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DENNIS

Lease 1001115857 · Stafford County, Kansas · SW Sec 26 T21S R12W · DOR 107014

Oil1965–20266 wells
Operator
MAD Operators LLC
Cumulative (state figure)
113,824.45 bbl
First production
1965
Last production
2026
Location (PLSS)
SW Sec 26 T21S R12W

Monthly oil production

419 months filed with the Kansas Geological Survey, Mar 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
93,472.40 bbl
Months filed
419
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 113,824.45 bbl.

MonthOil (bbl)Wells
Apr 2026158.124
Feb 2026154.214
Jan 2026157.894
Nov 2025154.184
Oct 2025156.154
Aug 2025182.264
Jul 2025146.804
May 2025144.883
Apr 2025153.113
Mar 2025140.773
Jan 2025154.893
Dec 2024161.403
Nov 20242.503
Oct 2024160.983
Sep 2024162.383
Jul 2024152.013
Jun 2024162.013
May 2024151.033
Mar 2024162.563
Feb 2024158.603
Jan 2024165.523
Nov 2023169.383
Oct 2023159.873
Sep 2023145.983
Jul 2023149.353
Jun 2023151.233
May 2023157.653
Apr 2023152.313
Mar 2023153.703
Jan 2023202.613
Dec 2022156.943
Oct 2022148.823
Sep 2022155.143
Aug 2022154.343
Jul 2022151.353
Jun 2022160.614
May 2022160.854
Apr 2022155.804
Mar 2022157.484
Jan 2022161.564
Dec 2021146.744
Nov 2021301.034
Oct 2021149.564
Sep 2021155.174
Aug 2021151.064
Jul 2021158.224
Jun 2021151.474
May 2021160.544
Apr 2021306.794
Mar 2021164.264
Jan 2021154.314
Dec 2020145.884
Nov 2020152.054
Oct 2020159.474
Sep 2020158.414
Aug 2020153.924
Jul 2020161.414
Jun 2020156.554
May 2020166.124
Mar 2020166.114
Feb 2020192.764
Jan 2020149.084
Dec 2019157.874
Nov 2019150.564
Oct 2019284.534
Sep 2019153.114
Aug 2019156.954
Jul 2019158.804
Jun 2019153.264
May 2019138.754
Apr 2019320.224
Mar 2019155.094
Feb 2019162.644
Jan 2019175.674
Dec 2018155.574
Nov 2018299.474
Oct 2018171.464
Sep 2018165.924
Aug 2018151.254
Jul 2018156.594
Jun 2018304.944
May 2018160.964
Apr 2018161.344
Mar 2018312.904
Feb 2018155.654
Jan 2018163.084
Dec 2017324.224
Nov 2017158.494
Oct 2017153.894
Sep 2017326.094
Aug 2017156.204
Jul 2017204.414
Jun 2017164.584
May 2017307.124
Apr 2017162.094
Mar 2017318.484
Feb 2017166.984
Jan 2017167.984
Dec 2016322.344
Nov 2016311.364
Oct 2016157.724
Sep 2016164.254
Aug 2016312.174
Jul 2016169.154
Jun 2016313.814
May 2016162.304
Apr 2016166.342
Mar 2016158.612
Feb 2016301.362
Jan 2016166.762
Dec 2015327.972
Nov 2015292.652
Oct 2015307.072
Sep 2015174.522
Aug 2015178.242
Jul 2015344.732
Jun 2015163.682
May 2015363.422
Apr 2015181.382
Mar 2015180.542
Feb 2015186.132
Jan 2015341.962
Dec 2014185.452
Nov 2014340.122
Oct 2014347.292
Sep 2014173.162
Aug 2014183.652
Jul 2014366.142
Jun 2014183.802
May 2014368.082
Apr 2014185.022
Mar 2014377.232
Feb 2014178.992
Jan 2014382.332
Dec 2013180.192
Nov 2013380.962
Oct 2013186.392
Sep 2013376.192
Aug 2013188.152
Jul 2013375.632
Jun 2013188.162
May 2013370.572
Apr 2013191.542
Mar 2013526.282
Feb 2013167.922
Jan 2013192.102
Dec 2012374.072
Nov 2012368.232
Oct 2012377.122
Sep 2012186.152
Aug 2012372.122
Jul 2012340.622
Jun 2012370.492
May 2012371.882
Apr 2012357.932
Mar 2012357.362
Feb 2012354.612
Jan 2012336.542
Dec 2011356.722
Nov 2011351.592
Oct 2011376.292
Sep 2011569.072
Aug 2011366.312
Jul 2011369.692
Jun 2011563.902
May 2011389.762
Apr 2011387.632
Mar 2011354.922
Feb 2011943.832
Dec 2010202.142
Oct 2010185.432
Aug 2010182.622
Jun 2010191.642
Apr 2010183.062
Mar 2010178.852
Dec 2009167.792
Oct 2009178.362
Sep 2009175.832
Jul 2009176.512
Jun 2009167.332
Apr 2009166.982
Mar 2009174.132
Jan 2009167.152
Nov 2008182.942
Sep 2008351.302
Jul 2008198.692
Jun 2008189.882
Apr 2008369.252
Mar 2008199.712
Feb 2008165.912
Nov 2007163.262
Aug 2007162.102
May 2007162.752
Mar 2007166.362
Jan 2007163.082
Oct 2006157.112
Aug 2006160.292
May 2006184.004
Mar 2006179.014
Dec 2005169.684
Oct 2005160.664
Aug 2005149.174
Jun 2005152.804
Apr 2005160.364
Jan 2005168.194
Nov 2004146.314
Sep 2004153.084
Jul 2004158.294
May 2004158.294
Mar 2004160.734
Jan 2004165.244
Dec 2003167.574
Oct 2003161.724
Aug 2003156.074
Jul 2003174.434
May 2003163.734
Apr 2003167.704
Mar 2003184.764
Feb 2003168.794
Dec 2002174.674
Oct 2002158.114
Aug 2002163.514
May 2002147.914
Apr 2002170.944
Mar 2002170.514
Jan 2002161.514
Dec 2001154.374
Nov 2001156.194
Sep 2001136.154
Aug 2001154.354
Jul 2001166.194
May 2001146.104
Apr 2001159.373
Mar 2001170.923
Feb 2001167.163
Dec 2000150.993
Nov 2000291.293
Sep 2000150.903
Aug 2000163.903
Jul 2000162.973
Jun 2000151.143
May 2000296.483
Mar 2000161.893
Feb 2000166.903
Jan 2000162.793
Dec 1999175.513
Oct 1999140.673
Sep 1999167.093
Aug 1999162.403
Jul 1999160.043
Jun 1999166.903
May 1999311.963
Apr 1999164.664
Mar 1999168.554
Jan 1999153.134
Dec 1998168.764
Nov 1998182.524
Oct 1998167.714
Sep 1998161.534
Aug 1998167.674
Jul 1998167.374
Jun 1998167.364
May 1998167.034
Apr 1998166.304
Mar 1998167.274
Feb 1998153.204
Jan 1998161.394
Dec 1997168.244
Nov 1997168.354
Oct 1997335.504
Sep 1997179.714
Aug 1997182.594
Jul 1997172.494
Jun 1997176.114
May 1997184.664
Apr 1997181.104
Mar 1997368.714
Feb 1997170.154
Jan 1997176.724
Dec 1996180.324
Nov 1996166.094
Oct 1996341.794
Sep 1996175.054
Aug 1996181.344
Jul 1996372.164
Jun 1996194.794
May 1996179.274
Apr 1996187.504
Mar 1996382.334
Feb 1996167.284
Jan 1996365.074
Dec 1995176.003
Nov 1995338.003
Oct 1995187.003
Sep 1995353.003
Aug 1995350.003
Jul 1995192.003
Jun 1995338.003
May 1995323.003
Apr 1995340.003
Mar 1995171.003
Feb 1995331.003
Jan 1995352.003
Dec 1994346.003
Nov 1994372.003
Oct 1994349.003
Sep 1994477.003
Aug 1994326.003
Jul 1994384.003
Jun 1994334.003
May 1994486.003
Apr 1994523.003
Mar 1994377.003
Feb 1994556.003
Jan 1994533.003
Dec 1993682.003
Nov 1993581.003
Oct 1993732.003
Sep 1993951.003
Aug 1993920.003
Jul 1993489.003
Jun 1993192.003
Mar 1993118.003
Feb 199398.003
Jan 1993120.003
Oct 1992129.003
Aug 1992141.003
Jun 1992145.003
Apr 199282.003
Mar 1992113.003
Jan 1992161.003
Nov 1991188.003
Sep 1991151.003
Jul 1991208.003
May 1991180.003
Mar 1991193.003
Jan 1991173.003
Nov 1990168.003
Sep 1990191.003
Jul 1990160.003
Feb 1990162.003
Jan 1990180.003
Nov 1989170.003
Oct 1989177.003
Aug 1989137.003
Jul 1989121.003
Jun 1989173.003
Mar 1989165.003
Jan 1989179.003
Nov 1988179.003
Aug 1988177.003
Jun 198898.003
May 1988189.003
Apr 1988199.003
Feb 1988201.003
Dec 1987199.003
Oct 1987200.003
Aug 1987199.003
Jun 1987198.003
May 1987185.003
Mar 1987200.003
Jan 1987180.003
Dec 1986201.003
Oct 1986176.003
Sep 1986197.003
Jul 1986192.003
Jun 1986197.003
Apr 1986198.003
Mar 1986201.003
Jan 1986150.003
Dec 1985201.003
Nov 1985201.003
Oct 1985201.003
Aug 1985200.003
Jul 1985197.003
Jun 1985197.003
Apr 1985201.003
Mar 1985200.003
Jan 1985201.003
Dec 1984199.003
Nov 1984201.003
Oct 1984201.003
Sep 1984198.003
Jul 1984184.003
Jun 1984179.003
May 1984198.003
Apr 1984194.003
Mar 1984191.003
Feb 1984199.003
Jan 1984202.003
Dec 1983181.003
Nov 1983201.003
Oct 1983200.003
Sep 1983198.003
Aug 1983371.003
Jul 1983197.003
Jun 1983340.003
May 1983199.003
Apr 1983200.003
Mar 1983201.003
Feb 1983402.003
Jan 1983200.003
Dec 1982403.003
Nov 1982203.003
Oct 1982331.003
Sep 1982395.003
Aug 1982396.003
Jul 1982394.003
Jun 1982396.003
Apr 1982197.003
Mar 1982197.003
Dec 1981192.001
Sep 1981198.001
Jun 1981197.001
Feb 1981202.001
Nov 1980185.001
Aug 1980171.001
May 1980193.001
Mar 1980197.001

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.

WellNo.OperatorStatus
Siefkes1MAD Operators LLCProducing
Siefkes4L. D. Drilling, Inc.Plugged and Abandoned
Siefkes5MAD Operators LLCProducing
Dennis6L. D. Drilling, Inc.Plugged and Abandoned
Dennis7MAD Operators LLCProducing
Dennis8-26MAD Operators LLCProducing

Location

38.191426, -98.614824 · SW Sec 26 T21S R12W

Kansas Geological Survey data, corpus built 2026-09-07. Lease 1001115857. The state’s own record.