BBakken SubsurfaceNorth Dakota well index

Spacing unit · Mountrail County

1,280-acre Bakken spacing unit

T155N R91W sections 3, 10

Spacing unit4 wells allowed · order 35207Stanley-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T155N R91W sections 3, 10
Pool
Stanley-Bakken
Zone
Zone VIII
County
Mountrail County
Surveyed wells inside
7
Most wells operated by
STEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLC
Unit id
dsu-052fbbb4788491bc1cfb
Wells allowed by the latest linked order
4
Wells assigned to this unit
4
Pending permits inside
0
Balance under the allowance
-1
First linked order
Mar 7, 2011
Laterals that still fit (Nov 2026 method)
4 (3.81 two-mile equivalents)
Neighbourhood target density
7.61 two-mile laterals per 1,280 acres
Density drilled so far
4.18 per 1,280 acres

Room to drill: 4 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

ALLISON ANN 10-3HANTHONY ROBERT 10-3HCRAIG ALLEN 10-3HWADE MORRIS 10-3HGreenbrier 15591-0211-3HSLWASCANA SCHAEFER 3HWASCANA JELLESED 2H1 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
ALLISON ANN 10-3HSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)9,751 ft100%
ANTHONY ROBERT 10-3HSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)9,104 ft100%
CRAIG ALLEN 10-3HSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)8,998 ft100%
WADE MORRIS 10-3HSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)8,139 ft100%
Greenbrier 15591-0211-3HSLSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)8,032 ft78%
WASCANA SCHAEFER 3HSwanson Oil & Gas LLCActive (A)4,331 ft100%
WASCANA JELLESED 2HSwanson Oil & Gas LLCActive (A)3,248 ft58%

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 15383Case 13115Established the spacing unit, 1 well allowedARSENAL ENERGY, INC.
  2. Order 15383Case 13115Designated the spacing unitARSENAL ENERGY, INC.
  3. Order 16226Case 13942Designated the spacing unitFIDELITY EXPLORATION & PRODUCTION CO.
  4. Order 16137Case 13853Established the spacing unit, 2 wells allowedARSENAL ENERGY, INC.
  5. Order 19316Case 17048Pooled all interests in the unitARSENAL ENERGY USA, INC.
  6. Order 18016Case 15761Established the spacing unit, 4 wells allowedARSENAL ENERGY USA INC.

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

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