COSSMAN

Lease 1004755826 · Pawnee County, Kansas · Sec 20 T23S R15W · DOR 111088

Oil1976–19955 wells

Operator

Siroky Oil Management

Cumulative (state figure)

131,611 bbl

First production

1976

Last production

1995

Location (PLSS)

Sec 20 T23S R15W

Monthly oil production

141 months filed with the Kansas Geological Survey, Jan 1980 to Jun 1995. 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

67,867 bbl

Months filed

141

Most wells in a month

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 131,611 bbl.

Month	Oil (bbl)	Wells
Jun 1995	59	5
Dec 1994	143	5
Oct 1994	157	5
Jul 1994	26	5
Jun 1994	138	5
Mar 1993	161	5
Jul 1992	159	5
May 1992	159	5
Mar 1992	165	5
Jan 1992	165	5
Nov 1991	157	5
Oct 1991	162	5
Aug 1991	164	5
Jun 1991	161	5
May 1991	165	5
Apr 1991	161	5
Mar 1991	163	5
Feb 1991	161	5
Jan 1991	160	5
Nov 1990	323	5
Oct 1990	163	5
Sep 1990	166	5
Aug 1990	161	5
Jul 1990	164	5
Jun 1990	160	5
May 1990	164	5
Apr 1990	162	5
Mar 1990	173	5
Feb 1990	180	5
Dec 1989	150	5
Oct 1989	165	5
Aug 1989	161	5
Jul 1989	156	5
Jun 1989	158	5
May 1989	162	5
Mar 1989	167	5
Jan 1989	162	5
Dec 1988	164	5
Nov 1988	162	5
Oct 1988	326	5
Sep 1988	326	5
Aug 1988	500	5
Jul 1988	313	5
Jun 1988	321	5
May 1988	153	5
Apr 1988	326	5
Mar 1988	163	5
Feb 1988	330	5
Jan 1988	348	5
Dec 1987	162	5
Nov 1987	330	5
Oct 1987	330	5
Sep 1987	162	5
Aug 1987	482	5
Jul 1987	357	5
Jun 1987	161	5
May 1987	325	5
Jan 1987	329	5
Dec 1986	165	5
Nov 1986	163	5
Oct 1986	164	5
Sep 1986	162	5
Aug 1986	319	5
Jul 1986	165	5
Jun 1986	161	5
May 1986	322	5
Apr 1986	158	5
Mar 1986	323	5
Feb 1986	163	5
Jan 1986	492	5
Dec 1985	161	5
Nov 1985	162	5
Oct 1985	326	5
Sep 1985	325	5
Aug 1985	163	5
Jul 1985	325	5
Jun 1985	323	5
May 1985	483	5
Apr 1985	479	5
Mar 1985	485	5
Feb 1985	329	5
Jan 1985	329	5
Dec 1984	490	5
Nov 1984	653	5
Oct 1984	972	5
Sep 1984	805	5
Aug 1984	1,127	5
Jul 1984	800	5
Jun 1984	816	5
May 1984	975	5
Apr 1984	987	5
Mar 1984	636	5
Feb 1984	655	5
Jan 1984	1,144	5
Dec 1983	1,500	5
Nov 1983	2,449	5
Oct 1983	813	5
Sep 1983	1,133	5
Aug 1983	1,301	5
Jul 1983	1,605	5
Jun 1983	818	5
May 1983	633	5
Apr 1983	880	5
Mar 1983	492	5
Feb 1983	650	5
Jan 1983	616	5
Dec 1982	817	3
Nov 1982	984	3
Oct 1982	1,143	3
Sep 1982	819	3
Aug 1982	970	3
Jul 1982	1,134	3
Jun 1982	1,119	3
May 1982	1,451	3
Apr 1982	2,282	3
Mar 1982	623	3
Feb 1982	320	3
Jan 1982	482	3
Dec 1981	163	2
Nov 1981	162	2
Sep 1981	650	2
Aug 1981	660	2
Jul 1981	811	2
Jun 1981	485	2
May 1981	813	2
Apr 1981	659	2
Mar 1981	657	2
Feb 1981	332	2
Jan 1981	595	2
Dec 1980	492	2
Nov 1980	326	2
Oct 1980	960	2
Sep 1980	329	2
Aug 1980	162	2
Jul 1980	651	2
Jun 1980	899	2
May 1980	805	2
Apr 1980	797	2
Mar 1980	824	2
Feb 1980	1,137	2
Jan 1980	804	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

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

Well	No.	Operator	Status
COSSMAN	1	Alpine Drilling Company, Inc.	Plugged and Abandoned
COSSMAN	2	Siroky Oil Management	Plugged and Abandoned
COSSMAN	5	Central Energy Corporation	Plugged and Abandoned
COSSMAN	6	Central Energy Corporation	Plugged and Abandoned
COSSMAN	7	Alpine Drilling Company, Inc.	Plugged and Abandoned

Location

38.036507, -98.995098 · Sec 20 T23S R15W

Kansas Geological Survey data, corpus built 2026-09-07. Lease 1004755826. The state’s own record.