BBakken SubsurfaceNorth Dakota well index

Spacing unit · Williams County

1,280-acre Bakken spacing unit

T154N R100W sections 4, 9

Spacing unit8 wells allowed · order 35354Williston-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T154N R100W sections 4, 9
Pool
Williston-Bakken
Zone
Zone IV
County
Williams County
Surveyed wells inside
10
Most wells operated by
Devon Energy
Unit id
dsu-e37f193b61150db25328
Wells allowed by the latest linked order
8
Wells assigned to this unit
9
Pending permits inside
0
Balance under the allowance
-2
First linked order
Nov 21, 2008
Review note
over_allowance
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
7.92 two-mile laterals per 1,280 acres
Density drilled so far
8.79 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

MARK 4-9 2TFHMARK 4-9F #7HMARK 4-9F #8TFHMARK 4-9F #6TFHMARK 4-9F XE #1HMARK 4-9F #4TFHMARK 4-9F #3HMARK 4-9F #5HMARK 4-9 #1HSJOL 5-8F XE #1TFH1 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
MARK 4-9 2TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)10,810 ft100%
MARK 4-9F #7HDEVON ENERGY WILLISTON, L.L.C.Active (A)10,323 ft100%
MARK 4-9F #8TFHDEVON ENERGY WILLISTON, L.L.C.Inactive (IA)10,313 ft100%
MARK 4-9F #6TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)10,240 ft100%
MARK 4-9F XE #1HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,979 ft100%
MARK 4-9F #4TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)9,957 ft100%
MARK 4-9F #3HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,660 ft100%
MARK 4-9F #5HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,517 ft100%
MARK 4-9 #1HDEVON ENERGY WILLISTON, L.L.C.Active (A)9,460 ft100%
SJOL 5-8F XE #1TFHDEVON ENERGY WILLISTON, L.L.C.Active (A)3,006 ft30%

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 12468Case 10541Established the spacing unitBRIGHAM OIL & GAS, L.P.,
  2. Order 15881Case 13605Established the spacing unit, 1 well allowed
  3. Order 15881Case 13605Designated the spacing unit
  4. Order 16300Case 14025Designated the spacing unitCITATION OIL & GAS CORP.
  5. Order 18725Case 16459Pooled all interests in the unitBRIGHAM OIL & GAS, L.P.
  6. Order 19423Case 17155Established 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

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