BBakken SubsurfaceNorth Dakota well index

Spacing unit · Mountrail County

640-acre Bakken spacing unit

T152N R91W section 21

Spacing unit3 wells allowed · order 34203Big Bend-Bakken

Unit facts

Formation
Bakken
Acres
640
Type
Spacing unit
Land described
T152N R91W section 21
Pool
Big Bend-Bakken
Zone
Zone VI
County
Mountrail County
Surveyed wells inside
9
Most wells operated by
Slawson
Unit id
dsu-c61776a75f9db7b04f74
Wells allowed by the latest linked order
3
Wells assigned to this unit
3
Pending permits inside
0
Balance under the allowance
-6
First linked order
Jun 5, 2009
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
8.16 two-mile laterals per 1,280 acres
Density drilled so far
8.06 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. 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

Fish Finder 4-21-9HFisherman 5-21-28TFHFisherman 4-21-28HPayara 5 SLTFHFish Finder 5-21-9HSauger Federal 5 SLTFHPAYARA 3-21HPAYARA 2-21HPAYARA 1-21H1 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
Fish Finder 4-21-9HSLAWSON EXPLORATION COMPANY, INC.Active (A)5,133 ft39%
Fisherman 5-21-28TFHSLAWSON EXPLORATION COMPANY, INC.Active (A)5,089 ft50%
Fisherman 4-21-28HSLAWSON EXPLORATION COMPANY, INC.Active (A)5,036 ft50%
Payara 5 SLTFHSLAWSON EXPLORATION COMPANY, INC.Active (A)5,022 ft50%
Fish Finder 5-21-9HSLAWSON EXPLORATION COMPANY, INC.Active (A)4,939 ft40%
Sauger Federal 5 SLTFHSLAWSON EXPLORATION COMPANY, INC.Inactive (IA)4,774 ft48%
PAYARA 3-21HSLAWSON EXPLORATION COMPANY, INC.Active (A)4,177 ft100%
PAYARA 2-21HSLAWSON EXPLORATION COMPANY, INC.Active (A)4,127 ft100%
PAYARA 1-21HSLAWSON EXPLORATION COMPANY, INC.Active (A)3,932 ft100%

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 13231Case 11162Extended the spacing unitSLAWSON EXPLORATION CO., INC.
  2. Order 14127Case 11939Listed the unit in a pool zone table, 2 wells allowedEOG RESOURCES, INC.
  3. Order 14225Case 11912Pooled all interests in the unitSLAWSON EXPLORATION CO., INC.
  4. Order 16851Case 14573Listed the unit in a pool zone table, 6 wells allowedSPOTTED HAWK DEVELOPMENT, LLC
  5. Order 16860Case 14582Established the spacing unit, 6 wells allowedSLAWSON EXPLORATION CO., INC.
  6. Order 19539Case 17270Pooled all interests in the unitSLAWSON EXPLORATION CO., INC.
  7. Order 22209Case 19902Listed the unit in a pool zone table, 6 wells allowedWPX ENERGY WILLISTON, LLC
  8. Order 21993Case 19687Established the spacing unit, 3 wells allowedSLAWSON EXPLORATION CO., INC.
  9. Order 22417Case 20112Listed the unit in a pool zone table, 3 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

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