BBakken SubsurfaceNorth Dakota well index

Spacing unit · Williams County

2,560-acre Bakken spacing unit

T155N R100W sections 6, 7, 18, 19

Spacing unit6 wells allowed · order 34491Cow Creek-Bakken

Unit facts

Formation
Bakken
Acres
2,560
Type
Spacing unit
Land described
T155N R100W sections 6, 7, 18, 19
Pool
Cow Creek-Bakken
Zone
Zone V
County
Williams County
Surveyed wells inside
8
Most wells operated by
Devon Energy
Unit id
dsu-04872f832f248d87cd04
Wells allowed by the latest linked order
6
Wells assigned to this unit
5
Pending permits inside
0
Balance under the allowance
-2
First linked order
Dec 23, 2025
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
7.54 two-mile laterals per 1,280 acres
Density drilled so far
6.56 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

TUFTO 6-7-18-19F 3HTUFTO 6-7-18-19F 4TFHTUFTO 6-7-18-19F 1HTUFTO 6-7-18-19F 5HTUFTO 6-7-18-19F 2TFHLEOPARD 20-18 4TFH XWA. TUFTO 18-19 1-HL. TUFTO 7-6 1-H1 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 3HDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)21,616 ft100%
TUFTO 6-7-18-19F 4TFHDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)21,445 ft100%
TUFTO 6-7-18-19F 1HDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)20,747 ft100%
TUFTO 6-7-18-19F 5HDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)20,637 ft100%
TUFTO 6-7-18-19F 2TFHDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)19,600 ft100%
LEOPARD 20-18 4TFH XWZavanna Energy Operating, LLCActive (A)10,380 ft100%
A. TUFTO 18-19 1-HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,967 ft100%
L. TUFTO 7-6 1-HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,719 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 34491Case 31755Established the spacing unit, 6 wells allowedDEVON ENERGY WILLISTON, L.L.C.
  2. Order 34513Case 31777Pooled all interests in the 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

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