BBakken SubsurfaceNorth Dakota well index

Spacing unit · Mountrail County

1,280-acre Bakken spacing unit

T155N R91W sections 2, 11

Spacing unit6 wells allowed · order 35207Stanley-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T155N R91W sections 2, 11
Pool
Stanley-Bakken
Zone
Zone X
County
Mountrail County
Surveyed wells inside
9
Most wells operated by
STEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLC
Unit id
dsu-e9714ccd2d1d464115cf
Wells allowed by the latest linked order
6
Wells assigned to this unit
6
Pending permits inside
0
Balance under the allowance
-2
First linked order
Sep 25, 2009
Laterals that still fit (Nov 2026 method)
1 (0.95 two-mile equivalents)
Neighbourhood target density
7.25 two-mile laterals per 1,280 acres
Density drilled so far
6.63 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

GREENBRIER 15591-0211-4HGreenbrier 15591W-0211- 6HGreenbrier 15591W-0211- 5HJOHN PAUL 11-2H-155-91RONALD CARTER 11-2H-155-91AMY ELIZABETH 11-2HGreenbrier 15591W-0211- 7HSLWASCANA JELLESED 2HGreenbrier 15591-0211-3HSL1 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
GREENBRIER 15591-0211-4HSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)10,366 ft100%
Greenbrier 15591W-0211- 6HSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)10,305 ft100%
Greenbrier 15591W-0211- 5HSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)10,304 ft100%
JOHN PAUL 11-2H-155-91STEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)9,764 ft100%
RONALD CARTER 11-2H-155-91STEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)9,764 ft100%
AMY ELIZABETH 11-2HSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)8,827 ft100%
Greenbrier 15591W-0211- 7HSLSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)8,465 ft83%
WASCANA JELLESED 2HSwanson Oil & Gas LLCActive (A)2,335 ft42%
Greenbrier 15591-0211-3HSLSTEPHENS WILLISTON, LLC DBA SEG WILLISTON, LLCActive (A)2,264 ft22%

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 13531Case 11422Established the spacing unit, 2 wells allowedMUREX PETROLEUM CORP.
  2. Order 13531Case 11422Designated the spacing unitMUREX PETROLEUM CORP.
  3. Order 18016Case 15761Established the spacing unit, 4 wells allowedARSENAL ENERGY USA INC.
  4. Order 19964Case 17694Pooled all interests in the unitARSENAL ENERGY USA, INC.
  5. Order 32030Case 29460Designated the spacing unit, 6 wells allowedSEG WILLISTON, LLC
  6. Order 32044Case 29474Established the spacing unit, 6 wells allowedSEG WILLISTON, LLC,

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.