BBakken SubsurfaceNorth Dakota well index

Spacing unit · Mountrail County

1,280-acre Bakken spacing unit

T155N R92W sections 16, 21

Spacing unit8 wells allowed · order 35988Alger-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T155N R92W sections 16, 21
Pool
Alger-Bakken
Zone
Zone XI
County
Mountrail County
Surveyed wells inside
7
Most wells operated by
Devon Energy
Unit id
dsu-6745850517f61b94e12b
Wells allowed by the latest linked order
8
Wells assigned to this unit
7
Pending permits inside
0
Balance under the allowance
+1
First linked order
Dec 21, 2009
Laterals that still fit (Nov 2026 method)
2 (1.9 two-mile equivalents)
Neighbourhood target density
8.91 two-mile laterals per 1,280 acres
Density drilled so far
6.77 per 1,280 acres

Room to drill: 2 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

ALGER STATE 16-21 #5HALGER STATE 16-21 4TFHALGER STATE 16-21 #6TFHALGER STATE 16-21 7HALGER STATE 16-21 3HALGER STATE 16-21 2TFHALGER STATE 16-21 1-H1 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
ALGER STATE 16-21 #5HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,321 ft100%
ALGER STATE 16-21 4TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)10,214 ft100%
ALGER STATE 16-21 #6TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)10,201 ft100%
ALGER STATE 16-21 7HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,182 ft100%
ALGER STATE 16-21 3HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,161 ft100%
ALGER STATE 16-21 2TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)10,054 ft100%
ALGER STATE 16-21 1-HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,038 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 13908Case 11747Designated the spacing unitHESS CORP.
  2. Order 16139Case 13855Designated the spacing unitBRIGHAM OIL & GAS, L.P.
  3. Order 16925Case 14647Pooled all interests in the unitBRIGHAM OIL & GAS, L.P.
  4. Order 16284Case 14009Designated the spacing unit, 4 wells allowedBRIGHAM OIL & GAS, L.P.
  5. Order 17383Case 15135Established the spacing unit, 4 wells allowedBRIGHAM OIL & GAS, L.P.
  6. Order 17856Case 15610Designated the spacing unit, 8 wells allowedSLAWSON EXPLORATION CO., INC.
  7. Order 18076Case 15821Established the spacing unit, 8 wells allowedBRIGHAM OIL & GAS, L.P.

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.