BBakken SubsurfaceNorth Dakota well index

Spacing unit · Dunn County

3,840-acre Bakken spacing unit

T149N R91W sections 21, 22, 27, 28, 33, 34

Spacing unitHeart Butte-Bakken

Unit facts

Formation
Bakken
Acres
3,840
Type
Spacing unit
Land described
T149N R91W sections 21, 22, 27, 28, 33, 34
Pool
Heart Butte-Bakken
Zone
Zone LXII
County
Dunn County
Surveyed wells inside
26
Most wells operated by
XTO ENERGY INC
Unit id
dsu-62ff94ccdbc7a34f8119
Laterals that still fit (Nov 2026 method)
1 (1.45 two-mile equivalents)
Neighbourhood target density
8.58 two-mile laterals per 1,280 acres
Density drilled so far
5.46 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

SARAH YELLOW WOLF 22-27HCFBIR GRINNELL 34X-33AFBIR GRINNELL 34X-33CFBIR GRINNELL 34X-33EFBIR GRINNELL 34X-33DFBIR GRINNELL 34X-33BFBIR GRINNELL 34X-33GFBIR GRINNELL 34X-33FFBIR BLACKMEDICINE 24X-21DFBIR REESE 43X-33DFBIR REESE 43X-33AFBIR BLACKMEDICINE 24X-21CXDFBIR REESE 43X-33GFBIR REESE 43X-33EFBIR BLACKMEDICINE 24X-21AXDFBIR REESE 43X-33FFBIR REESE 43X-33CFBIR REESE 43X-33BFBIR BLACKMEDICINE 24X-21HFBIR BLACKMEDICINE 24X-21EFBIR BLACKMEDICINE 24X-21CFBIR BLACKMEDICINE 24X-21AFBIR BLACKMEDICINE 24X-21FFBIR BLACKMEDICINE 24X-21BFBIR BLACKMEDICINE 24X-21GFBIR BLACKMEDICINE 24X-21EXH1 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
SARAH YELLOW WOLF 22-27HCDEVON ENERGY WILLISTON, L.L.C.Active (A)11,910 ft100%
FBIR GRINNELL 34X-33AXTO ENERGY INCActive (A)10,599 ft100%
FBIR GRINNELL 34X-33CXTO ENERGY INCActive (A)10,437 ft100%
FBIR GRINNELL 34X-33EXTO ENERGY INCActive (A)10,197 ft100%
FBIR GRINNELL 34X-33DXTO ENERGY INCActive (A)10,067 ft100%
FBIR GRINNELL 34X-33BXTO ENERGY INCActive (A)9,789 ft100%
FBIR GRINNELL 34X-33GXTO ENERGY INCActive (A)9,663 ft100%
FBIR GRINNELL 34X-33FXTO ENERGY INCActive (A)9,460 ft100%
FBIR BLACKMEDICINE 24X-21DXTO ENERGY INCActive (A)6,496 ft56%
FBIR REESE 43X-33DXTO ENERGY INCActive (A)5,865 ft100%
FBIR REESE 43X-33AXTO ENERGY INCActive (A)5,730 ft100%
FBIR BLACKMEDICINE 24X-21CXDXTO ENERGY INCActive (A)5,583 ft53%
FBIR REESE 43X-33GXTO ENERGY INCActive (A)5,552 ft100%
FBIR REESE 43X-33EXTO ENERGY INCActive (A)5,482 ft100%
FBIR BLACKMEDICINE 24X-21AXDXTO ENERGY INCActive (A)5,446 ft52%
FBIR REESE 43X-33FXTO ENERGY INCActive (A)5,378 ft100%
FBIR REESE 43X-33CXTO ENERGY INCActive (A)5,312 ft100%
FBIR REESE 43X-33BXTO ENERGY INCActive (A)5,234 ft100%
FBIR BLACKMEDICINE 24X-21HXTO ENERGY INCActive (A)5,174 ft51%
FBIR BLACKMEDICINE 24X-21EXTO ENERGY INCActive (A)5,013 ft50%
FBIR BLACKMEDICINE 24X-21CXTO ENERGY INCActive (A)4,701 ft48%
FBIR BLACKMEDICINE 24X-21AXTO ENERGY INCActive (A)4,697 ft48%
FBIR BLACKMEDICINE 24X-21FXTO ENERGY INCActive (A)4,510 ft48%
FBIR BLACKMEDICINE 24X-21BXTO ENERGY INCActive (A)4,491 ft47%
FBIR BLACKMEDICINE 24X-21GXTO ENERGY INCActive (A)4,361 ft47%
FBIR BLACKMEDICINE 24X-21EXHXTO ENERGY INCActive (A)1,899 ft17%

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 35518Case 32661Designated the spacing unitOASIS PETROLEUM NORTH AMERICA LLC
  2. Order 35852Case 32923Established 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

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