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EHSRRU C-8H

API 4006320579 · Harding County, South Dakota · East Harding Springs field

ProducingOil
API
4006320579
Operator
Luff Exploration Co.
County
Harding
Field
East Harding Springs
Location
NENW Sec 08 Twp 022N Rng 06E
Permit
1705

Production

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

Cumulative oil
105,065 bbl
Cumulative gas
73,454 MCF
Cumulative water
188,207 bbl
PeriodOil (bbl)Gas (MCF)Water (bbl)Days
Jun 20263705589930
May 2026462691,22831
Apr 20261532341714
Mar 2026392581,25029
Feb 20261492244610
Jan 20262263452221
Dec 20253325077031
Nov 20253054571930
Oct 20253144774331
Sep 20253084668630
Aug 20253054568031
Jul 20253214873631
Jun 202529611169930
May 202532512286031
Apr 202532012088330
Mar 202533212592231
Feb 202530811678328
Jan 202530811680124
Dec 202430311462130
Nov 202430811671630
Oct 202432312174231
Sep 202430711668230
Aug 202431211770031
Jul 202431311869131
Jun 202430711566930
May 202421516168731
Apr 202432416569030
Mar 202429615263431
Feb 202431816355729
Jan 202431916369731
Dec 202335117966631
Nov 202331716268330
Oct 202331716270831
Sep 202333417160130
Aug 202334317572831
Jul 202334417673031
Jun 20233357470230
May 20233327366731
Apr 20233347466730
Mar 20233527868131
Feb 20232966560428
Jan 20233577970831
Dec 20223257266928
Nov 20223327369430
Oct 20223467670431
Sep 20223327367830
Aug 20223248369831
Jul 20223348666431
Jun 20223458966530
May 20223589270331
Apr 20223458958727
Mar 20223529162931
Feb 20223087956228
Jan 20223759765531
Dec 20213549164231
Nov 20213519053630
Oct 20213699560231
Sep 20213569258630
Aug 20213539148329
Jul 20213619342031
Jun 20213509043030
May 20213709547431
Apr 202137912553130
Mar 202132210744522
Feb 202132610842128
Jan 202134911652531
Dec 202036612161731
Nov 202035311749430
Oct 202035311751931
Sep 202036212053629
Aug 202037512453931
Jul 202037912558831
Jun 202038112657930
May 202036512155131
Apr 202036212453730
Mar 202037512850231
Feb 202035712248929
Jan 202038513257631
Dec 201938813358231
Nov 201938613258430
Oct 201937712964031
Sep 201937312865730
Aug 201934111752725
Jul 201937512862931
Jun 201935017856430
May 201937631059931
Apr 201938119367830
Mar 201940320565531
Feb 201933717156628
Jan 201937018862631
Dec 201839019862129
Nov 201837519056830
Oct 201838719676431
Sep 201835818355830
Aug 201835518056630
Jul 201838019458731
Jun 201835017856430
May 201837631059931
Apr 201836930455830
Mar 201838231559231
Feb 201835028855828
Jan 2018394325—31
Dec 201728531763431
Nov 201728531764630
Oct 201738731963831
Sep 201735829558027
Aug 201739432464131
Jul 201740233164531
Jun 201737430861030
May 201741534269731
Apr 201739410165230
Mar 201743311173631
Feb 201744111372228
Jan 20172496440014
Dec 20163699557130
Nov 201639310169030
Oct 201640810570431
Sep 201639210170030
Aug 201641810774031
Jul 201646211979331
Jun 201644811580230
May 20165447997831
Apr 20163374929213
Mar 20163164617110
Feb 2016————
Jan 20161472125710
Dec 20155317795731
Nov 2015561811,00930
Oct 2015671971,26831
Sep 20157392511,53830
Aug 20157502551,56327
Jul 2015————
Jun 2015————
May 2015————
Apr 2015————
Mar 2015————
Feb 2015————
Jan 2015————
Dec 20142046936619
Nov 201435812263730
Oct 201435412067331
Sep 201435912263330
Aug 201436912572731
Jul 201436857268431
Jun 201436256270430
May 201433552065031
Apr 201433351862030
Mar 201434753966831
Feb 201432250061728
Jan 201436857271331
Dec 201335555273731
Nov 201335755579830
Oct 201339361089029
Sep 20134567101,07130
Aug 201332049869812
Jul 20131241922738
Jun 20131672603086
May 201312719725014
Apr 201328844860130
Mar 201329145258831
Feb 201328444267528
Jan 201332851082031
Dec 201231148482531
Nov 201228944972430
Oct 201229746278531
Sep 201228043571130
Aug 201228043680031
Jul 201228644471631
Jun 201227228979630
May 201228930890731
Apr 201227128994030
Mar 20122712891,06231
Feb 20122802981,34829
Jan 20123213422,09631
Dec 20113864113,20031
Nov 20113483712,48223
Oct 2011————
Sep 2011————
Aug 2011————
Jul 2011————
Jun 2011————
May 2011————
Apr 2011————
Mar 2011————
Feb 2011————
Jan 2011————
Dec 2010————
Nov 2010————
Oct 2010————
Sep 2010————
Aug 2010————
Jul 2010————
Jun 2010————
May 2010————
Apr 2010————
Mar 2010————
Feb 2010————
Jan 201016417450721
Dec 200925126775031
Nov 200923725274130
Oct 200926227974831
Sep 200924926670630
Aug 200924826470431
Jul 200926328075031
Jun 200924826469530
May 200927229075431
Apr 200924826465930
Mar 200930326957030
Feb 200924922160328
Jan 200928525469731
Dec 200829326075231
Nov 200829025880028
Oct 200833629990731
Sep 200831828388230
Aug 200832028587031
Jul 200833329692931
Jun 200831728284930
May 200828024967017
Apr 200832539481730
Mar 200833440549431
Feb 200828935059329
Jan 200833140174031
Dec 200735042478231
Nov 200733740975530
Oct 200736143879831
Sep 200733941174429
Aug 200738446586931
Jul 200743753089831
Jun 200751662690530
May 200752463595931
Apr 200751294893730
Mar 200752797594731
Feb 200748189082928
Jan 200753198396031
Dec 200653298496131
Nov 200652496994830
Oct 200644983193415
Sep 200645984991430
Aug 200649691797531
Jul 20065259721,02531
Jun 20065411,0001,02630
May 20065651,0461,03731
Apr 200653582491025
Mar 200660893693831
Feb 200654984688828
Jan 20066249611,00031
Dec 20056601,0171,01731
Nov 20056591,0151,04030
Oct 20057041,0841,07031
Sep 20057329021,05130
Aug 20057861,2101,10831
Jul 20058234921,12331
Jun 20058475061,12330
May 20059165481,21329
Apr 20059815871,29030
Mar 20051,1904321,52231
Feb 20051,0183701,20021
Jan 20051,7126212,00330
Dec 20041,9727162,16831
Nov 20042,2408132,15030
Oct 20041,8006532,01423
Sep 20041,6546001,53830
Aug 20042,9601,0742,55231
Jul 20046,1722,2404,82531

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

Formation tops

South Dakota records 26 formations for this well, shallowest first.

FormationTop (ft)Age
Eagle Sandstone Member, Pierre Shale2,171Cretaceous
Niobrara Formation3,097Cretaceous
Greenhorn Limestone3,626Cretaceous
Mowry Shale4,122Cretaceous
Dakota Mud4,517Cretaceous
Piper Formation5,461Triassic
Spearfish Formation5,797Triassic/Permian
Minnekahta Limestone5,954Permian
Opeche Shale5,995Permian
Minnelusa Formation6,106Permian/Pennsylvanian
Kibbey Formation6,640Mississippian
Charles Formation6,738Mississippian
Mission Canyon Limestone7,072Mississippian
Lodgepole Limestone7,510Mississippian
Three Forks Shale7,600Devonian
Nisku Formation8,093Devonian
Duperow Formation8,126Devonian
Souris River Formation8,303Devonian
Interlake Dolomite8,349Silurian
Stonewall Limestone8,670Silurian/Ordovician
Gunton Member, Stony Mountain Formation8,728Ordovician
Stoughton Member, Stony Mountain Formation8,767Ordovician
Red River Formation8,846Ordovician
Unit A, Red River Formation8,854Ordovician
Unit B, Red River Formation8,882Ordovician
Unit C, Red River Formation8,931Ordovician

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

Completions

South Dakota files 2 completion reports for this well, one for each bore of the well.

Lateral 1 (Southeast)

ProducingOil
Spudded
2004-04-06
Completed
2004-06-21
Measured depth
11,542 ft
True vertical depth
8,871 ft

Interval

FormationPerforated (ft)
Unit B, Red River Formation8,974–11,542

Lateral 2 (Southwest)

ProducingOil
Spudded
2004-04-06
Completed
2004-06-21
Measured depth
11,637 ft
True vertical depth
8,876 ft

Interval

FormationPerforated (ft)
Unit B, Red River Formation8,929–11,637

Location

45.889135, -103.410536

45.88914, -103.41054 · Surface location as filed with South Dakota

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.