BBakken SubsurfaceNorth Dakota well index

Spacing unit · Mountrail County

1,280-acre Bakken spacing unit

T153N R91W sections 20, 21

Spacing unit11 wells allowed · order 35866Sanish-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T153N R91W sections 20, 21
Pool
Sanish-Bakken
Zone
Zone XXIII
County
Mountrail County
Surveyed wells inside
9
Most wells operated by
Chord / Enerplus / Oasis / Whiting
Unit id
dsu-ec4fe0e73f6295255915
Wells allowed by the latest linked order
11
Wells assigned to this unit
5
Pending permits inside
0
Balance under the allowance
+2
First linked order
Oct 26, 2007
Laterals that still fit (Nov 2026 method)
1 (0.95 two-mile equivalents)
Neighbourhood target density
8.8 two-mile laterals per 1,280 acres
Density drilled so far
6.36 per 1,280 acres

Room to drill: 1 lateral still fit at the density this unit's neighbourhood has reached (the larger of the 75th percentile of mature units within 10 miles and the median of units drilled in the last three years), placed in the widest gaps with the setbacks of the November 2026 method. Machine-made and geometric: not a commitment to drill, not a permit, order, lease or plan, and no economics. Land is counted once, so a unit under a larger unit shows only what the larger one left. How it is computed.

Map

SMITH 11-20HHANSEN 12-20HFLADELAND 12-20TFHHANSEN 13-20TFXHANSEN 21-20TFHHANSEN 21-20HLittlefield 11-21HUHANSEN 14-20XHLittlefield 11-21-2HU1 mi

DMR footprint (NAD83) with the published surface locations of its wells. Laterals run under the unit; pads often sit on a neighbouring section.

Open in the regional 3D viewerFootprint, wells and production playbackSee on the cases and orders mapHistorical spacing units by order

Wells inside the unit

WellOperatorStatusLateral inside
SMITH 11-20HWHITING OIL AND GAS CORPORATIONActive (A)9,771 ft100%
HANSEN 12-20HWHITING OIL AND GAS CORPORATIONActive (A)9,580 ft100%
FLADELAND 12-20TFHWHITING OIL AND GAS CORPORATIONPlugged and abandoned (PA)9,455 ft100%
HANSEN 13-20TFXWHITING OIL AND GAS CORPORATIONActive (A)8,645 ft87%
HANSEN 21-20TFHWHITING OIL AND GAS CORPORATIONActive (A)8,415 ft100%
HANSEN 21-20HWHITING OIL AND GAS CORPORATIONActive (A)8,014 ft100%
Littlefield 11-21HUWHITING OIL AND GAS CORPORATIONActive (A)4,714 ft32%
HANSEN 14-20XHWHITING OIL AND GAS CORPORATIONActive (A)4,466 ft46%
Littlefield 11-21-2HUWHITING OIL AND GAS CORPORATIONActive (A)3,974 ft41%

Surveyed Bakken-system laterals with at least 660 ft of plan-view length inside the published footprint. Geometric membership, not a legal assignment; a lateral can cross several units.

Order history

  1. Order 11399Case 9687Designated the spacing unitWHITING OIL & GAS CORP.
  2. Order 11400Case 9688Established the spacing unitWHITING OIL & GAS CORP
  3. Order 11401Case 9689Pooled all interests in the unitWHITING OIL & GAS CORPORATION
  4. Order 13904Case 11743Designated the spacing unit, 4 wells allowedWHITING OIL & GAS CORP.
  5. Order 15653Case 13377Established the spacing unit, 6 wells allowedWHITING OIL & GAS CORP.
  6. Order 23196Case 20890Designated the spacing unit, 6 wells allowedMUREX PETROLEUM CORP.
  7. Order 22284Case 19977Designated the spacing unit, 8 wells allowedFIDELITY EXPLORATION & PRODUCTION CO.
  8. Order 22284Case 19977Listed the unit in a pool zone table, 6 wells allowedFIDELITY EXPLORATION & PRODUCTION CO.
  9. Order 22761Case 20455Designated the spacing unit, 8 wells allowedOASIS PETROLEUM NORTH AMERICA LLC
  10. Order 23316Case 21010Designated the spacing unit, 8 wells allowedSLAWSON EXPLORATION CO., INC.
  11. Order 23552Case 21248Designated the spacing unit, 6 wells allowedOASIS PETROLEUM NORTH AMERICA LLC
  12. Order 22755Case 20449Established the spacing unit, 11 wells allowedWHITING OIL AND GAS CORP.
  13. Order 24404Case 22070Designated the spacing unit, 11 wells allowedOASIS PETROLEUM NORTH AMERICA LLC
  14. Order 31505Case 28954Designated the spacing unitWHITING OIL AND GAS CORP.

Facts extracted from signed NDIC orders whose land description covers this footprint; machine-extracted and not human-reviewed. A stated allowance is what that order allowed, not proof that it governs today.

Overlapping units

16 other units share a surveyed well with this one; overlapping units are not additive.