BBakken SubsurfaceNorth Dakota well index

Spacing unit · Dunn County

1,280-acre Bakken spacing unit

T149N R92W sections 35, 36

Spacing unitHeart Butte-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T149N R92W sections 35, 36
Pool
Heart Butte-Bakken
Zone
Zone XVII
County
Dunn County
Surveyed wells inside
9
Most wells operated by
XTO ENERGY INC
Unit id
dsu-4ea82eadb9643ddf829f
Laterals that still fit (Nov 2026 method)
1 (0.92 two-mile equivalents)
Neighbourhood target density
9.03 two-mile laterals per 1,280 acres
Density drilled so far
8.23 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

FBIR WALKER 34X-25OCOTILLO 149-92-35A-04HFBIR WALKER 31X-36HFBIR WALKER 31X-36GFBIR WALKER 31X-36DWOOLY TORCH 149-92-35A-04HSAGUARO 149-92-35A-04HFBIR WALKER 31X-36HXEDESERT ROSE 149-92-35A-04H TF1 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 WALKER 34X-25XTO ENERGY INCActive (A)10,588 ft96%
OCOTILLO 149-92-35A-04HENERPLUS RESOURCES USA CORPORATIONActive (A)9,979 ft100%
FBIR WALKER 31X-36HXTO ENERGY INCActive (A)9,867 ft100%
FBIR WALKER 31X-36GXTO ENERGY INCActive (A)9,519 ft100%
FBIR WALKER 31X-36DXTO ENERGY INCActive (A)9,460 ft100%
WOOLY TORCH 149-92-35A-04HENERPLUS RESOURCES USA CORPORATIONActive (A)9,367 ft100%
SAGUARO 149-92-35A-04HENERPLUS RESOURCES USA CORPORATIONInactive (IA)9,323 ft100%
FBIR WALKER 31X-36HXEXTO ENERGY INCActive (A)8,384 ft89%
DESERT ROSE 149-92-35A-04H TFENERPLUS RESOURCES USA CORPORATIONActive (A)7,442 ft81%

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 28628Case 26212Established the spacing unitXTO ENERGY INC.
  2. Order 28832Case 26406Pooled all interests in the unitXTO ENERGY INC.
  3. Order 28823Case 26397Designated the spacing unitWPX ENERGY WILLISTON, LLC
  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.