BBakken SubsurfaceNorth Dakota well index

Spacing unit · Mountrail County

640-acre Bakken spacing unit

T152N R92W section 31

Spacing unit6 wells allowed · order 34203Big Bend-Bakken

Unit facts

Formation
Bakken
Acres
640
Type
Spacing unit
Land described
T152N R92W section 31
Pool
Big Bend-Bakken
Zone
Zone IX
County
Mountrail County
Surveyed wells inside
10
Most wells operated by
Slawson
Unit id
dsu-9c72defafee9314c3847
Wells allowed by the latest linked order
6
Wells assigned to this unit
5
Pending permits inside
0
Balance under the allowance
-4
First linked order
Feb 3, 2010
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
9.25 two-mile laterals per 1,280 acres
Density drilled so far
8.75 per 1,280 acres

Room to drill: 0 laterals 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. 1 more would fit the density but not the spacing rule. 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

WHIRLWIND 1-31HWhirlcat Federal 5-31-19TFHWHIRLWIND 7-31TFHCougar Federal 1 SLHWhirlcat Federal 4-31-19TFHWHIRLWIND 2-31HWHIRLWIND 3-31HWHIRLWIND 6-31TFHJericho Federal 1 SLHMinx Federal 1 SLH1 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
WHIRLWIND 1-31HSLAWSON EXPLORATION COMPANY, INC.Active (A)5,211 ft96%
Whirlcat Federal 5-31-19TFHSLAWSON EXPLORATION COMPANY, INC.Active (A)5,124 ft33%
WHIRLWIND 7-31TFHSLAWSON EXPLORATION COMPANY, INC.Active (A)5,093 ft100%
Cougar Federal 1 SLHSLAWSON EXPLORATION COMPANY, INC.Active (A)5,082 ft50%
Whirlcat Federal 4-31-19TFHSLAWSON EXPLORATION COMPANY, INC.Active (A)5,028 ft33%
WHIRLWIND 2-31HSLAWSON EXPLORATION COMPANY, INC.Active (A)4,937 ft100%
WHIRLWIND 3-31HSLAWSON EXPLORATION COMPANY, INC.Active (A)4,911 ft100%
WHIRLWIND 6-31TFHSLAWSON EXPLORATION COMPANY, INC.Active (A)4,717 ft100%
Jericho Federal 1 SLHSLAWSON EXPLORATION COMPANY, INC.Active (A)2,287 ft32%
Minx Federal 1 SLHSLAWSON EXPLORATION COMPANY, INC.Active (A)2,252 ft30%

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 14136Case 11948Listed the unit in a pool zone table, 2 wells allowedZENERGY OPERATING CO., LLC
  2. Order 14867Case 12607Pooled all interests in the unitSLAWSON EXPLORATION CO., INC.
  3. Order 16861Case 14583Established the spacing unit, 6 wells allowedSLAWSON EXPLORATION CO., INC.
  4. Order 23051Case 20746Listed the unit in a pool zone table, 6 wells allowedMARATHON OIL CO.
  5. Order 21993Case 19687Established the spacing unit, 5 wells allowedSLAWSON EXPLORATION CO., INC.
  6. Order 23316Case 21010Listed the unit in a pool zone table, 5 wells allowedSLAWSON EXPLORATION CO., INC.
  7. Order 24511Case 22177Listed the unit in a pool zone table, 7 wells allowedSLAWSON EXPLORATION CO., INC.
  8. Order 24606Case 22272Established the spacing unit, 7 wells allowedSLAWSON EXPLORATION CO., INC.
  9. Order 31117Case 28574Established the spacing unit, 6 wells allowedSLAWSON EXPLORATION CO., INC.

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

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