EHSRRU F-6H

API 4006320577 · Harding County, South Dakota · East Harding Springs field

ProducingOil

API

4006320577

Operator

Luff Exploration Co.

County

Harding

Field

East Harding Springs

Location

SENW Sec 06 Twp 022N Rng 06E

Permit

1695

Production

270 monthly filings with South Dakota, Jan 2004 to Jun 2026. Each product is in its own unit and the four are never added.

Cumulative oil

1,206,162 bbl

Cumulative gas

478,253 MCF

Cumulative water

1,611,457 bbl

Period	Oil (bbl)	Gas (MCF)	Water (bbl)	Days
Jun 2026	963	344	8,896	23
May 2026	1,063	379	9,056	23
Apr 2026	1,400	500	11,699	30
Mar 2026	1,619	578	12,100	31
Feb 2026	1,660	593	11,703	28
Jan 2026	1,856	663	12,866	31
Dec 2025	1,821	650	12,609	31
Nov 2025	1,727	616	11,832	30
Oct 2025	2,063	737	13,501	31
Sep 2025	1,977	706	13,247	30
Aug 2025	2,128	760	14,240	31
Jul 2025	1,792	640	13,585	31
Jun 2025	1,701	665	12,676	30
May 2025	1,874	733	13,719	31
Apr 2025	1,834	717	13,752	30
Mar 2025	1,839	719	13,473	30
Feb 2025	1,664	650	13,118	28
Jan 2025	2,035	796	16,871	31
Dec 2024	749	293	7,434	19
Nov 2024	489	191	4,559	13
Oct 2024	1,809	707	11,274	31
Sep 2024	1,931	755	12,762	30
Aug 2024	1,861	727	13,407	31
Jul 2024	1,662	650	12,804	31
Jun 2024	1,450	567	11,262	30
May 2024	1,443	697	11,432	31
Apr 2024	1,527	738	11,869	30
Mar 2024	1,611	778	12,235	31
Feb 2024	1,416	684	10,978	29
Jan 2024	1,689	816	12,881	31
Dec 2023	1,633	789	12,416	31
Nov 2023	1,758	849	12,235	30
Oct 2023	2,111	1,020	13,650	31
Sep 2023	2,242	1,083	14,024	30
Aug 2023	2,315	1,118	14,426	31
Jul 2023	2,336	1,129	14,502	31
Jun 2023	2,326	2,024	14,509	30
May 2023	2,139	1,861	14,423	28
Apr 2023	2,101	1,828	12,529	26
Mar 2023	2,578	2,243	16,192	31
Feb 2023	998	868	8,631	21
Jan 2023	528	460	6,226	17
Dec 2022	1,129	982	8,328	25
Nov 2022	1,470	1,279	10,626	30
Oct 2022	1,241	1,080	10,190	26
Sep 2022	708	616	6,806	18
Aug 2022	1,499	625	10,715	31
Jul 2022	1,535	640	10,448	31
Jun 2022	1,521	634	10,217	30
May 2022	1,703	710	11,099	31
Apr 2022	1,516	632	10,699	28
Mar 2022	1,263	527	8,947	27
Feb 2022	1,417	591	9,355	28
Jan 2022	1,604	669	10,211	31
Dec 2021	1,645	686	10,206	31
Nov 2021	1,702	710	10,877	30
Oct 2021	1,309	546	9,330	26
Sep 2021	1,515	632	9,677	30
Aug 2021	1,552	647	10,226	31
Jul 2021	1,520	634	9,793	31
Jun 2021	1,513	631	9,638	30
May 2021	1,579	659	9,958	31
Apr 2021	1,589	666	9,722	30
Mar 2021	1,648	691	10,023	31
Feb 2021	1,545	648	9,156	28
Jan 2021	1,694	710	10,447	31
Dec 2020	1,754	735	11,118	31
Nov 2020	1,720	721	10,360	30
Oct 2020	1,845	773	10,506	31
Sep 2020	1,768	741	9,774	30
Aug 2020	1,888	791	10,542	31
Jul 2020	1,912	801	10,572	31
Jun 2020	1,854	777	9,954	30
May 2020	1,953	818	10,212	31
Apr 2020	1,878	875	9,986	30
Mar 2020	1,060	494	6,846	20
Feb 2020	1,726	804	9,459	29
Jan 2020	1,907	889	10,089	31
Dec 2019	1,952	910	10,410	31
Nov 2019	1,919	894	10,088	30
Oct 2019	2,028	945	10,213	31
Sep 2019	1,932	900	9,774	30
Aug 2019	1,953	910	9,728	31
Jul 2019	2,033	948	9,731	31
Jun 2019	2,062	961	9,446	30
May 2019	2,180	1,016	9,658	31
Apr 2019	2,162	886	9,174	30
Mar 2019	2,209	906	9,086	31
Feb 2019	2,070	849	8,448	28
Jan 2019	2,213	907	9,109	31
Dec 2018	2,271	931	9,531	31
Nov 2018	1,468	602	7,518	22
Oct 2018	2,392	981	10,674	31
Sep 2018	2,335	957	10,152	30
Aug 2018	2,294	941	9,823	31
Jul 2018	1,882	772	8,883	31
Jun 2018	1,702	698	7,886	30
May 2018	2,033	748	8,576	31
Apr 2018	2,122	777	8,769	30
Mar 2018	1,780	655	7,486	26
Feb 2018	2,325	855	8,554	28
Jan 2018	2,646	974	—	31
Dec 2017	2,717	1,000	9,736	31
Nov 2017	2,735	1,007	9,241	30
Oct 2017	3,012	1,108	9,472	31
Sep 2017	2,867	1,055	8,979	30
Aug 2017	3,178	1,170	9,359	31
Jul 2017	2,366	871	7,626	31
Jun 2017	1,865	686	6,423	30
May 2017	2,146	790	6,799	31
Apr 2017	2,315	736	6,842	30
Mar 2017	2,566	816	7,273	31
Feb 2017	2,610	830	7,073	28
Jan 2017	2,540	808	7,455	28
Dec 2016	3,067	975	7,870	30
Nov 2016	3,320	1,056	7,845	30
Oct 2016	3,435	1,092	7,701	31
Sep 2016	2,675	851	6,064	25
Aug 2016	3,378	1,074	7,001	31
Jul 2016	3,601	1,145	7,019	31
Jun 2016	3,644	1,159	6,750	30
May 2016	3,974	1,295	6,908	31
Apr 2016	3,999	1,304	6,662	30
Mar 2016	3,089	1,007	5,335	24
Feb 2016	4,168	1,359	6,364	29
Jan 2016	3,493	1,139	5,864	27
Dec 2015	3,999	1,304	5,695	28
Nov 2015	4,279	1,395	6,394	30
Oct 2015	4,326	1,410	6,319	30
Sep 2015	4,378	1,427	6,093	30
Aug 2015	4,594	1,498	6,727	31
Jul 2015	4,590	1,496	6,888	31
Jun 2015	4,419	1,441	6,418	30
May 2015	4,647	1,543	6,762	31
Apr 2015	4,614	1,532	6,500	30
Mar 2015	4,826	1,602	6,509	31
Feb 2015	4,421	1,468	5,780	28
Jan 2015	4,950	1,644	6,332	31
Dec 2014	4,661	1,548	6,072	31
Nov 2014	4,880	1,620	6,046	30
Oct 2014	5,056	1,679	6,132	31
Sep 2014	4,593	1,525	6,005	28
Aug 2014	5,097	1,692	7,201	31
Jul 2014	5,136	1,335	7,007	31
Jun 2014	4,946	1,286	6,724	30
May 2014	3,064	797	4,632	21
Apr 2014	4,742	1,233	5,883	30
Mar 2014	5,051	1,313	6,091	31
Feb 2014	4,584	1,192	5,361	28
Jan 2014	5,123	1,332	5,899	31
Dec 2013	5,123	1,332	5,668	31
Nov 2013	5,017	1,304	5,361	30
Oct 2013	4,724	1,228	5,625	29
Sep 2013	5,075	1,319	6,369	30
Aug 2013	5,285	1,374	6,349	31
Jul 2013	5,364	1,384	6,291	31
Jun 2013	5,099	1,316	5,771	30
May 2013	5,261	1,357	5,841	31
Apr 2013	5,230	1,349	5,799	30
Mar 2013	5,177	1,336	6,145	30
Feb 2013	5,021	1,295	6,042	28
Jan 2013	5,703	1,471	6,661	31
Dec 2012	5,675	1,464	6,342	31
Nov 2012	5,499	1,416	5,909	30
Oct 2012	3,600	929	4,234	21
Sep 2012	5,436	1,402	5,248	30
Aug 2012	5,653	1,459	5,214	31
Jul 2012	5,273	1,360	4,128	28
Jun 2012	5,384	1,400	3,958	28
May 2012	6,149	1,599	4,152	31
Apr 2012	5,516	1,434	3,689	28
Mar 2012	6,398	1,664	3,917	31
Feb 2012	6,103	1,587	3,503	29
Jan 2012	6,656	1,730	4,057	31
Dec 2011	6,488	1,687	4,092	31
Nov 2011	4,589	1,193	2,530	23
Oct 2011	6,530	1,698	3,362	31
Sep 2011	6,104	1,587	3,093	30
Aug 2011	5,763	1,498	2,478	27
Jul 2011	6,883	1,790	3,323	31
Jun 2011	6,130	1,962	2,649	28
May 2011	6,340	2,029	2,278	28
Apr 2011	7,148	2,287	2,240	30
Mar 2011	6,927	2,217	2,222	30
Feb 2011	6,618	2,118	1,892	28
Jan 2011	7,375	2,360	2,034	31
Dec 2010	7,242	2,317	1,961	31
Nov 2010	6,919	2,214	1,858	30
Oct 2010	7,013	2,244	1,846	31
Sep 2010	7,025	2,248	1,695	30
Aug 2010	7,409	2,371	1,684	31
Jul 2010	7,863	2,516	1,630	31
Jun 2010	6,315	2,021	1,391	26
May 2010	6,807	2,178	1,145	29
Apr 2010	7,978	2,122	1,124	30
Mar 2010	8,541	2,272	949	31
Feb 2010	8,313	2,211	499	28
Jan 2010	8,139	2,165	286	27
Dec 2009	8,623	2,294	371	30
Nov 2009	8,500	2,261	306	30
Oct 2009	8,903	2,368	325	31
Sep 2009	8,667	2,305	308	30
Aug 2009	8,891	2,365	327	31
Jul 2009	8,871	2,360	309	31
Jun 2009	8,814	2,344	298	30
May 2009	9,098	2,420	306	31
Apr 2009	9,018	2,399	316	30
Mar 2009	8,559	2,790	280	29
Feb 2009	8,525	2,779	291	28
Jan 2009	9,508	3,100	322	31
Dec 2008	9,603	3,131	323	31
Nov 2008	8,545	2,786	263	28
Oct 2008	9,772	3,186	298	31
Sep 2008	9,518	3,103	274	30
Aug 2008	9,681	3,156	284	31
Jul 2008	9,525	3,105	268	31
Jun 2008	9,241	3,013	255	30
May 2008	7,779	2,536	166	25
Apr 2008	9,584	1,763	277	30
Mar 2008	10,009	1,842	281	31
Feb 2008	9,398	1,729	250	29
Jan 2008	6,844	1,259	158	22
Dec 2007	7,348	1,352	272	28
Nov 2007	7,658	1,409	107	30
Oct 2007	7,804	1,436	184	31
Sep 2007	7,248	1,334	166	29
Aug 2007	7,772	1,480	161	31
Jul 2007	7,776	1,501	181	31
Jun 2007	7,300	1,414	163	30
May 2007	7,748	1,426	189	31
Apr 2007	7,533	6,456	185	30
Mar 2007	7,731	6,626	182	31
Feb 2007	6,913	5,924	207	28
Jan 2007	7,243	6,207	291	31
Dec 2006	6,551	5,614	337	31
Nov 2006	5,389	4,618	391	30
Oct 2006	4,075	3,492	313	31
Sep 2006	3,908	3,349	325	30
Aug 2006	4,237	3,631	349	31
Jul 2006	4,267	3,657	349	31
Jun 2006	4,360	3,736	343	30
May 2006	3,843	3,294	306	31
Apr 2006	3,574	2,137	262	25
Mar 2006	4,761	6,303	355	31
Feb 2006	4,100	5,429	289	28
Jan 2006	4,654	6,162	356	31
Dec 2005	4,952	6,556	405	31
Nov 2005	5,036	6,667	366	30
Oct 2005	5,506	7,290	408	31
Sep 2005	5,503	4,983	401	29
Aug 2005	5,958	7,015	419	30
Jul 2005	4,677	4,485	312	31
Jun 2005	6,143	5,891	395	30
May 2005	6,801	6,522	425	31
Apr 2005	6,985	6,698	412	30
Mar 2005	7,562	2,745	396	31
Feb 2005	7,328	2,660	343	28
Jan 2005	8,528	3,096	367	31
Dec 2004	8,853	3,214	335	31
Nov 2004	8,883	3,225	319	30
Oct 2004	9,475	3,439	337	31
Sep 2004	9,395	3,410	314	30
Aug 2004	9,848	3,575	327	31
Jul 2004	9,989	3,626	331	31
Jun 2004	9,730	3,532	343	30
May 2004	10,354	3,759	366	31
Apr 2004	10,158	3,687	405	30
Mar 2004	10,762	3,907	640	31
Feb 2004	9,810	4,238	1,264	29
Jan 2004	6,678	2,885	2,611	23

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

Formation tops

South Dakota records 22 formations for this well, shallowest first.

Formation	Top (ft)	Age
Eagle Sandstone Member, Pierre Shale	2,141	Cretaceous
Niobrara Formation	3,029	Cretaceous
Greenhorn Limestone	3,592	Cretaceous
Mowry Shale	4,103	Cretaceous
Dakota Mud	4,505	Cretaceous
Piper Formation	5,439	Triassic
Spearfish Formation	5,773	Triassic/Permian
Minnekahta Limestone	5,933	Permian
Minnelusa Formation	6,052	Permian/Pennsylvanian
Kibbey Formation	6,612	Mississippian
Charles Formation	6,704	Mississippian
Mission Canyon Limestone	7,037	Mississippian
Lodgepole Limestone	7,470	Mississippian
Three Forks Shale	7,550	Devonian
Nisku Formation	8,055	Devonian
Duperow Formation	8,088	Devonian
Souris River Formation	8,256	Devonian
Stonewall Limestone	8,621	Silurian/Ordovician
Gunton Member, Stony Mountain Formation	8,676	Ordovician
Stony Mountain Formation	8,772	Ordovician
Red River Formation	8,794	Ordovician
Unit B, Red River Formation	8,831	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 (Southeast)

ProducingOil

Spudded

2003-10-16

Completed

2003-12-03

Measured depth

14,877 ft

True vertical depth

8,884 ft

Interval

Formation	Perforated (ft)
Unit B, Red River Formation	9,105–14,877

Location

45.902914, -103.429873

45.90291, -103.42987 · 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.