BBakken SubsurfaceNorth Dakota well index

Spacing unit · Williams County

2,560-acre Bakken spacing unit

T155N R101W sections 1, 12

Spacing unitCow Creek-Bakken

Unit facts

Formation
Bakken
Acres
2,560
Type
Spacing unit
Land described
T155N R101W sections 1, 12
Pool
Cow Creek-Bakken
Zone
Zone IV
County
Williams County
Surveyed wells inside
14
Most wells operated by
OASIS PETROLEUM NORTH AMERICA LLC
Unit id
dsu-3361aa98c780c143e181
Laterals that still fit (Nov 2026 method)
1 (0.95 two-mile equivalents)
Neighbourhood target density
7.49 two-mile laterals per 1,280 acres
Density drilled so far
6.65 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

TUFTO 6-7-18-19F 4TFHTUFTO 6-7-18-19F 3HTUFTO 6-7-18-19F 2TFHTUFTO 6-7-18-19F 1HTUFTO 6-7-18-19F 5HNADINE BOB 5501 11-1TL. TUFTO 7-6 1-HKALEB 5501 12-1BVAUGHN BECKY 5501 11-1BMARLENE 5501 14-1TCORNELL 5501 14-1 8T2CORNELL 5501 13-1HHERB 5501 14-1BHANNAH KAYDENCE 5501 12-1T1 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
TUFTO 6-7-18-19F 4TFHDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)10,813 ft50%
TUFTO 6-7-18-19F 3HDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)10,383 ft48%
TUFTO 6-7-18-19F 2TFHDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)10,347 ft53%
TUFTO 6-7-18-19F 1HDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)10,338 ft50%
TUFTO 6-7-18-19F 5HDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)10,225 ft50%
NADINE BOB 5501 11-1TOASIS PETROLEUM NORTH AMERICA LLCActive (A)9,865 ft100%
L. TUFTO 7-6 1-HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,719 ft100%
KALEB 5501 12-1BOASIS PETROLEUM NORTH AMERICA LLCActive (A)9,652 ft100%
VAUGHN BECKY 5501 11-1BOASIS PETROLEUM NORTH AMERICA LLCActive (A)9,626 ft100%
MARLENE 5501 14-1TOASIS PETROLEUM NORTH AMERICA LLCActive (A)9,604 ft100%
CORNELL 5501 14-1 8T2OASIS PETROLEUM NORTH AMERICA LLCActive (A)9,599 ft100%
CORNELL 5501 13-1HOASIS PETROLEUM NORTH AMERICA LLCActive (A)9,536 ft100%
HERB 5501 14-1BOASIS PETROLEUM NORTH AMERICA LLCActive (A)9,509 ft100%
HANNAH KAYDENCE 5501 12-1TOASIS PETROLEUM NORTH AMERICA LLCActive (A)9,493 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 28158Case 25747Extended the spacing unitSTATOIL OIL AND GAS LP
  2. Order 28321Case 25906Pooled all interests in the unitSTATOIL OIL & GAS LP
  3. Order 34491Case 31755Designated the spacing unitDEVON ENERGY WILLISTON, L.L.C.

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

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