BBakken SubsurfaceNorth Dakota well index

Spacing unit · Williams County

1,280-acre Bakken spacing unit

T156N R102W sections 30, 31

Spacing unit8 wells allowed · order 35807Bull Butte-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T156N R102W sections 30, 31
Pool
Bull Butte-Bakken
Zone
Zone II
County
Williams County
Surveyed wells inside
5
Most wells operated by
Devon Energy
Unit id
dsu-90383bb32a925ab15696
Wells allowed by the latest linked order
8
Wells assigned to this unit
4
Pending permits inside
0
Balance under the allowance
+3
First linked order
Dec 31, 2009
Laterals that still fit (Nov 2026 method)
1 (0.95 two-mile equivalents)
Neighbourhood target density
5.39 two-mile laterals per 1,280 acres
Density drilled so far
4.83 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

SAM 30-31 #1-HSAM 30-31 #7TFHSAM 30-31 #3HSAM 30-31 #6TFHSAM 30-31 XE #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
SAM 30-31 #1-HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,069 ft100%
SAM 30-31 #7TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)10,021 ft100%
SAM 30-31 #3HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,015 ft100%
SAM 30-31 #6TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)9,979 ft100%
SAM 30-31 XE #1HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,492 ft95%

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 13947Case 11781Designated the spacing unitBRIGHAM OIL & GAS, L.P.
  2. Order 16140Case 13856Designated the spacing unitBRIGHAM OIL & GAS, L.P.
  3. Order 17002Case 14727Designated the spacing unit, 4 wells allowed
  4. Order 17385Case 15137Established the spacing unit, 4 wells allowedBRIGHAM OIL & GAS, L.P.
  5. Order 18300Case 16037Pooled all interests in the unitBRIGHAM OIL & GAS, L.P.
  6. Order 20647Case 18378Established 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

One other unit shares a surveyed well with this one; overlapping units are not additive.