Apache 27-2 Clarkson

API 4006320262 · Harding County, South Dakota · Buffalo field

ProducingOil

API

4006320262

Operator

Citation Oil and Gas Corp.

County

Harding

Field

Buffalo

Location

SENW Sec 27 Twp 021N Rng 03E

Permit

1020

Production

547 monthly filings with South Dakota, Nov 1980 to Jun 2026. Each product is in its own unit and the four are never added.

Cumulative oil

667,080 bbl

Cumulative gas

21,368 MCF

Cumulative water

81,883 bbl

Period	Oil (bbl)	Gas (MCF)	Water (bbl)	Days
Jun 2026	1,108	70	660	30
May 2026	1,138	72	674	31
Apr 2026	1,099	70	658	30
Mar 2026	1,169	72	665	31
Feb 2026	1,052	66	594	28
Jan 2026	1,196	72	657	31
Dec 2025	1,144	72	629	31
Nov 2025	1,160	70	625	30
Oct 2025	1,118	72	600	31
Sep 2025	1,147	70	610	30
Aug 2025	1,202	72	637	31
Jul 2025	1,208	72	649	31
Jun 2025	1,065	70	540	28
May 2025	1,222	72	635	31
Apr 2025	1,192	70	614	30
Mar 2025	1,071	70	592	30
Feb 2025	1,103	66	571	28
Jan 2025	1,230	72	622	31
Dec 2024	1,236	0	615	31
Nov 2024	1,196	70	601	30
Oct 2024	1,244	72	594	31
Sep 2024	1,209	70	594	30
Aug 2024	1,231	72	586	31
Jul 2024	1,272	72	588	31
Jun 2024	1,124	70	530	30
May 2024	1,272	72	590	31
Apr 2024	1,166	70	583	30
Mar 2024	1,271	72	580	31
Feb 2024	1,167	68	549	29
Jan 2024	1,147	68	538	29
Dec 2023	1,243	72	616	31
Nov 2023	1,204	70	519	30
Oct 2023	1,224	72	522	31
Sep 2023	1,159	70	498	30
Aug 2023	1,224	72	516	31
Jul 2023	1,260	72	504	31
Jun 2023	1,241	70	456	30
May 2023	1,278	72	477	31
Apr 2023	1,511	70	467	30
Mar 2023	1,086	72	485	31
Feb 2023	1,215	66	434	28
Jan 2023	1,399	72	487	31
Dec 2022	1,099	70	428	31
Nov 2022	1,281	70	485	30
Oct 2022	1,374	70	514	31
Sep 2022	1,332	70	511	30
Aug 2022	1,385	70	515	31
Jul 2022	1,380	70	515	31
Jun 2022	1,338	70	514	30
May 2022	1,396	70	523	31
Apr 2022	1,643	70	427	27
Mar 2022	860	70	510	31
Feb 2022	1,035	70	359	24
Jan 2022	1,360	70	474	31
Dec 2021	1,367	70	472	31
Nov 2021	1,344	70	445	30
Oct 2021	1,409	70	449	31
Sep 2021	1,353	70	399	30
Aug 2021	1,387	70	400	31
Jul 2021	1,389	70	432	31
Jun 2021	1,259	70	360	30
May 2021	1,355	70	408	31
Apr 2021	1,336	70	405	30
Mar 2021	1,416	70	371	31
Feb 2021	1,209	70	335	28
Jan 2021	1,309	70	337	31
Dec 2020	1,271	0	305	31
Nov 2020	1,232	70	306	30
Oct 2020	1,336	70	293	31
Sep 2020	1,242	70	281	29
Aug 2020	1,320	80	294	31
Jul 2020	1,329	70	328	31
Jun 2020	1,283	70	288	30
May 2020	1,337	70	299	31
Apr 2020	1,288	70	281	30
Mar 2020	1,395	70	310	31
Feb 2020	1,204	70	245	29
Jan 2020	1,309	70	271	31
Dec 2019	1,283	70	257	31
Nov 2019	1,252	70	250	30
Oct 2019	1,259	70	247	31
Sep 2019	1,242	70	237	30
Aug 2019	1,252	70	275	31
Jul 2019	1,266	70	252	31
Jun 2019	1,206	70	248	30
May 2019	1,227	70	242	31
Apr 2019	1,135	70	242	30
Mar 2019	1,298	70	255	31
Feb 2019	1,105	70	211	28
Jan 2019	1,209	70	232	31
Dec 2018	1,193	70	241	31
Nov 2018	1,106	70	212	30
Oct 2018	1,150	70	224	31
Sep 2018	1,058	70	210	30
Aug 2018	1,160	70	233	31
Jul 2018	1,112	70	214	31
Jun 2018	1,044	70	203	30
May 2018	1,020	70	218	31
Apr 2018	1,001	70	0	30
Mar 2018	965	70	205	31
Feb 2018	816	—	164	28
Jan 2018	881	70	—	31
Nov 2017	824	70	174	30
Oct 2017	839	70	180	31
Sep 2017	813	70	165	30
Aug 2017	821	70	163	31
Jul 2017	794	70	165	31
Jun 2017	781	70	157	30
May 2017	836	70	159	31
Apr 2017	866	70	162	30
Mar 2017	863	72	158	31
Feb 2017	586	70	105	28
Jan 2017	750	70	133	31
Dec 2016	720	70	130	31
Nov 2016	790	70	145	30
Oct 2016	828	70	147	31
Sep 2016	797	70	146	30
Aug 2016	829	70	149	31
Jul 2016	814	72	144	31
Jun 2016	778	70	134	30
May 2016	820	72	139	31
Apr 2016	782	70	133	30
Mar 2016	820	0	133	31
Feb 2016	767	70	128	29
Jan 2016	828	72	128	31
Dec 2015	844	72	138	31
Nov 2015	834	60	121	30
Oct 2015	865	62	137	31
Sep 2015	825	60	127	30
Aug 2015	864	60	136	31
Jul 2015	841	62	125	31
Jun 2015	808	60	122	30
May 2015	842	62	122	31
Apr 2015	829	60	114	30
Mar 2015	855	62	122	31
Feb 2015	790	56	113	28
Jan 2015	876	62	124	31
Dec 2014	862	62	136	31
Nov 2014	859	60	125	30
Oct 2014	895	62	119	31
Sep 2014	869	60	128	30
Aug 2014	922	62	137	31
Jul 2014	907	62	137	31
Jun 2014	895	60	117	30
May 2014	921	62	141	31
Apr 2014	890	60	137	30
Mar 2014	920	62	121	31
Feb 2014	812	56	112	28
Jan 2014	931	62	122	31
Dec 2013	907	62	119	31
Nov 2013	906	60	113	30
Oct 2013	947	62	117	31
Sep 2013	935	60	111	30
Aug 2013	960	62	109	31
Jul 2013	974	62	107	31
Jun 2013	946	60	118	30
May 2013	1,019	62	114	31
Apr 2013	991	60	106	30
Mar 2013	1,011	62	115	31
Feb 2013	895	56	97	28
Jan 2013	1,015	60	104	31
Dec 2012	1,023	62	103	31
Nov 2012	1,064	60	107	30
Oct 2012	999	56	94	28
Sep 2012	1,010	60	97	30
Aug 2012	1,077	62	98	31
Jul 2012	1,082	62	97	31
Jun 2012	1,074	60	88	30
May 2012	1,145	62	90	31
Apr 2012	1,100	60	80	30
Mar 2012	1,125	62	78	31
Feb 2012	1,071	58	75	29
Jan 2012	1,150	62	78	31
Dec 2011	1,197	62	83	31
Nov 2011	1,191	60	86	30
Oct 2011	1,271	62	92	31
Sep 2011	1,224	60	85	27
Aug 2011	1,199	62	90	31
Jul 2011	1,125	62	78	31
Jun 2011	1,051	60	71	30
May 2011	1,084	62	71	31
Apr 2011	1,064	60	71	30
Mar 2011	1,148	62	87	31
Feb 2011	1,037	56	68	28
Jan 2011	1,190	62	80	31
Dec 2010	1,202	62	85	31
Nov 2010	1,233	60	96	30
Oct 2010	1,329	62	90	31
Sep 2010	1,300	60	88	30
Aug 2010	1,303	62	94	31
Jul 2010	1,303	62	91	31
Jun 2010	1,242	60	85	30
May 2010	1,295	62	89	31
Apr 2010	1,281	60	98	30
Mar 2010	1,334	62	93	31
Feb 2010	1,267	56	85	28
Jan 2010	1,262	52	78	26
Dec 2009	1,137	54	70	27
Nov 2009	1,250	60	83	30
Oct 2009	1,297	62	88	31
Sep 2009	1,281	60	84	30
Aug 2009	1,277	58	80	29
Jul 2009	1,302	62	95	31
Jun 2009	1,233	58	83	29
May 2009	1,282	62	96	31
Apr 2009	1,280	60	82	30
Mar 2009	1,353	60	87	30
Feb 2009	1,100	54	74	27
Jan 2009	1,307	62	88	31
Dec 2008	1,318	62	96	31
Nov 2008	1,250	54	78	27
Oct 2008	1,314	62	86	31
Sep 2008	1,288	60	84	30
Aug 2008	436	62	2,638	31
Jul 2008	1,381	62	95	31
Jun 2008	1,451	60	117	30
May 2008	1,086	0	88	18
Apr 2008	1,159	60	68	30
Mar 2008	1,206	62	63	31
Feb 2008	1,180	58	68	29
Jan 2008	1,280	62	79	31
Dec 2007	1,288	62	71	31
Nov 2007	1,232	60	76	30
Oct 2007	1,297	62	77	31
Sep 2007	1,270	60	77	30
Aug 2007	1,297	60	77	30
Jul 2007	1,335	62	83	31
Jun 2007	1,302	60	80	30
May 2007	1,346	32	80	31
Apr 2007	1,314	60	76	30
Mar 2007	1,401	62	90	31
Feb 2007	1,279	56	74	24
Jan 2007	1,502	62	96	31
Dec 2006	1,825	62	184	31
Nov 2006	1,596	60	167	30
Oct 2006	894	62	48	31
Sep 2006	1,007	60	47	30
Aug 2006	1,134	62	36	31
Jul 2006	1,148	62	75	31
Jun 2006	1,230	58	22	29
May 2006	1,301	62	42	31
Apr 2006	1,051	52	33	26
Mar 2006	1,262	62	49	31
Feb 2006	1,131	56	28	28
Jan 2006	1,243	60	46	31
Dec 2005	1,218	62	45	31
Nov 2005	1,260	60	50	30
Oct 2005	1,333	62	55	31
Sep 2005	1,281	60	59	30
Aug 2005	1,323	62	62	31
Jul 2005	1,334	62	58	31
Jun 2005	1,311	60	52	30
May 2005	1,340	62	51	31
Apr 2005	1,293	60	51	30
Mar 2005	1,336	62	34	31
Feb 2005	1,182	56	31	28
Jan 2005	1,218	62	53	31
Dec 2004	1,190	62	27	31
Nov 2004	1,238	60	48	30
Oct 2004	1,381	62	67	31
Sep 2004	1,410	60	73	30
Aug 2004	1,368	62	58	31
Jul 2004	1,441	62	78	31
Jun 2004	1,426	60	95	30
May 2004	1,483	62	81	31
Apr 2004	1,479	60	87	30
Mar 2004	1,654	62	94	31
Feb 2004	1,906	58	189	29
Jan 2004	1,305	52	343	26
Dec 2003	1,227	62	57	31
Nov 2003	1,189	60	53	30
Oct 2003	1,244	62	52	31
Sep 2003	1,198	60	59	30
Aug 2003	1,240	62	52	31
Jul 2003	1,231	62	62	31
Jun 2003	1,185	60	52	30
May 2003	1,235	62	56	31
Apr 2003	1,239	60	56	30
Mar 2003	1,086	52	49	26
Feb 2003	1,093	56	52	28
Jan 2003	1,192	62	55	31
Dec 2002	1,205	62	53	31
Nov 2002	1,157	60	62	30
Oct 2002	1,213	62	50	31
Sep 2002	1,167	60	58	30
Aug 2002	1,222	62	56	31
Jul 2002	1,209	58	60	29
Jun 2002	1,172	60	54	30
May 2002	1,205	62	64	31
Apr 2002	1,193	60	59	30
Mar 2002	1,196	62	54	31
Feb 2002	1,044	56	44	28
Jan 2002	1,173	62	53	31
Dec 2001	1,171	62	59	31
Nov 2001	1,160	60	45	30
Oct 2001	1,190	62	55	31
Sep 2001	1,140	60	54	30
Aug 2001	1,183	62	58	31
Jul 2001	1,178	62	56	31
Jun 2001	1,146	60	45	30
May 2001	1,172	62	54	31
Apr 2001	1,149	60	57	30
Mar 2001	1,200	62	54	31
Feb 2001	1,060	56	49	28
Jan 2001	1,201	62	65	31
Dec 2000	1,187	62	58	31
Nov 2000	1,057	60	31	30
Oct 2000	1,175	62	47	31
Sep 2000	1,124	60	45	30
Aug 2000	1,165	62	53	31
Jul 2000	1,155	62	60	31
Jun 2000	1,127	60	38	30
May 2000	1,160	62	66	31
Apr 2000	1,129	60	40	30
Mar 2000	1,165	62	74	31
Feb 2000	1,109	58	52	29
Jan 2000	1,164	62	52	31
Dec 1999	1,165	62	51	31
Nov 1999	1,131	60	56	30
Oct 1999	1,178	62	58	31
Sep 1999	1,158	60	52	30
Aug 1999	1,298	62	53	31
Jul 1999	1,035	50	62	25
Jun 1999	1,135	60	56	30
May 1999	1,190	62	63	31
Apr 1999	1,243	60	84	30
Mar 1999	1,124	62	47	31
Feb 1999	1,023	56	51	28
Jan 1999	1,140	62	48	31
Dec 1998	1,150	62	58	31
Nov 1998	1,127	60	52	30
Oct 1998	1,161	62	49	31
Sep 1998	1,133	60	50	30
Aug 1998	1,168	62	47	31
Jul 1998	1,183	62	39	31
Jun 1998	1,136	60	56	30
May 1998	1,163	62	61	31
Apr 1998	1,116	60	49	30
Mar 1998	1,164	62	47	31
Feb 1998	1,058	0	58	28
Jan 1998	1,143	0	61	31
Dec 1997	1,161	0	45	31
Nov 1997	1,133	0	50	30
Oct 1997	1,153	0	64	31
Sep 1997	1,112	0	55	30
Aug 1997	1,077	0	55	31
Jul 1997	1,221	0	64	31
Jun 1997	1,087	0	52	30
May 1997	1,142	0	71	31
Apr 1997	1,112	0	55	30
Mar 1997	1,109	0	40	26
Feb 1997	1,021	0	41	28
Jan 1997	1,070	0	40	30
Dec 1996	1,143	0	48	31
Nov 1996	1,045	0	42	30
Oct 1996	1,139	0	51	31
Sep 1996	1,071	0	73	30
Aug 1996	1,142	0	49	31
Jul 1996	1,085	0	51	31
Jun 1996	1,051	0	61	30
May 1996	1,118	0	49	31
Apr 1996	1,111	0	55	30
Mar 1996	1,133	0	52	31
Feb 1996	1,063	0	45	29
Jan 1996	1,097	0	50	31
Dec 1995	1,099	0	52	31
Nov 1995	1,086	0	51	30
Oct 1995	1,134	0	59	31
Sep 1995	1,097	0	57	30
Aug 1995	1,144	0	129	31
Jul 1995	1,146	0	62	31
Jun 1995	1,130	0	58	30
May 1995	1,180	0	55	31
Apr 1995	1,154	0	62	30
Mar 1995	1,227	0	68	31
Feb 1995	1,131	0	67	28
Jan 1995	1,267	0	66	31
Dec 1994	1,287	0	63	31
Nov 1994	1,282	0	69	30
Oct 1994	1,355	0	76	31
Sep 1994	1,340	0	83	30
Aug 1994	1,432	0	83	31
Jul 1994	1,477	0	86	31
Jun 1994	1,495	0	83	30
May 1994	1,607	0	88	31
Apr 1994	1,642	0	91	30
Mar 1994	1,838	0	116	31
Feb 1994	1,613	0	95	25
Jan 1994	1,848	0	104	31
Dec 1993	1,934	0	110	31
Nov 1993	1,874	0	96	29
Oct 1993	1,986	0	116	31
Sep 1993	2,042	0	139	30
Aug 1993	2,361	0	176	31
Jul 1993	2,419	0	186	31
Jun 1993	2,417	0	321	30
May 1993	249	0	128	7
Apr 1993	1,087	0	64	30
Mar 1993	1,154	0	65	31
Feb 1993	1,023	0	49	28
Jan 1993	1,134	0	65	31
Dec 1992	1,132	0	60	31
Nov 1992	1,094	0	60	30
Oct 1992	1,131	0	56	31
Sep 1992	1,083	0	49	30
Aug 1992	1,108	0	55	30
Jul 1992	1,114	0	65	31
Jun 1992	1,070	0	51	30
May 1992	1,103	0	62	31
Apr 1992	1,073	0	57	30
Mar 1992	1,099	0	45	31
Feb 1992	1,031	0	47	29
Jan 1992	1,092	0	42	31
Dec 1991	1,095	0	45	31
Nov 1991	1,065	0	51	30
Oct 1991	1,074	0	56	31
Sep 1991	1,041	0	56	30
Aug 1991	1,066	0	56	31
Jul 1991	1,062	0	61	31
Jun 1991	1,042	0	48	30
May 1991	1,063	0	58	31
Apr 1991	1,027	0	49	30
Mar 1991	1,048	0	62	31
Feb 1991	961	0	56	28
Jan 1991	1,056	0	62	31
Dec 1990	1,032	0	63	31
Nov 1990	997	0	52	29
Oct 1990	1,029	0	47	31
Sep 1990	991	0	54	30
Aug 1990	1,015	0	52	31
Jul 1990	1,010	0	51	31
Jun 1990	973	0	53	30
May 1990	997	0	50	31
Apr 1990	960	0	56	30
Mar 1990	1,012	0	51	31
Feb 1990	862	0	39	28
Jan 1990	979	0	42	31
Dec 1989	975	0	41	31
Nov 1989	930	0	51	30
Oct 1989	961	0	46	31
Sep 1989	910	0	53	30
Aug 1989	949	0	46	31
Jul 1989	930	0	49	31
Jun 1989	903	0	42	30
May 1989	931	0	46	31
Apr 1989	884	0	40	30
Mar 1989	935	0	31	31
Feb 1989	781	0	30	26
Jan 1989	901	0	40	31
Dec 1988	884	0	44	31
Nov 1988	874	0	44	29
Oct 1988	853	0	41	31
Sep 1988	839	0	38	30
Aug 1988	857	0	31	31
Jul 1988	855	0	32	31
Jun 1988	824	0	32	30
May 1988	864	0	60	31
Apr 1988	854	0	46	30
Mar 1988	881	0	31	31
Feb 1988	840	0	35	29
Jan 1988	907	0	29	31
Dec 1987	925	0	27	31
Nov 1987	919	0	21	30
Oct 1987	1,056	0	39	29
Sep 1987	558	0	26	19
Aug 1987	959	0	55	31
Jul 1987	964	0	51	30
Jun 1987	949	0	36	30
May 1987	991	0	50	31
Apr 1987	970	0	31	30
Mar 1987	1,018	0	31	31
Feb 1987	933	0	26	28
Jan 1987	1,048	0	31	31
Dec 1986	1,066	0	32	31
Nov 1986	1,057	0	30	30
Oct 1986	1,031	0	24	26
Sep 1986	1,077	0	31	30
Aug 1986	1,145	0	31	30
Jul 1986	1,144	0	33	29
Jun 1986	1,152	0	28	30
May 1986	1,195	0	33	31
Apr 1986	1,176	0	37	30
Mar 1986	1,238	0	35	31
Feb 1986	1,134	0	26	28
Jan 1986	1,282	0	30	31
Dec 1985	1,241	0	25	28
Nov 1985	1,255	0	28	30
Oct 1985	1,332	0	31	31
Sep 1985	1,307	0	29	30
Aug 1985	1,418	0	31	31
Jul 1985	1,400	0	30	30
Jun 1985	1,407	0	27	30
May 1985	1,372	0	19	26
Apr 1985	1,422	0	22	30
Mar 1985	1,461	0	32	31
Feb 1985	1,360	0	30	28
Jan 1985	1,474	0	33	29
Dec 1984	1,509	0	30	31
Nov 1984	1,433	0	29	29
Oct 1984	1,500	0	30	30
Sep 1984	1,481	0	33	30
Aug 1984	1,553	0	31	31
Jul 1984	1,636	0	17	30
Jun 1984	1,347	0	14	27
May 1984	1,566	0	157	31
Apr 1984	1,522	0	152	30
Mar 1984	1,573	0	155	31
Feb 1984	1,479	0	145	29
Jan 1984	1,597	0	155	31
Dec 1983	1,629	0	115	31
Nov 1983	1,622	0	155	30
Oct 1983	1,630	0	192	31
Sep 1983	1,681	0	150	30
Aug 1983	1,659	0	153	31
Jul 1983	1,662	0	155	31
Jun 1983	1,635	0	150	30
May 1983	1,723	0	155	31
Apr 1983	1,658	0	145	29
Mar 1983	1,401	0	155	31
Feb 1983	1,946	0	140	28
Jan 1983	1,787	0	155	31
Dec 1982	1,791	0	115	31
Nov 1982	1,773	0	150	30
Oct 1982	1,823	0	150	31
Sep 1982	1,804	0	130	30
Aug 1982	1,875	0	0	31
Jul 1982	1,896	0	155	31
Jun 1982	1,887	0	120	30
May 1982	1,924	0	150	30
Apr 1982	1,892	0	195	28
Mar 1982	2,031	0	175	31
Feb 1982	1,528	0	101	28
Jan 1982	2,473	0	155	31
Dec 1981	2,199	0	140	28
Nov 1981	1,797	0	127	26
Oct 1981	2,214	0	155	31
Sep 1981	1,834	0	230	30
Aug 1981	2,700	0	360	31
Jul 1981	2,386	0	225	30
Jun 1981	2,459	0	140	30
May 1981	2,709	0	240	31
Apr 1981	2,629	0	185	21
Mar 1981	749	0	19	10
Feb 1981	2,435	0	336	28
Jan 1981	3,048	0	247	30
Dec 1980	3,583	0	192	30
Nov 1980	2,968	0	76	16

A dash is a period the well filed with no volume for that product.

Formation tops

South Dakota records 19 formations for this well, shallowest first.

Formation	Top (ft)	Age
Greenhorn Limestone	3,333	Cretaceous
Fall River Sandstone	4,380	Cretaceous
Morrison Formation	4,522	Jurassic
Piper Formation	5,239	Triassic
Spearfish Formation	5,440	Triassic/Permian
Pine Salt, Spearfish Formation	5,552	Permian
Minnekahta Limestone	5,835	Permian
Opeche Shale	5,878	Permian
Minnelusa Formation	6,062	Permian/Pennsylvanian
Charles Formation	6,480	Mississippian
Mission Canyon Limestone	6,930	Mississippian
Lodgepole Limestone	7,271	Mississippian
Duperow Formation	7,712	Devonian
Interlake Dolomite	7,850	Silurian
Stony Mountain Formation	8,096	Ordovician
Red River Formation	8,245	Ordovician
Unit A, Red River Formation	8,254	Ordovician
Unit B, Red River Formation	8,280	Ordovician
Unit C, Red River Formation	8,359	Ordovician

A dash is a formation South Dakota records for this well without a depth.

Completion

South Dakota files 1 completion report for this well.

Vertical Well

ProducingOil

Spudded

1980-09-13

Completed

1980-11-11

Measured depth

8,495 ft

True vertical depth

8,495 ft

Interval

Formation	Perforated (ft)
Unit B, Red River Formation	8,258–8,304

Location

45.758447, -103.740818

45.75845, -103.74082 · Surface location as filed with South Dakota⌘ or Ctrl + scroll to zoom

Every well in Harding County, South Dakota

South Dakota state record, from SD_wells_SDOILexport_Export__wells_Table_4_Web.parquet. Corpus built 2026-09-11.