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SIEFKES

Lease 1001136542 · Stafford County, Kansas · SESWNE Sec 27 T21S R12W · DOR 123329

Oil1985–20268 wells
Operator
MAD Operators LLC
Cumulative (state figure)
71,823.28 bbl
First production
1985
Last production
2026
Location (PLSS)
SESWNE Sec 27 T21S R12W

Monthly oil production

297 months filed with the Kansas Geological Survey, Jun 1985 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
71,823.30 bbl
Months filed
297
Most wells in a month
4
MonthOil (bbl)Wells
Apr 2026164.012
Jan 2026151.122
Nov 2025161.752
Aug 2025152.022
May 2025156.174
Apr 2025163.884
Mar 2025163.364
Dec 2024164.604
Nov 2024161.914
Sep 2024157.144
Aug 2024163.754
Jul 2024161.574
May 2024162.464
Apr 2024160.424
Feb 2024155.854
Jan 2024162.084
Nov 2023163.334
Oct 2023159.364
Sep 2023147.564
Jul 2023156.524
Jun 2023156.934
May 2023160.894
Mar 2023152.734
Feb 2023149.174
Jan 2023163.154
Dec 2022161.354
Oct 2022163.814
Sep 2022161.054
Aug 2022161.454
Jun 2022160.314
May 2022160.804
Apr 2022157.984
Mar 2022165.624
Jan 2022164.284
Dec 2021159.124
Nov 2021164.304
Oct 2021162.844
Sep 2021162.174
Aug 2021148.194
Jul 2021156.114
Jun 2021161.234
May 2021160.264
Mar 2021158.264
Feb 2021162.604
Dec 2020161.554
Nov 2020161.564
Aug 2020143.834
Jul 2020160.094
Jun 2020162.524
Apr 2020158.654
Mar 2020162.534
Feb 2020164.654
Jan 2020165.744
Dec 2019136.184
Nov 2019161.174
Oct 2019162.584
Sep 2019159.884
Aug 2019160.294
Jul 2019160.784
Jun 2019161.624
May 2019154.354
Apr 2019163.534
Mar 2019161.934
Feb 2019313.194
Jan 2019163.214
Dec 2018164.934
Nov 2018199.404
Oct 2018162.114
Sep 2018162.684
Aug 2018160.014
Jul 2018159.854
Jun 2018162.364
May 2018190.974
Apr 2018317.194
Mar 2018164.004
Feb 2018159.044
Jan 2018165.874
Dec 2017326.484
Nov 2017158.084
Oct 2017164.844
Sep 2017315.404
Aug 2017160.914
Jul 2017162.024
Jun 2017322.774
May 2017161.644
Apr 2017327.214
Mar 2017163.924
Feb 2017161.554
Jan 2017327.874
Dec 2016158.134
Nov 2016318.634
Oct 2016162.964
Sep 2016307.814
Aug 2016324.624
Jul 2016319.604
Jun 2016163.494
May 2016316.364
Apr 2016319.934
Mar 2016163.754
Feb 2016325.404
Jan 2016330.804
Dec 2015322.984
Nov 2015327.394
Oct 2015321.774
Sep 2015160.704
Aug 2015326.454
Jul 2015308.884
Jun 2015315.904
May 2015325.024
Apr 2015328.454
Mar 2015488.684
Feb 2015164.554
Jan 2015498.394
Dec 2014330.584
Nov 2014331.994
Oct 2014479.574
Sep 2014324.464
Aug 2014327.334
Jul 2014566.454
Jun 2014317.424
May 2014479.994
Apr 2014317.634
Mar 2014485.064
Feb 2014324.354
Jan 2014450.504
Dec 2013330.304
Nov 2013489.194
Oct 2013634.514
Sep 2013323.934
Aug 2013483.524
Jul 2013488.064
Jun 2013489.944
May 2013644.004
Apr 2013330.041
Mar 2013495.431
Feb 2013500.741
Jan 2013671.251
Dec 2012661.691
Nov 2012494.761
Oct 2012665.081
Sep 2012788.551
Aug 2012645.171
Jul 2012810.061
Jun 2012482.671
May 2012646.521
Apr 2012651.341
Mar 2012649.281
Feb 2012828.671
Jan 2012981.371
Dec 2011496.511
Nov 2011183.301
Oct 2011319.221
Sep 2011327.891
Aug 2011490.771
Jul 2011322.191
Jun 2011488.641
May 2011487.721
Apr 2011322.301
Mar 2011472.771
Feb 2011500.691
Jan 2011497.641
Dec 2010672.621
Nov 2010660.951
Oct 2010822.131
Sep 2010640.591
Apr 2010182.851
Oct 2009151.891
May 2009158.921
Oct 2008158.701
May 2008160.741
Nov 2007151.791
Jun 2007163.711
Mar 2007158.581
Oct 2006162.851
Jun 2006156.251
Feb 2006157.281
Nov 2005154.821
May 2005162.041
Jan 2005135.991
Oct 2004159.341
Jul 2004159.681
Mar 2004160.051
Dec 2003159.421
Sep 2003159.241
Jun 2003161.091
Feb 2003160.961
Nov 2002161.091
Aug 2002158.341
May 2002158.501
Feb 2002158.611
Nov 2001159.101
Aug 2001156.441
Jun 2001155.951
Mar 2001160.631
Dec 2000160.711
Oct 2000157.831
Jul 2000159.451
May 2000156.171
Feb 2000161.751
Nov 1999158.121
Aug 1999159.121
Jun 1999157.281
Mar 1999165.761
Jan 1999159.091
Oct 1998162.681
Jun 1998139.791
Apr 1998156.011
Jan 1998159.591
Nov 1997162.561
Aug 1997158.461
Jun 1997157.761
Apr 1997163.341
Jan 1997155.421
Nov 1996163.041
Sep 1996163.631
Jun 1996153.871
Apr 1996158.331
Feb 1996163.311
Dec 1995168.001
Oct 1995155.001
Aug 1995161.001
May 1995163.001
Mar 1995161.001
Jan 1995153.001
Nov 1994139.001
Sep 1994160.001
Jul 1994159.001
May 1994163.001
Mar 1994161.001
Nov 1993166.001
Oct 1993162.001
Jul 1993160.001
May 1993161.001
Mar 1993164.001
Jan 1993164.001
Nov 1992165.001
Sep 1992159.001
Jul 1992163.001
May 1992163.001
Mar 1992165.001
Jan 1992167.001
Nov 1991145.001
Oct 1991164.001
Aug 1991162.001
Jun 1991160.001
Apr 1991167.001
Feb 1991163.001
Jan 1991165.001
Dec 199044.001
Nov 1990166.001
Sep 1990164.001
Aug 1990162.001
Jun 1990141.001
Apr 1990194.001
Mar 1990162.001
Jan 1990164.001
Nov 1989164.001
Oct 1989161.001
Aug 1989163.001
Jul 1989161.001
May 1989161.001
Mar 1989159.001
Feb 1989164.001
Dec 1988163.001
Nov 1988164.001
Sep 1988160.001
Jul 1988159.001
Jun 1988159.001
Apr 1988151.001
Mar 1988161.001
Jan 1988164.001
Dec 1987161.001
Oct 1987163.001
Sep 1987160.001
Aug 1987160.001
Jun 1987160.001
May 1987162.001
Mar 1987164.001
Feb 1987160.001
Dec 1986164.001
Nov 1986160.001
Oct 1986161.001
Aug 1986161.001
Jul 1986159.001
Jun 1986162.001
May 1986162.001
Apr 1986159.001
Mar 1986324.001
Feb 1986163.001
Jan 1986160.001
Dec 1985164.001
Nov 1985329.001
Oct 1985326.001
Sep 1985318.001
Aug 1985320.001
Jul 1985323.001
Jun 1985789.001

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

8 wells the state's well register assigns to this lease. Every one has a page.

WellNo.OperatorStatus
SIEFKES1unavailablePlugged and Abandoned
SIEFKES 'B'1unavailablePlugged and Abandoned
Siefkes1L. D. Drilling, Inc.Expired Intent to Drill (C-1)
Siefkes1MAD Operators LLCProducing
Siefkes2L. D. Drilling, Inc.Plugged and Abandoned
Siefkes4MAD Operators LLCProducing
Siefkes5-27MAD Operators LLCProducing
Siefkes6-27MAD Operators LLCProducing

Location

38.196038, -98.625139 · SESWNE Sec 27 T21S R12W

Kansas Geological Survey data, corpus built 2026-09-07. Lease 1001136542. The state’s own record.