1989 | 345.00 | 1 |
| May 1989 | 164.00 | 1 |
| Apr 1989 | 168.00 | 1 |
| Mar 1989 | 170.00 | 1 |
| Feb 1989 | 169.00 | 1 |
| Jan 1989 | 169.00 | 1 |
| Dec 1988 | 170.00 | 1 |
| Nov 1988 | 163.00 | 1 |
| Sep 1988 | 169.00 | 1 |
| Aug 1988 | 168.00 | 1 |
| Jul 1988 | 168.00 | 1 |
| Jun 1988 | 167.00 | 1 |
| May 1988 | 334.00 | 1 |
| Apr 1988 | 166.00 | 1 |
| Mar 1988 | 168.00 | 1 |
| Feb 1988 | 172.00 | 1 |
| Dec 1987 | 342.00 | 1 |
| Nov 1987 | 173.00 | 1 |
| Oct 1987 | 170.00 | 1 |
| Sep 1987 | 165.00 | 1 |
| Aug 1987 | 168.00 | 1 |
| Jul 1987 | 165.00 | 1 |
| Jun 1987 | 167.00 | 1 |
| May 1987 | 169.00 | 1 |
| Apr 1987 | 340.00 | 1 |
| Feb 1987 | 338.00 | 1 |
| Jan 1987 | 329.00 | 1 |
| Nov 1986 | 165.00 | 1 |
| Oct 1986 | 335.00 | 1 |
| Sep 1986 | 169.00 | 1 |
| Aug 1986 | 166.00 | 1 |
| Jul 1986 | 167.00 | 1 |
| Jun 1986 | 326.00 | 1 |
| May 1986 | 165.00 | 1 |
| Apr 1986 | 161.00 | 1 |
| Mar 1986 | 163.00 | 1 |
| Feb 1986 | 160.00 | 1 |
| Jan 1986 | 339.00 | 1 |
| Dec 1985 | 169.00 | 1 |
| Oct 1985 | 170.00 | 1 |
| Sep 1985 | 168.00 | 1 |
| Aug 1985 | 336.00 | 1 |
| Jul 1985 | 162.00 | 1 |
| Jun 1985 | 162.00 | 1 |
| May 1985 | 164.00 | 1 |
| Apr 1985 | 329.00 | 1 |
| Mar 1985 | 166.00 | 1 |
| Feb 1985 | 169.00 | 1 |
| Jan 1985 | 168.00 | 1 |
| Dec 1984 | 163.00 | 1 |
| Nov 1984 | 323.00 | 1 |
| Sep 1984 | 167.00 | 1 |
| Aug 1984 | 160.00 | 1 |
| Jul 1984 | 161.00 | 1 |
| Jun 1984 | 165.00 | 1 |
| May 1984 | 168.00 | 1 |
| Apr 1984 | 164.00 | 1 |
| Mar 1984 | 334.00 | 1 |
| Feb 1984 | 168.00 | 1 |
| Jan 1984 | 171.00 | 1 |
| Dec 1983 | 169.00 | 1 |
| Nov 1983 | 171.00 | 1 |
| Oct 1983 | 333.00 | 1 |
| Aug 1983 | 332.00 | 1 |
| Jul 1983 | 169.00 | 1 |
| Jun 1983 | 165.00 | 1 |
| May 1983 | 165.00 | 1 |
| Apr 1983 | 169.00 | 1 |
| Mar 1983 | 177.00 | 1 |
| Feb 1983 | 171.00 | 1 |
| Jan 1983 | 339.00 | 1 |
| Nov 1982 | 165.00 | 1 |
| Oct 1982 | 164.00 | 1 |
| Sep 1982 | 165.00 | 1 |
| Aug 1982 | 327.00 | 1 |
| Jul 1982 | 170.00 | 1 |
| Jun 1982 | 169.00 | 1 |
| May 1982 | 322.00 | 1 |
| Apr 1982 | 169.00 | 1 |
| Mar 1982 | 333.00 | 1 |
| Feb 1982 | 164.00 | 1 |
| Jan 1982 | 163.00 | 1 |
| Dec 1981 | 345.00 | 1 |
| Nov 1981 | 170.00 | 1 |
| Oct 1981 | 329.00 | 1 |
| Sep 1981 | 165.00 | 1 |
| Aug 1981 | 327.00 | 1 |
| Jul 1981 | 167.00 | 1 |
| Jun 1981 | 336.00 | 1 |
| May 1981 | 333.00 | 1 |
| Apr 1981 | 340.00 | 1 |
| Mar 1981 | 172.00 | 1 |
| Feb 1981 | 338.00 | 1 |
| Jan 1981 | 342.00 | 1 |
| Dec 1980 | 171.00 | 1 |
| Nov 1980 | 330.00 | 1 |
| Oct 1980 | 340.00 | 1 |
| Sep 1980 | 327.00 | 1 |
| Aug 1980 | 164.00 | 1 |
| Jul 1980 | 327.00 | 1 |
| Jun 1980 | 320.00 | 1 |
| May 1980 | 164.00 | 1 |
| Apr 1980 | 331.00 | 1 |
| Mar 1980 | 329.00 | 1 |
| Feb 1980 | 316.00 | 1 |
| Jan 1980 | 328.00 | 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
4 wells the state's well register assigns to this lease. Every one has a page.
| Well | No. | Operator | Status |
|---|---|---|---|
| Mary Umstead | 2 | unavailable | Recompleted |
| UMSTEAD | 2 | Hartman Oil Co., Inc. | Producing |
| Umstead | 3 | Hartman Oil Co., Inc. | Producing |
| Umstead | 1 | Peak Oil Company LLC | Plugged and Abandoned |
Location
38.190560, -98.652803 · NESWSW Sec 28 T21S R12W
Kansas Geological Survey data, corpus built 2026-09-07. Lease 1001115879. The state’s own record.