BBakken SubsurfaceNorth Dakota well index

Spacing unit · Mountrail County

1,280-acre Bakken spacing unit

T156N R93W sections 20, 29

Spacing unit8 wells allowed · order 35988Alger-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T156N R93W sections 20, 29
Pool
Alger-Bakken
Zone
Zone XI
County
Mountrail County
Surveyed wells inside
7
Most wells operated by
Devon Energy
Unit id
dsu-5cddc14dac955dce42fd
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
Nov 5, 2008
Laterals that still fit (Nov 2026 method)
1 (0.95 two-mile equivalents)
Neighbourhood target density
8.11 two-mile laterals per 1,280 acres
Density drilled so far
6.52 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. 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

LIFFRIG 29-20 6TFHLIFFRIG 29-20 7HLIFFRIG 29-20 #3TFHLIFFRIG 29-20 5HLIFFRIG 29-20 #2HLIFFRIG 29-20 #4HLIFFRIG 29-20 #1TFH1 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
LIFFRIG 29-20 6TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)10,853 ft100%
LIFFRIG 29-20 7HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,135 ft100%
LIFFRIG 29-20 #3TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)9,743 ft100%
LIFFRIG 29-20 5HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,663 ft100%
LIFFRIG 29-20 #2HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,560 ft100%
LIFFRIG 29-20 #4HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,527 ft100%
LIFFRIG 29-20 #1TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)9,231 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 12534Case 10596Established the spacing unitBRIGHAM OIL AND GAS, LP
  2. Order 12492Case 10560Designated the spacing unitOASIS PETROLEUM NORTH AMERICA LLC
  3. Order 14747Case 12490Pooled all interests in the unitBRIGHAM OIL & GAS, L.P.
  4. Order 16139Case 13855Designated the spacing unitBRIGHAM OIL & GAS, L.P.
  5. Order 16284Case 14009Designated the spacing unit, 4 wells allowedBRIGHAM OIL & GAS, L.P.
  6. Order 17383Case 15135Established the spacing unit, 4 wells allowedBRIGHAM OIL & GAS, L.P.
  7. Order 17856Case 15610Designated the spacing unit, 8 wells allowedSLAWSON EXPLORATION CO., INC.
  8. 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.

Overlapping units

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