BBakken SubsurfaceNorth Dakota well index

Spacing unit · Williams County

1,280-acre Bakken spacing unit

T155N R100W sections 18, 19

Spacing unit1 wells allowed · order 34491Cow Creek-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T155N R100W sections 18, 19
Pool
Cow Creek-Bakken
Zone
Zone I
County
Williams County
Surveyed wells inside
7
Most wells operated by
Devon Energy
Unit id
dsu-ac737887ab3d91984cd4
Wells allowed by the latest linked order
1
Wells assigned to this unit
2
Pending permits inside
0
Balance under the allowance
-6
First linked order
May 10, 2010
Review note
over_allowance
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
7.5 two-mile laterals per 1,280 acres
Density drilled so far
7.09 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 5HTUFTO 6-7-18-19F 1HLEOPARD 20-18 4TFH XWA. TUFTO 18-19 1-HTUFTO 6-7-18-19F 2TFH1 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)11,234 ft52%
TUFTO 6-7-18-19F 4TFHDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)10,633 ft50%
TUFTO 6-7-18-19F 5HDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)10,412 ft50%
TUFTO 6-7-18-19F 1HDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)10,408 ft50%
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%
TUFTO 6-7-18-19F 2TFHDEVON ENERGY WILLISTON, L.L.C.Drilling (DRL)9,253 ft47%

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 14558Case 12306Established the spacing unit, 1 well allowedNEWFIELD PRODUCTION CO.
  2. Order 16282Case 14007Established the spacing unit, 4 wells allowedBRIGHAM OIL & GAS, L.P.
  3. Order 16929Case 14651Pooled all interests in the unitBRIGHAM OIL & GAS, L.P.
  4. Order 20139Case 17870Designated the spacing unit, 8 wells allowedZENERGY, INC.
  5. Order 20253Case 17984Established the spacing unit, 8 wells allowedBRIGHAM OIL & GAS, LP
  6. Order 34491Case 31755Established the spacing unit, 1 well allowedDEVON ENERGY WILLISTON, L.L.C.
  7. 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

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