BBakken SubsurfaceNorth Dakota well index

Spacing unit · Dunn County

1,280-acre Bakken spacing unit

T149N R91W section 31

Spacing unit1 wells allowed · order 24338Heart Butte-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T149N R91W section 31
Pool
Heart Butte-Bakken
Zone
Zone XVII
County
Dunn County
Surveyed wells inside
7
Most wells operated by
XTO Energy
Unit id
dsu-df625495ea0231732768
Wells allowed by the latest linked order
1
Wells assigned to this unit
5
Pending permits inside
0
Balance under the allowance
-6
First linked order
Jul 15, 2014
Review note
later_order_likely_missing
Laterals that still fit (Nov 2026 method)
2 (1.84 two-mile equivalents)
Neighbourhood target density
9.05 two-mile laterals per 1,280 acres
Density drilled so far
5.61 per 1,280 acres

Room to drill: 2 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 31X-10CFBIR YELLOWWOLF 31X-10DFBIR YELLOWWOLF 31X-10DXAFBIR YELLOWWOLF 21X-10FFBIR YELLOWWOLF 31X-10GFBIR HUNTSALONG 31X-2FBIR GRINNELL 41X-1C1 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 31X-10CXTO ENERGY INCActive (A)9,956 ft100%
FBIR YELLOWWOLF 31X-10DXTO ENERGY INCActive (A)9,830 ft100%
FBIR YELLOWWOLF 31X-10DXAXTO ENERGY INCActive (A)9,820 ft100%
FBIR YELLOWWOLF 21X-10FXTO ENERGY INCActive (A)9,808 ft100%
FBIR YELLOWWOLF 31X-10GXTO ENERGY INCActive (A)9,787 ft100%
FBIR HUNTSALONG 31X-2XTO ENERGY INCActive (A)5,600 ft100%
FBIR GRINNELL 41X-1CXTO ENERGY INCActive (A)2,390 ft23%

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 28655Case 26239Pooled all interests in the unitXTO ENERGY INC.
  4. Order 35852Case 32923Designated the spacing unitOASIS PETROLEUM NORTH AMERICA 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

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