Luff M-20H Stearns

API 4006320536 · Harding County, South Dakota · Buffalo field

InjectingWater Injection

API

4006320536

Operator

Luff Exploration Co.

County

Harding

Field

Buffalo

Location

SWSW Sec 20 Twp 022N Rng 04E

Permit

1603

Production

3 monthly filings with South Dakota, Apr 1997 to Jun 1997. Each product is in its own unit and the four are never added.

Cumulative oil

1,735 bbl

Cumulative gas

88 MCF

Cumulative water

2,254 bbl

Period	Oil (bbl)	Gas (MCF)	Water (bbl)	Days
Jun 1997	0	0	0	—
May 1997	1,628	47	1,795	28
Apr 1997	107	41	459	15

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

Injection

350 monthly filings with South Dakota, May 1997 to Jun 2026. 343 of them carry a figure; the rest are months South Dakota filed empty.

Well type

Water Injection

Cumulative fluid injected

5,581,404 bbl

Month	Fluid injected (bbl)	Max pressure (psi)	Avg pressure (psi)	Days
Jun 2026	18,623	1,331	1,326	30
May 2026	19,367	1,335	1,331	31
Apr 2026	18,975	1,339	1,331	30
Mar 2026	19,581	1,330	1,323	31
Feb 2026	17,794	1,320	1,314	28
Jan 2026	19,000	1,307	1,256	31
Dec 2025	19,191	1,419	1,360	31
Nov 2025	19,886	1,400	1,392	30
Oct 2025	20,527	1,381	1,330	31
Sep 2025	19,918	1,302	1,253	30
Aug 2025	18,732	1,170	1,135	31
Jul 2025	18,433	1,191	1,100	31
Jun 2025	18,132	1,121	1,116	30
May 2025	18,271	1,125	1,117	31
Apr 2025	17,157	1,115	1,108	30
Mar 2025	17,493	1,098	1,081	31
Feb 2025	15,362	1,168	1,112	28
Jan 2025	18,202	1,200	1,179	31
Dec 2024	18,709	1,160	1,107	31
Nov 2024	17,269	1,071	864	30
Oct 2024	8,865	646	368	18
Sep 2024	9,669	1,370	1,014	17
Aug 2024	18,240	1,390	1,379	31
Jul 2024	18,647	1,570	1,497	31
Jun 2024	18,395	1,573	1,546	30
May 2024	19,245	1,585	1,575	31
Apr 2024	18,927	1,583	1,566	30
Mar 2024	19,608	1,580	1,568	31
Feb 2024	17,562	1,589	1,555	29
Jan 2024	18,844	1,600	1,572	31
Dec 2023	18,715	1,588	1,544	31
Nov 2023	17,742	1,619	1,472	30
Oct 2023	18,681	1,615	1,569	31
Sep 2023	17,676	1,625	1,595	30
Aug 2023	18,093	1,700	1,667	31
Jul 2023	18,431	1,700	1,692	31
Jun 2023	18,565	1,700	1,700	30
May 2023	19,023	1,700	1,691	31
Apr 2023	18,489	1,700	1,698	30
Mar 2023	18,535	1,700	1,700	31
Feb 2023	16,580	1,700	1,698	28
Jan 2023	19,060	1,700	1,684	31
Dec 2022	18,912	1,700	1,676	29
Nov 2022	20,258	1,700	1,700	30
Oct 2022	20,426	1,700	1,700	31
Sep 2022	20,195	1,700	1,700	30
Aug 2022	21,325	1,700	1,700	31
Jul 2022	20,379	1,700	1,699	31
Jun 2022	19,289	1,700	1,700	30
May 2022	19,478	1,700	1,700	31
Apr 2022	17,513	1,700	1,678	30
Mar 2022	18,581	1,700	1,700	31
Feb 2022	16,730	1,700	1,700	28
Jan 2022	18,569	1,700	1,700	31
Dec 2021	18,950	1,700	1,700	31
Nov 2021	17,614	1,700	1,700	30
Oct 2021	18,967	1,700	1,700	31
Sep 2021	18,112	1,700	1,700	30
Aug 2021	18,588	1,700	1,700	31
Jul 2021	18,450	1,700	1,696	31
Jun 2021	18,047	1,700	1,700	30
May 2021	18,721	1,700	1,700	31
Apr 2021	18,462	1,700	1,700	30
Mar 2021	19,870	1,700	1,700	31
Feb 2021	17,072	1,700	1,700	28
Jan 2021	18,552	1,700	1,700	31
Dec 2020	19,884	1,700	1,700	31
Nov 2020	18,787	1,700	1,700	30
Oct 2020	19,026	1,700	1,687	31
Sep 2020	16,986	1,700	1,622	30
Aug 2020	19,174	1,700	1,700	31
Jul 2020	19,251	1,700	1,700	31
Jun 2020	18,301	1,700	16,228	30
May 2020	17,797	1,600	1,585	31
Apr 2020	17,358	1,650	1,627	30
Mar 2020	17,652	1,680	1,609	31
Feb 2020	16,498	1,600	1,593	29
Jan 2020	17,625	1,600	1,591	31
Dec 2019	17,900	1,625	1,603	31
Nov 2019	17,166	1,650	1,616	30
Oct 2019	18,214	1,625	1,614	31
Sep 2019	18,382	1,650	1,602	30
Aug 2019	18,826	1,650	1,627	31
Jul 2019	19,616	1,650	1,608	31
Jun 2019	17,861	1,650	1,546	30
May 2019	19,463	1,650	1,590	31
Apr 2019	19,423	1,600	1,531	30
Mar 2019	17,979	1,550	1,482	31
Feb 2019	16,950	1,500	1,486	28
Jan 2019	19,468	1,475	1,434	31
Dec 2018	17,466	1,400	1,240	31
Nov 2018	17,411	1,375	1,274	30
Oct 2018	17,911	1,250	1,203	31
Sep 2018	18,656	1,150	1,101	30
Aug 2018	17,643	1,050	923	31
Jul 2018	16,459	800	694	31
Jun 2018	14,445	800	642	30
May 2018	17,697	700	629	31
Apr 2018	17,392	625	595	30
Mar 2018	16,680	575	474	30
Feb 2018	14,200	475	459	28
Jan 2018	15,474	450	431	31
Dec 2017	14,726	400	392	31
Nov 2017	14,064	550	483	30
Oct 2017	16,492	650	580	31
Sep 2017	16,114	600	559	30
Aug 2017	14,188	600	510	22
Jul 2017	14,620	1,250	792	23
Jun 2017	16,521	900	780	30
May 2017	18,014	925	851	31
Apr 2017	18,180	850	794	30
Mar 2017	18,611	700	512	31
Feb 2017	8,685	275	137	15
Jan 2017	—	300	175	—
Dec 2016	8,971	1,700	1,158	14
Nov 2016	19,999	1,700	1,696	30
Oct 2016	20,805	1,700	1,700	31
Sep 2016	20,425	1,700	1,700	30
Aug 2016	20,548	1,700	1,687	31
Jul 2016	20,742	1,700	1,700	31
Jun 2016	20,958	1,700	1,700	30
May 2016	21,918	1,700	1,700	31
Apr 2016	22,138	1,700	1,700	30
Mar 2016	23,442	1,700	1,700	31
Feb 2016	21,518	1,700	1,700	29
Jan 2016	22,808	1,700	1,700	31
Dec 2015	22,106	1,700	1,698	31
Nov 2015	21,232	1,700	1,700	30
Oct 2015	21,838	1,700	1,700	31
Sep 2015	21,005	1,700	1,678	30
Aug 2015	21,686	1,680	1,680	31
Jul 2015	22,065	1,680	1,680	31
Jun 2015	21,848	1,680	1,616	30
May 2015	21,655	1,600	1,533	31
Apr 2015	21,702	1,680	1,606	30
Mar 2015	22,492	1,660	1,558	31
Feb 2015	21,543	1,380	1,284	28
Jan 2015	19,596	1,260	942	31
Dec 2014	17,876	1,460	1,106	31
Nov 2014	24,297	1,400	1,150	30
Oct 2014	1	—	—	31
Sep 2014	15,782	680	646	30
Aug 2014	17,676	620	555	31
Jul 2014	17,984	500	372	31
Jun 2014	14,849	300	227	30
May 2014	14,911	360	255	31
Apr 2014	16,004	380	343	30
Mar 2014	16,700	380	356	31
Feb 2014	15,218	380	305	28
Jan 2014	15,959	300	275	31
Dec 2013	16,595	360	240	31
Nov 2013	16,272	220	147	30
Oct 2013	16,117	140	95	28
Sep 2013	14,883	—	—	30
Aug 2013	15,177	0	0	31
Jul 2013	8,548	0	0	31
Jun 2013	8,201	0	0	30
May 2013	9,623	0	0	31
Apr 2013	10,403	0	0	30
Mar 2013	9,982	0	0	31
Feb 2013	9,993	0	0	28
Jan 2013	11,240	0	0	31
Dec 2012	9,507	0	0	31
Nov 2012	9,927	0	0	30
Oct 2012	10,950	—	—	31
Sep 2012	10,541	0	0	30
Aug 2012	10,948	0	0	31
Jul 2012	10,922	0	0	30
Jun 2012	10,672	0	0	30
May 2012	10,283	0	0	31
Apr 2012	9,670	0	0	30
Mar 2012	10,161	0	0	31
Feb 2012	9,270	0	0	29
Jan 2012	9,090	0	0	31
Dec 2011	10,782	0	0	31
Nov 2011	10,800	0	0	30
Oct 2011	10,440	140	132	31
Sep 2011	12,441	200	145	30
Aug 2011	12,493	160	141	31
Jul 2011	12,217	150	140	31
Jun 2011	11,944	200	142	30
May 2011	12,298	140	140	31
Apr 2011	11,608	140	140	30
Mar 2011	11,764	140	140	31
Feb 2011	10,385	140	115	28
Jan 2011	11,275	80	74	31
Dec 2010	11,080	160	85	31
Nov 2010	11,272	200	91	30
Oct 2010	11,577	100	91	31
Sep 2010	11,168	100	91	30
Aug 2010	10,987	140	98	30
Jul 2010	10,478	1,342	139	31
Jun 2010	9,656	640	296	30
May 2010	10,520	890	412	31
Apr 2010	9,602	600	485	30
Mar 2010	11,815	980	765	31
Feb 2010	13,244	940	887	28
Jan 2010	13,663	1,300	1,028	28
Dec 2009	14,459	1,360	1,041	30
Nov 2009	14,281	1,180	1,074	30
Oct 2009	17,324	1,620	1,355	31
Sep 2009	22,203	1,680	1,475	30
Aug 2009	18,548	1,200	634	28
Jul 2009	—	230	—	—
Jun 2009	8,056	1,700	1,671	14
May 2009	18,945	1,700	1,695	31
Apr 2009	18,237	1,700	1,685	30
Mar 2009	18,860	1,700	1,681	30
Feb 2009	16,129	1,700	1,677	28
Jan 2009	18,801	1,700	1,672	31
Dec 2008	18,716	1,700	1,677	31
Nov 2008	17,902	1,700	1,700	30
Oct 2008	18,078	1,700	1,670	31
Sep 2008	17,956	1,700	1,638	30
Aug 2008	17,664	1,700	1,679	31
Jul 2008	18,410	1,780	1,634	31
Jun 2008	19,477	1,700	1,657	30
May 2008	9,355	1,700	1,424	11
Apr 2008	17,824	1,700	1,691	30
Mar 2008	18,875	1,700	1,681	31
Feb 2008	17,110	1,700	1,661	29
Jan 2008	17,661	1,700	1,666	31
Dec 2007	18,783	1,700	1,700	31
Nov 2007	19,710	1,700	1,681	30
Oct 2007	13,235	1,620	1,490	23
Sep 2007	15,853	1,700	1,606	30
Aug 2007	16,481	1,700	1,595	30
Jul 2007	16,242	1,680	1,583	31
Jun 2007	16,585	1,700	1,653	30
May 2007	17,365	1,640	1,554	31
Apr 2007	15,602	1,675	1,640	30
Mar 2007	17,333	1,700	1,644	31
Feb 2007	16,074	1,700	1,634	28
Jan 2007	18,743	1,700	1,623	31
Dec 2006	16,359	1,690	1,484	31
Nov 2006	17,628	1,700	1,609	30
Oct 2006	17,890	1,680	1,559	31
Sep 2006	17,730	1,700	1,632	30
Aug 2006	17,058	1,660	1,548	31
Jul 2006	17,644	1,700	1,583	31
Jun 2006	18,244	1,700	1,620	30
May 2006	18,530	1,620	1,402	31
Apr 2006	14,572	1,700	1,473	25
Mar 2006	20,783	1,640	1,529	31
Feb 2006	19,079	1,660	1,534	28
Jan 2006	20,645	1,700	1,613	31
Dec 2005	22,370	1,700	1,583	31
Nov 2005	16,293	1,490	1,445	29
Oct 2005	16,962	1,920	1,428	31
Sep 2005	15,259	1,490	1,462	30
Aug 2005	14,670	1,480	1,368	31
Jul 2005	17,853	1,600	1,515	31
Jun 2005	17,548	1,500	1,431	30
May 2005	16,621	1,520	1,409	31
Apr 2005	16,460	1,540	1,486	30
Mar 2005	16,438	1,560	1,497	31
Feb 2005	15,460	1,680	1,523	28
Jan 2005	16,043	1,610	1,565	31
Dec 2004	16,198	1,600	1,564	31
Nov 2004	15,926	1,580	1,554	30
Oct 2004	16,763	1,600	1,549	31
Sep 2004	16,804	1,640	1,571	30
Aug 2004	17,180	1,520	1,562	31
Jul 2004	17,389	1,620	1,560	31
Jun 2004	16,435	1,620	1,548	30
May 2004	16,819	1,620	1,518	31
Apr 2004	16,427	1,620	1,532	30
Mar 2004	16,281	1,640	1,546	31
Feb 2004	15,357	1,620	1,530	29
Jan 2004	17,508	1,640	1,552	31
Dec 2003	15,936	1,540	1,430	31
Nov 2003	15,944	1,520	1,434	30
Oct 2003	17,136	1,620	1,474	31
Sep 2003	16,636	1,580	1,390	29
Aug 2003	15,776	1,620	1,512	31
Jul 2003	18,305	1,640	1,543	31
Jun 2003	18,007	1,640	1,544	30
May 2003	18,917	1,580	1,495	31
Apr 2003	15,048	1,560	1,423	30
Mar 2003	13,200	1,520	1,325	26
Feb 2003	13,493	1,620	1,476	24
Jan 2003	16,783	1,630	1,524	31
Dec 2002	16,956	1,600	1,504	31
Nov 2002	17,172	1,690	1,547	30
Oct 2002	18,190	1,660	1,518	31
Sep 2002	17,323	1,550	1,379	30
Aug 2002	17,213	1,420	1,282	31
Jul 2002	17,698	1,480	1,320	31
Jun 2002	18,195	1,500	1,395	30
May 2002	20,056	1,440	1,386	31
Apr 2002	19,156	1,360	1,251	30
Mar 2002	17,284	1,100	1,072	31
Feb 2002	16,161	1,120	1,019	28
Jan 2002	15,736	1,000	922	31
Dec 2001	16,905	1,000	915	31
Nov 2001	14,154	880	798	30
Oct 2001	12,053	750	586	30
Sep 2001	5,378	550	457	16
Aug 2001	14,154	1,500	1,368	26
Jul 2001	16,809	1,620	1,506	31
Jun 2001	17,787	1,640	1,564	30
May 2001	17,805	1,630	1,510	31
Apr 2001	18,744	1,650	1,586	30
Mar 2001	18,633	1,700	1,604	31
Feb 2001	18,745	1,700	1,659	28
Jan 2001	18,447	1,600	1,580	31
Dec 2000	18,543	1,600	1,550	31
Nov 2000	15,907	1,580	1,500	30
Oct 2000	19,526	1,600	1,540	31
Sep 2000	14,811	1,620	1,326	26
Aug 2000	17,845	1,620	1,500	31
Jul 2000	17,383	1,660	1,500	31
Jun 2000	19,836	1,740	1,700	30
May 2000	20,977	1,610	1,610	31
Apr 2000	21,490	1,600	1,600	30
Mar 2000	21,903	1,560	1,200	31
Feb 2000	17,155	920	850	29
Jan 2000	18,079	800	720	31
Dec 1999	17,405	740	540	31
Nov 1999	15,428	650	200	30
Oct 1999	11,909	0	0	19
Sep 1999	—	—	—	—
Aug 1999	5,606	1,100	950	16
Jul 1999	10,397	1,080	960	31
Jun 1999	10,262	1,120	1,080	30
May 1999	10,751	1,120	1,100	31
Apr 1999	10,376	1,120	1,100	30
Mar 1999	10,509	1,140	1,100	31
Feb 1999	10,384	1,180	1,140	28
Jan 1999	12,047	1,150	1,120	31
Dec 1998	10,760	920	800	31
Nov 1998	9,852	1,120	940	27
Oct 1998	8,588	950	680	23
Sep 1998	8,773	1,240	1,120	23
Aug 1998	11,929	1,180	1,100	31
Jul 1998	11,929	1,180	1,100	31
Jun 1998	11,584	1,120	1,050	30
May 1998	11,941	990	860	31
Apr 1998	10,800	860	800	30
Mar 1998	10,915	760	700	31
Feb 1998	10,050	800	650	28
Jan 1998	16,258	1,180	880	31
Dec 1997	12,589	475	380	24
Nov 1997	—	—	—	—
Oct 1997	—	—	—	—
Sep 1997	—	—	—	—
Aug 1997	—	—	—	—
Jul 1997	—	—	—	—
Jun 1997	21,578	450	175	26
May 1997	—	—	—	—

A dash is a month the well filed with no figure in that column. An average pressure is shown only for a month the well filed once; where it filed twice the two averages cannot be recombined into one, so none is shown.

Formation tops

South Dakota records 17 formations for this well, shallowest first.

Formation	Top (ft)	Age
Greenhorn Limestone	3,505	Cretaceous
Mowry Shale	4,050	Cretaceous
Dakota Mud	4,506	Cretaceous
Pine Salt, Spearfish Formation	5,735	Permian
Minnekahta Limestone	6,052	Permian
Charles Formation	6,764	Mississippian
Mission Canyon Limestone	7,134	Mississippian
Lodgepole Limestone	7,551	Mississippian
Three Forks Shale	7,600	Devonian
Nisku Formation	8,070	Devonian
Duperow Formation	8,088	Devonian
Stonewall Limestone	8,500	Silurian/Ordovician
Stony Mountain Formation	8,558	Ordovician
Red River Formation	8,713	Ordovician
Unit A, Red River Formation	8,722	Ordovician
Unit B, Red River Formation	8,756	Ordovician
Unit C, Red River Formation	8,802	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.

Lateral 1 (Northeast)

InjectingWater Injection

Spudded

1996-11-15

Completed

1997-04-15

Measured depth

11,979 ft

True vertical depth

8,786 ft

Interval

Formation	Perforated (ft)
Unit B, Red River Formation	9,041–10,059

Location

45.851552, -103.662570

45.85155, -103.66257 · 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.