BBakken SubsurfaceNorth Dakota well index

Spacing unit · Williams County

1,280-acre Bakken spacing unit

T154N R101W sections 4, 9

Spacing unit8 wells allowed · order 32450Todd-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T154N R101W sections 4, 9
Pool
Todd-Bakken
Zone
Zone IV
County
Williams County
Surveyed wells inside
6
Most wells operated by
Devon Energy
Unit id
dsu-29aed682778ec799d147
Wells allowed by the latest linked order
8
Wells assigned to this unit
6
Pending permits inside
0
Balance under the allowance
+2
First linked order
Oct 28, 2009
Laterals that still fit (Nov 2026 method)
1 (0.95 two-mile equivalents)
Neighbourhood target density
6.94 two-mile laterals per 1,280 acres
Density drilled so far
5.92 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. 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

ORVILLE 4-9 #1-HORVILLE 4-9 #2-HORVILLE 4-9 3HORVILLE 4-9 4HORVILLE 4-9 5HORVILLE 4-9 6H1 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
ORVILLE 4-9 #1-HDEVON ENERGY WILLISTON, L.L.C.Active (A)11,408 ft100%
ORVILLE 4-9 #2-HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,591 ft100%
ORVILLE 4-9 3HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,224 ft100%
ORVILLE 4-9 4HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,170 ft100%
ORVILLE 4-9 5HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,142 ft100%
ORVILLE 4-9 6HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,789 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 13737Case 11603Established the spacing unit, 1 well allowedBRIGHAM OIL & GAS, LP
  2. Order 13737Case 11603Designated the spacing unitBRIGHAM OIL & GAS, LP
  3. Order 15528Case 13255Designated the spacing unitCONTINENTAL RESOURCES, INC.
  4. Order 16105Case 13821Designated the spacing unit, 4 wells allowedBRIGHAM OIL & GAS, L.P.
  5. Order 16141Case 13857Established the spacing unit, 4 wells allowedBRIGHAM OIL & GAS, L.P.
  6. Order 17533Case 15288Pooled all interests in the unitBRIGHAM OIL & GAS, L.P.
  7. Order 20147Case 17878Designated the spacing unit, 8 wells allowedZENERGY, INC.
  8. Order 20254Case 17985Established the spacing unit, 8 wells allowedBRIGHAM OIL & GAS, LP

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.