BBakken SubsurfaceNorth Dakota well index

Spacing unit · Williams County

1,280-acre Bakken spacing unit

T155N R95W sections 23, 26

Spacing unit12 wells allowed · order 32884Capa-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T155N R95W sections 23, 26
Pool
Capa-Bakken
Zone
Zone VIII
County
Williams County
Surveyed wells inside
7
Most wells operated by
XTO Energy
Unit id
dsu-4ecefa2f5f50575ad2e0
Wells allowed by the latest linked order
12
Wells assigned to this unit
7
Pending permits inside
0
Balance under the allowance
+5
First linked order
Aug 28, 2007
Laterals that still fit (Nov 2026 method)
2 (1.9 two-mile equivalents)
Neighbourhood target density
9.75 two-mile laterals per 1,280 acres
Density drilled so far
6.69 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. 1 more would fit the density but not the spacing rule. 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

MARILYN 21X-23AMARILYN 21X-23DMARILYN 21X-23GMARILYN 21X-23CMARILYN 21X-23HMARILYN 21X-23TUBIE 21X-231 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
MARILYN 21X-23AXTO ENERGY INCActive (A)10,305 ft100%
MARILYN 21X-23DXTO ENERGY INCActive (A)10,230 ft100%
MARILYN 21X-23GXTO ENERGY INCActive (A)10,229 ft100%
MARILYN 21X-23CXTO ENERGY INCActive (A)10,206 ft100%
MARILYN 21X-23HXTO ENERGY INCActive (A)10,174 ft100%
MARILYN 21X-23XTO ENERGY INCActive (A)9,750 ft100%
TUBIE 21X-23XTO ENERGY INCActive (A)9,480 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 11272Case 9593Established the spacing unit
  2. Order 11557Case 9823Designated the spacing unitHEADINGTON OIL, LP
  3. Order 13186Case 11125Pooled all interests in the unitXTO ENERGY INC.
  4. Order 13377Case 11281Designated the spacing unitXTO ENERGY INC.
  5. Order 13566Case 11445Established the spacing unitXTO ENERGY INC.
  6. Order 14594Case 12342Established the spacing unit, 3 wells allowedXTO ENERGY INC.
  7. Order 17546Case 15301Pooled all interests in the unitXTO ENERGY INC.
  8. Order 20614Case 18345Established the spacing unit, 8 wells allowedXTO ENERGY INC.
  9. Order 26286Case 23943Established the spacing unit, 12 wells allowedXTO 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

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