BBakken SubsurfaceNorth Dakota well index

Spacing unit · Dunn County

1,280-acre Bakken spacing unit

T150N R93W sections 30, 31

Spacing unit14 wells allowed · order 31536Reunion Bay-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T150N R93W sections 30, 31
Pool
Reunion Bay-Bakken
Zone
Zone X
County
Dunn County
Surveyed wells inside
11
Most wells operated by
Devon Energy
Unit id
dsu-7ddccb7a44b686c71b2e
Wells allowed by the latest linked order
14
Wells assigned to this unit
11
Pending permits inside
0
Balance under the allowance
+3
First linked order
Dec 30, 2009
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
9.64 two-mile laterals per 1,280 acres
Density drilled so far
11.56 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

MANDAREE SOUTH 30-31HELMANDAREE SOUTH 30-31HQMANDAREE 30-31HMANDAREE 30-31HAMANDAREE 30-31HWBEHR 30-31HIBEHR 30-31HUALFRED OLD DOG 30-31 HCALFRED OLD DOG 30-31 HYALFRED OLD DOG 30-31 HDALFRED OLD DOG 30-31 HZ1 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
MANDAREE SOUTH 30-31HELDEVON ENERGY WILLISTON, L.L.C.Active (A)15,056 ft100%
MANDAREE SOUTH 30-31HQDEVON ENERGY WILLISTON, L.L.C.Active (A)11,950 ft100%
MANDAREE 30-31HDEVON ENERGY WILLISTON, L.L.C.Active (A)11,433 ft100%
MANDAREE 30-31HADEVON ENERGY WILLISTON, L.L.C.Active (A)11,209 ft100%
MANDAREE 30-31HWDEVON ENERGY WILLISTON, L.L.C.Active (A)10,100 ft100%
BEHR 30-31HIDEVON ENERGY WILLISTON, L.L.C.Active (A)10,096 ft100%
BEHR 30-31HUDEVON ENERGY WILLISTON, L.L.C.Active (A)9,999 ft100%
ALFRED OLD DOG 30-31 HCDEVON ENERGY WILLISTON, L.L.C.Active (A)9,972 ft100%
ALFRED OLD DOG 30-31 HYDEVON ENERGY WILLISTON, L.L.C.Active (A)9,967 ft100%
ALFRED OLD DOG 30-31 HDDEVON ENERGY WILLISTON, L.L.C.Active (A)9,964 ft100%
ALFRED OLD DOG 30-31 HZDEVON ENERGY WILLISTON, L.L.C.Active (A)9,867 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 13984Case 11684Established the spacing unitZENERGY OPERATING CO., LLC.
  2. Order 14136Case 11948Designated the spacing unitZENERGY OPERATING CO., LLC
  3. Order 14945Case 12684Designated the spacing unitMARATHON OIL CO.
  4. Order 15256Case 12989Designated the spacing unit, 2 wells allowedMARATHON OIL CO.
  5. Order 17489Case 15244Pooled all interests in the unitDAKOTA-3 E&P CO., LLC
  6. Order 18909Case 16640Designated the spacing unit, 7 wells allowedMARATHON OIL CO.
  7. Order 19410Case 17142Established the spacing unit, 7 wells allowedWPX ENERGY WILLISTON, LLC
  8. Order 23347Case 21043Listed the unit in a pool zone table, 14 wells allowedMARATHON OIL CO.
  9. Order 23888Case 21546Established the spacing unit, 14 wells allowedWPX ENERGY WILLISTON, LLC

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

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