O'BRIEN B-P
Lease 1001119298 · Ness County, Kansas · NWNWSW Sec 7 T20S R21W · DOR 109394
Oil1964–20266 wells
Operator
Ritchie Exploration, Inc.
Cumulative (state figure)
256,729.93 bbl
First production
1964
Last production
2026
Location (PLSS)
NWNWSW Sec 7 T20S R21W
Monthly oil production
435 months filed with the Kansas Geological Survey, Jan 1980 to Apr 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
103,617.90 bbl
Months filed
435
Most wells in a month
4
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 256,729.93 bbl.
| Month | Oil (bbl) | Wells |
|---|---|---|
| Apr 2026 | 157.14 | 1 |
| Feb 2026 | 154.94 | 1 |
| Jan 2026 | 174.14 | 1 |
| Dec 2025 | 326.70 | 1 |
| Oct 2025 | 176.74 | 1 |
| Sep 2025 | 183.25 | 1 |
| Aug 2025 | 157.52 | 1 |
| Jun 2025 | 164.90 | 1 |
| May 2025 | 160.20 | 1 |
| Apr 2025 | 158.23 | 1 |
| Mar 2025 | 159.96 | 1 |
| Feb 2025 | 155.47 | 1 |
| Jan 2025 | 320.74 | 1 |
| Dec 2024 | 157.82 | 1 |
| Nov 2024 | 165.55 | 1 |
| Oct 2024 | 167.28 | 1 |
| Sep 2024 | 323.85 | 1 |
| Aug 2024 | 158.80 | 1 |
| Jul 2024 | 163.75 | 1 |
| Jun 2024 | 163.48 | 1 |
| May 2024 | 161.55 | 1 |
| Apr 2024 | 326.97 | 1 |
| Mar 2024 | 163.71 | 1 |
| Feb 2024 | 162.47 | 1 |
| Jan 2024 | 331.62 | 1 |
| Dec 2023 | 158.81 | 1 |
| Nov 2023 | 163.54 | 1 |
| Oct 2023 | 326.65 | 1 |
| Sep 2023 | 162.09 | 1 |
| Aug 2023 | 164.00 | 1 |
| Jul 2023 | 322.90 | 1 |
| Jun 2023 | 160.70 | 1 |
| May 2023 | 318.51 | 1 |
| Apr 2023 | 161.76 | 1 |
| Mar 2023 | 331.31 | 1 |
| Feb 2023 | 158.33 | 1 |
| Jan 2023 | 351.38 | 1 |
| Dec 2022 | 160.00 | 1 |
| Nov 2022 | 324.92 | 1 |
| Oct 2022 | 164.21 | 1 |
| Sep 2022 | 163.56 | 1 |
| Aug 2022 | 161.54 | 1 |
| Jul 2022 | 163.81 | 1 |
| Jun 2022 | 327.03 | 1 |
| May 2022 | 164.04 | 1 |
| Apr 2022 | 162.16 | 1 |
| Mar 2022 | 165.40 | 1 |
| Feb 2022 | 163.46 | 1 |
| Jan 2022 | 162.83 | 1 |
| Dec 2021 | 163.96 | 1 |
| Nov 2021 | 164.77 | 1 |
| Oct 2021 | 166.77 | 1 |
| Sep 2021 | 166.40 | 1 |
| Aug 2021 | 161.68 | 1 |
| Jul 2021 | 181.40 | 1 |
| Jun 2021 | 162.80 | 1 |
| May 2021 | 325.86 | 1 |
| Apr 2021 | 163.29 | 1 |
| Mar 2021 | 166.86 | 1 |
| Feb 2021 | 159.44 | 1 |
| Jan 2021 | 171.10 | 1 |
| Dec 2020 | 339.77 | 1 |
| Nov 2020 | 166.96 | 1 |
| Oct 2020 | 332.89 | 1 |
| Sep 2020 | 166.75 | 1 |
| Aug 2020 | 341.87 | 1 |
| Jul 2020 | 164.09 | 1 |
| May 2020 | 167.29 | 1 |
| Mar 2020 | 332.70 | 1 |
| Feb 2020 | 165.75 | 1 |
| Jan 2020 | 330.11 | 1 |
| Dec 2019 | 307.93 | 1 |
| Nov 2019 | 172.94 | 1 |
| Oct 2019 | 339.04 | 1 |
| Sep 2019 | 342.43 | 1 |
| Aug 2019 | 337.24 | 1 |
| Jul 2019 | 336.76 | 1 |
| Jun 2019 | 337.48 | 1 |
| May 2019 | 175.84 | 1 |
| Apr 2019 | 353.60 | 1 |
| Mar 2019 | 347.03 | 1 |
| Feb 2019 | 347.45 | 1 |
| Jan 2019 | 172.61 | 1 |
| Dec 2018 | 363.82 | 1 |
| Nov 2018 | 487.76 | 1 |
| Oct 2018 | 345.63 | 1 |
| Sep 2018 | 336.47 | 1 |
| Aug 2018 | 348.74 | 1 |
| Jul 2018 | 340.49 | 1 |
| Jun 2018 | 348.49 | 1 |
| May 2018 | 355.52 | 1 |
| Mar 2018 | 178.56 | 1 |
| Feb 2018 | 180.18 | 1 |
| Jan 2018 | 177.74 | 1 |
| Nov 2017 | 179.04 | 1 |
| Oct 2017 | 176.70 | 1 |
| Sep 2017 | 178.85 | 1 |
| Aug 2017 | 169.90 | 1 |
| Jul 2017 | 172.65 | 1 |
| Jun 2017 | 196.89 | 1 |
| May 2017 | 357.41 | 1 |
| Apr 2017 | 181.98 | 1 |
| Mar 2017 | 176.04 | 1 |
| Feb 2017 | 171.27 | 1 |
| Jan 2017 | 350.94 | 1 |
| Dec 2016 | 180.79 | 1 |
| Nov 2016 | 173.24 | 1 |
| Oct 2016 | 360.82 | 1 |
| Sep 2016 | 175.98 | 1 |
| Aug 2016 | 330.45 | 1 |
| Jul 2016 | 168.78 | 1 |
| Jun 2016 | 520.65 | 1 |
| May 2016 | 336.89 | 1 |
| Apr 2016 | 335.63 | 1 |
| Mar 2016 | 346.92 | 1 |
| Feb 2016 | 187.42 | 1 |
| Jan 2016 | 342.16 | 1 |
| Dec 2015 | 172.95 | 1 |
| Nov 2015 | 344.96 | 1 |
| Oct 2015 | 341.84 | 1 |
| Sep 2015 | 335.35 | 1 |
| Aug 2015 | 323.20 | 1 |
| Jul 2015 | 335.96 | 1 |
| Jun 2015 | 177.18 | 1 |
| May 2015 | 161.48 | 1 |
| Apr 2015 | 329.26 | 1 |
| Mar 2015 | 352.15 | 1 |
| Feb 2015 | 178.66 | 1 |
| Jan 2015 | 348.46 | 1 |
| Dec 2014 | 338.95 | 1 |
| Nov 2014 | 337.88 | 1 |
| Oct 2014 | 342.59 | 1 |
| Sep 2014 | 336.68 | 1 |
| Aug 2014 | 502.95 | 1 |
| Jul 2014 | 331.19 | 1 |
| Jun 2014 | 333.29 | 1 |
| May 2014 | 486.15 | 1 |
| Apr 2014 | 333.23 | 1 |
| Mar 2014 | 500.56 | 1 |
| Feb 2014 | 340.31 | 1 |
| Jan 2014 | 513.04 | 1 |
| Dec 2013 | 513.37 | 1 |
| Nov 2013 | 345.45 | 1 |
| Oct 2013 | 493.50 | 1 |
| Sep 2013 | 500.07 | 1 |
| Aug 2013 | 333.47 | 1 |
| Jul 2013 | 538.90 | 1 |
| Jun 2013 | 635.26 | 1 |
| May 2013 | 672.80 | 1 |
| Apr 2013 | 501.41 | 1 |
| Mar 2013 | 830.48 | 1 |
| Jan 2013 | 713.44 | 1 |
| Dec 2012 | 505.26 | 1 |
| Nov 2012 | 853.55 | 1 |
| Oct 2012 | 679.73 | 1 |
| Sep 2012 | 685.25 | 1 |
| Aug 2012 | 332.97 | 1 |
| Jul 2012 | 159.07 | 1 |
| May 2012 | 162.65 | 1 |
| Apr 2012 | 166.48 | 1 |
| Mar 2012 | 177.48 | 1 |
| Feb 2012 | 174.68 | 1 |
| Jan 2012 | 166.68 | 1 |
| Jul 2011 | 55.11 | 1 |
| Mar 2011 | 169.40 | 1 |
| Jan 2011 | 177.52 | 1 |
| Nov 2010 | 175.79 | 1 |
| Sep 2010 | 171.02 | 1 |
| Aug 2010 | 163.01 | 1 |
| Jun 2010 | 171.08 | 1 |
| Apr 2010 | 170.43 | 1 |
| Mar 2010 | 176.42 | 1 |
| Jan 2010 | 186.01 | 1 |
| Nov 2009 | 190.75 | 1 |
| Sep 2009 | 183.94 | 1 |
| Aug 2009 | 171.61 | 1 |
| Jun 2009 | 170.55 | 1 |
| May 2009 | 167.79 | 1 |
| Mar 2009 | 181.45 | 1 |
| Feb 2009 | 173.36 | 1 |
| Dec 2008 | 179.51 | 1 |
| Nov 2008 | 175.00 | 1 |
| Sep 2008 | 167.10 | 1 |
| Aug 2008 | 168.92 | 1 |
| Jun 2008 | 183.75 | 1 |
| May 2008 | 248.22 | 1 |
| Mar 2008 | 176.37 | 1 |
| Feb 2008 | 181.51 | 1 |
| Jan 2008 | 182.17 | 1 |
| Nov 2007 | 177.78 | 1 |
| Oct 2007 | 180.41 | 1 |
| Aug 2007 | 174.22 | 1 |
| Jul 2007 | 176.84 | 1 |
| Jun 2007 | 179.83 | 1 |
| Apr 2007 | 182.73 | 1 |
| Mar 2007 | 176.91 | 1 |
| Feb 2007 | 186.05 | 1 |
| Jan 2007 | 175.11 | 1 |
| Nov 2006 | 179.39 | 1 |
| Oct 2006 | 176.44 | 1 |
| Sep 2006 | 178.77 | 1 |
| Aug 2006 | 186.39 | 1 |
| Jun 2006 | 176.55 | 1 |
| May 2006 | 177.97 | 1 |
| Apr 2006 | 167.13 | 1 |
| Mar 2006 | 186.25 | 1 |
| Feb 2006 | 165.86 | 1 |
| Jan 2006 | 181.53 | 1 |
| Dec 2005 | 178.56 | 1 |
| Nov 2005 | 181.81 | 1 |
| Oct 2005 | 175.70 | 1 |
| Sep 2005 | 178.20 | 1 |
| Aug 2005 | 170.95 | 1 |
| Jul 2005 | 167.24 | 1 |
| May 2005 | 177.55 | 1 |
| Mar 2005 | 185.63 | 1 |
| Feb 2005 | 174.59 | 1 |
| Dec 2004 | 182.34 | 1 |
| Oct 2004 | 179.39 | 1 |
| Sep 2004 | 170.12 | 1 |
| Jul 2004 | 175.20 | 1 |
| Jun 2004 | 180.09 | 1 |
| Apr 2004 | 171.44 | 1 |
| Mar 2004 | 167.63 | 1 |
| Jan 2004 | 177.98 | 1 |
| Dec 2003 | 171.74 | 1 |
| Oct 2003 | 184.80 | 1 |
| Sep 2003 | 169.32 | 1 |
| Jul 2003 | 163.07 | 1 |
| Jun 2003 | 173.56 | 1 |
| Apr 2003 | 178.72 | 1 |
| Mar 2003 | 173.45 | 1 |
| Jan 2003 | 181.48 | 1 |
| Dec 2002 | 164.98 | 1 |
| Nov 2002 | 173.58 | 1 |
| Sep 2002 | 181.82 | 1 |
| Aug 2002 | 177.72 | 1 |
| Jun 2002 | 173.61 | 1 |
| May 2002 | 175.82 | 1 |
| Mar 2002 | 174.96 | 1 |
| Feb 2002 | 169.44 | 1 |
| Jan 2002 | 197.80 | 1 |
| Nov 2001 | 196.37 | 1 |
| Sep 2001 | 191.61 | 1 |
| Aug 2001 | 191.09 | 1 |
| Jun 2001 | 196.12 | 1 |
| Apr 2001 | 166.69 | 1 |
| Mar 2001 | 198.45 | 1 |
| Jan 2001 | 164.16 | 1 |
| Nov 2000 | 196.89 | 1 |
| Oct 2000 | 169.14 | 1 |
| Aug 2000 | 163.42 | 1 |
| Jul 2000 | 179.90 | 1 |
| Jun 2000 | 194.27 | 1 |
| Apr 2000 | 183.50 | 1 |
| Mar 2000 | 188.00 | 1 |
| Feb 2000 | 182.01 | 1 |
| Dec 1999 | 183.42 | 1 |
| Nov 1999 | 176.93 | 1 |
| Sep 1999 | 185.93 | 1 |
| Aug 1999 | 184.42 | 1 |
| Jul 1999 | 185.32 | 1 |
| May 1999 | 183.96 | 1 |
| Apr 1999 | 184.23 | 1 |
| Mar 1999 | 185.33 | 1 |
| Feb 1999 | 184.68 | 1 |
| Jan 1999 | 183.34 | 1 |
| Nov 1998 | 172.89 | 1 |
| Oct 1998 | 179.96 | 1 |
| Sep 1998 | 183.58 | 1 |
| Jul 1998 | 180.00 | 1 |
| May 1998 | 211.67 | 1 |
| Apr 1998 | 171.90 | 1 |
| Feb 1998 | 191.15 | 1 |
| Jan 1998 | 195.01 | 1 |
| Nov 1997 | 192.00 | 1 |
| Oct 1997 | 188.29 | 1 |
| Sep 1997 | 172.65 | 1 |
| Jul 1997 | 179.63 | 1 |
| Jun 1997 | 170.42 | 1 |
| May 1997 | 171.84 | 1 |
| Apr 1997 | 215.16 | 1 |
| Jan 1997 | 214.59 | 1 |
| Dec 1996 | 214.70 | 1 |
| Nov 1996 | 215.18 | 1 |
| Sep 1996 | 278.76 | 1 |
| Aug 1996 | 212.32 | 1 |
| Jun 1996 | 224.31 | 1 |
| May 1996 | 200.66 | 1 |
| Apr 1996 | 209.61 | 1 |
| Mar 1996 | 205.91 | 1 |
| Jan 1996 | 207.72 | 1 |
| Dec 1995 | 195.00 | 4 |
| Nov 1995 | 215.00 | 4 |
| Oct 1995 | 205.00 | 4 |
| Aug 1995 | 211.00 | 4 |
| Jul 1995 | 204.00 | 4 |
| Jun 1995 | 213.00 | 4 |
| Apr 1995 | 206.00 | 4 |
| Mar 1995 | 410.00 | 4 |
| Jan 1995 | 213.00 | 4 |
| Dec 1994 | 205.00 | 4 |
| Nov 1994 | 214.00 | 4 |
| Oct 1994 | 201.00 | 4 |
| Sep 1994 | 211.00 | 4 |
| Aug 1994 | 205.00 | 4 |
| Jun 1994 | 213.00 | 4 |
| May 1994 | 201.00 | 4 |
| Apr 1994 | 213.00 | 4 |
| Mar 1994 | 201.00 | 4 |
| Feb 1994 | 211.00 | 4 |
| Jan 1994 | 182.00 | 4 |
| Dec 1993 | 112.00 | 4 |
| Nov 1993 | 136.00 | 4 |
| Oct 1993 | 161.00 | 4 |
| Sep 1993 | 160.00 | 4 |
| Aug 1993 | 135.00 | 4 |
| Jun 1993 | 209.00 | 4 |
| May 1993 | 140.00 | 4 |
| Apr 1993 | 163.00 | 4 |
| Mar 1993 | 265.00 | 4 |
| Feb 1993 | 175.00 | 4 |
| Jan 1993 | 6.00 | 4 |
| Dec 1992 | 148.00 | 4 |
| Nov 1992 | 189.00 | 4 |
| Oct 1992 | 240.00 | 4 |
| Sep 1992 | 258.00 | 4 |
| Aug 1992 | 210.00 | 4 |
| Jul 1992 | 203.00 | 4 |
| Jun 1992 | 262.00 | 4 |
| May 1992 | 210.00 | 4 |
| Apr 1992 | 121.00 | 4 |
| Mar 1992 | 138.00 | 4 |
| Feb 1992 | 143.00 | 4 |
| Jan 1992 | 156.00 | 4 |
| Dec 1991 | 146.00 | 4 |
| Nov 1991 | 124.00 | 4 |
| Oct 1991 | 169.00 | 4 |
| Sep 1991 | 184.00 | 4 |
| Aug 1991 | 154.00 | 4 |
| Jul 1991 | 152.00 | 4 |
| Jun 1991 | 165.00 | 4 |
| May 1991 | 177.00 | 4 |
| Apr 1991 | 165.00 | 4 |
| Mar 1991 | 171.00 | 4 |
| Feb 1991 | 165.00 | 4 |
| Jan 1991 | 179.00 | 4 |
| Dec 1990 | 197.00 | 4 |
| Nov 1990 | 175.00 | 4 |
| Oct 1990 | 172.00 | 4 |
| Sep 1990 | 177.00 | 4 |
| Aug 1990 | 190.00 | 4 |
| Jul 1990 | 192.00 | 4 |
| Jun 1990 | 166.00 | 4 |
| May 1990 | 146.00 | 4 |
| Apr 1990 | 193.00 | 4 |
| Mar 1990 | 204.00 | 4 |
| Feb 1990 | 174.00 | 4 |
| Jan 1990 | 201.00 | 4 |
| Dec 1989 | 153.00 | 4 |
| Nov 1989 | 198.00 | 4 |
| Oct 1989 | 210.00 | 4 |
| Sep 1989 | 239.00 | 4 |
| Aug 1989 | 270.00 | 4 |
| Jul 1989 | 226.00 | 4 |
| Jun 1989 | 215.00 | 4 |
| May 1989 | 222.00 | 4 |
| Apr 1989 | 198.00 | 4 |
| Mar 1989 | 203.00 | 4 |
| Feb 1989 | 177.00 | 4 |
| Jan 1989 | 204.00 | 4 |
| Dec 1988 | 227.00 | 4 |
| Nov 1988 | 200.00 | 4 |
| Oct 1988 | 220.00 | 4 |
| Sep 1988 | 192.00 | 4 |
| Aug 1988 | 225.00 | 4 |
| Jul 1988 | 230.00 | 4 |
| Jun 1988 | 203.00 | 4 |
| May 1988 | 203.00 | 4 |
| Apr 1988 | 269.00 | 4 |
| Mar 1988 | 228.00 | 4 |
| Feb 1988 | 186.00 | 4 |
| Jan 1988 | 281.00 | 4 |
| Dec 1987 | 240.00 | 4 |
| Nov 1987 | 291.00 | 4 |
| Oct 1987 | 310.00 | 4 |
| Sep 1987 | 314.00 | 4 |
| Aug 1987 | 260.00 | 4 |
| Jul 1987 | 279.00 | 4 |
| Jun 1987 | 202.00 | 4 |
| May 1987 | 342.00 | 4 |
| Apr 1987 | 274.00 | 4 |
| Mar 1987 | 213.00 | 4 |
| Feb 1987 | 250.00 | 4 |
| Jan 1987 | 269.00 | 4 |
| Apr 1983 | 206.00 | 3 |
| Mar 1983 | 250.00 | 3 |
| Feb 1983 | 213.00 | 3 |
| Jan 1983 | 237.00 | 3 |
| Dec 1982 | 253.00 | 3 |
| Nov 1982 | 258.00 | 3 |
| Oct 1982 | 287.00 | 3 |
| Sep 1982 | 305.00 | 3 |
| Aug 1982 | 271.00 | 3 |
| Jul 1982 | 251.00 | 3 |
| Jun 1982 | 286.00 | 3 |
| May 1982 | 289.00 | 3 |
| Apr 1982 | 294.00 | 3 |
| Mar 1982 | 289.00 | 3 |
| Feb 1982 | 279.00 | 3 |
| Jan 1982 | 326.00 | 3 |
| Dec 1981 | 374.00 | 3 |
| Nov 1981 | 314.00 | 3 |
| Oct 1981 | 404.00 | 3 |
| Sep 1981 | 414.00 | 3 |
| Aug 1981 | 504.00 | 3 |
| Jul 1981 | 530.00 | 3 |
| Jun 1981 | 553.00 | 3 |
| May 1981 | 579.00 | 3 |
| Apr 1981 | 398.00 | 3 |
| Mar 1981 | 279.00 | 3 |
| Feb 1981 | 266.00 | 3 |
| Jan 1981 | 308.00 | 3 |
| Dec 1980 | 313.00 | 2 |
| Nov 1980 | 329.00 | 2 |
| Oct 1980 | 339.00 | 2 |
| Sep 1980 | 336.00 | 2 |
| Aug 1980 | 373.00 | 2 |
| Jul 1980 | 347.00 | 2 |
| Jun 1980 | 344.00 | 2 |
| May 1980 | 400.00 | 2 |
| Apr 1980 | 353.00 | 2 |
| Mar 1980 | 448.00 | 2 |
| Feb 1980 | 380.00 | 2 |
| Jan 1980 | 498.00 | 2 |
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
6 wells the state's well register assigns to this lease. Every one has a page.
| Well | No. | Operator | Status |
|---|---|---|---|
| O'Brien 'B' | 1 | Ritchie Exploration, Inc. | Plugged and Abandoned |
| O'Brien 'A' | 2 | Ritchie Exploration, Inc. | Plugged and Abandoned |
| O'Brien 'B' | 2 | OXY USA Inc. | Plugged and Abandoned |
| O'Brien 'B' | 4 | OXY USA Inc. | Plugged and Abandoned |
| O'Brien B/P Twin | 1 | Ritchie Exploration, Inc. | Recompleted |
| O'Brien B/P Twin | 1 | Ritchie Exploration, Inc. | Producing |
Location
38.326535, -99.693862 · NWNWSW Sec 7 T20S R21W
Kansas Geological Survey data, corpus built 2026-09-07. Lease 1001119298. The state’s own record.