BBakken SubsurfaceNorth Dakota well index

Spacing unit · Williams County

2,560-acre Bakken spacing unit

T158N R99W sections 26, 35

Spacing unit4 wells allowed · order 35445Lone Tree Lake-Bakken

Unit facts

Formation
Bakken
Acres
2,560
Type
Spacing unit
Land described
T158N R99W sections 26, 35
Pool
Lone Tree Lake-Bakken
Zone
Zone X
County
Williams County
Surveyed wells inside
6
Most wells operated by
Chord / Enerplus / Oasis / Whiting
Unit id
dsu-2cec822eb2ec4b4d0d16
Wells allowed by the latest linked order
4
Wells assigned to this unit
4
Pending permits inside
0
Balance under the allowance
-2
First linked order
Apr 8, 2026
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
6.48 two-mile laterals per 1,280 acres
Density drilled so far
4.85 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

OPSAL 5799 42-11 4BOPSAL FEDERAL 5799 42-11 3BOPSAL FEDERAL 5799 42-11 2BOPSAL 5799 42-11 5BHELSTAD 157-99-2A-11-1HOPSAL 158-99-26A-35-1H1 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
OPSAL 5799 42-11 4BENERPLUS RESOURCES USA CORPORATIONDrilling (DRL)20,826 ft100%
OPSAL FEDERAL 5799 42-11 3BENERPLUS RESOURCES USA CORPORATIONDrilling (DRL)20,813 ft100%
OPSAL FEDERAL 5799 42-11 2BENERPLUS RESOURCES USA CORPORATIONDrilling (DRL)20,780 ft100%
OPSAL 5799 42-11 5BENERPLUS RESOURCES USA CORPORATIONDrilling (DRL)20,758 ft100%
HELSTAD 157-99-2A-11-1HENERPLUS RESOURCES USA CORPORATIONActive (A)9,887 ft100%
OPSAL 158-99-26A-35-1HENERPLUS RESOURCES USA CORPORATIONActive (A)9,632 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 35055Case 32300Established the spacing unit, 3 wells allowedOASIS PETROLEUM NORTH AMERICA LLC
  2. Order 35076Case 32321Pooled all interests in the unitOASIS PETROLEUM NORTH AMERICA LLC
  3. Order 35445Case 32599Established the spacing unit, 4 wells allowedOASIS PETROLEUM NORTH AMERICA 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

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