BBakken SubsurfaceNorth Dakota well index

Spacing unit · Dunn County

1,280-acre Bakken spacing unit

T149N R92W section 36

Spacing unit2 wells allowed · order 35852Heart Butte-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T149N R92W section 36
Pool
Heart Butte-Bakken
Zone
Zone XXI
County
Dunn County
Surveyed wells inside
9
Most wells operated by
XTO Energy
Unit id
dsu-51682f5efc7dcc604d3d
Wells allowed by the latest linked order
2
Wells assigned to this unit
6
Pending permits inside
0
Balance under the allowance
-7
First linked order
Jul 15, 2014
Review note
over_allowance
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
9.39 two-mile laterals per 1,280 acres
Density drilled so far
8.78 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

FBIR YELLOWWOLF 21X-10FBIR WALKER 34X-25FBIR YELLOWWOLF 21X-10EFBIR WALKER 31X-36HFBIR YELLOWWOLF 21X-10AFBIR WALKER 31X-36DXAFBIR WALKER 31X-36GFBIR WALKER 31X-36DFBIR WALKER 31X-36HXE1 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
FBIR YELLOWWOLF 21X-10XTO ENERGY INCActive (A)11,259 ft100%
FBIR WALKER 34X-25XTO ENERGY INCActive (A)11,001 ft100%
FBIR YELLOWWOLF 21X-10EXTO ENERGY INCActive (A)9,878 ft100%
FBIR WALKER 31X-36HXTO ENERGY INCActive (A)9,867 ft100%
FBIR YELLOWWOLF 21X-10AXTO ENERGY INCActive (A)9,820 ft100%
FBIR WALKER 31X-36DXAXTO ENERGY INCActive (A)9,582 ft100%
FBIR WALKER 31X-36GXTO ENERGY INCActive (A)9,519 ft100%
FBIR WALKER 31X-36DXTO ENERGY INCActive (A)9,460 ft100%
FBIR WALKER 31X-36HXEXTO ENERGY INCActive (A)9,389 ft100%

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 23891Case 21549Designated the spacing unitXTO ENERGY INC.
  2. Order 24338Case 22005Established the spacing unit, 1 well allowedXTO ENERGY INC.
  3. Order 28171Case 25760Designated the spacing unitWPX ENERGY WILLISTON, LLC
  4. Order 28168Case 25757Designated the spacing unit, 2 wells allowedSHD OIL & GAS, LLC
  5. Order 28527Case 26114Established the spacing unit, 2 wells allowedXTO ENERGY INC.
  6. Order 28651Case 26235Pooled all interests in the unitXTO ENERGY 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

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