BBakken SubsurfaceNorth Dakota well index

Spacing unit · Dunn County

1,280-acre Bakken spacing unit

T148N R92W sections 10, 15

Spacing unit12 wells allowed · order 35852Heart Butte-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T148N R92W sections 10, 15
Pool
Heart Butte-Bakken
Zone
Zone XXXV
County
Dunn County
Surveyed wells inside
9
Most wells operated by
XTO Energy
DMR case / order on the footprint
11447 /
Unit id
dsu-8ffcdb8dc90e7a9d7c89
Wells allowed by the latest linked order
12
Wells assigned to this unit
9
Pending permits inside
0
Balance under the allowance
+3
First linked order
Sep 28, 2009
Laterals that still fit (Nov 2026 method)
1 (0.95 two-mile equivalents)
Neighbourhood target density
9.38 two-mile laterals per 1,280 acres
Density drilled so far
8.64 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 IRONWOMAN 31X-10DFBIR IRONWOMAN 21X-10AFBIR IRONWOMAN 21X-10BFBIR IRONWOMAN 21X-10EFBIR IRONWOMAN 21X-10AXDFBIR IRONWOMAN 21X-10FFBIR IRONWOMAN 31X-10GFBIR IRONWOMAN 31X-10CFBIR IRONWOMAN 21X-101 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 IRONWOMAN 31X-10DXTO ENERGY INCActive (A)10,204 ft100%
FBIR IRONWOMAN 21X-10AXTO ENERGY INCActive (A)10,193 ft100%
FBIR IRONWOMAN 21X-10BXTO ENERGY INCActive (A)10,155 ft100%
FBIR IRONWOMAN 21X-10EXTO ENERGY INCActive (A)10,146 ft100%
FBIR IRONWOMAN 21X-10AXDXTO ENERGY INCActive (A)10,132 ft100%
FBIR IRONWOMAN 21X-10FXTO ENERGY INCActive (A)10,127 ft100%
FBIR IRONWOMAN 31X-10GXTO ENERGY INCActive (A)10,127 ft100%
FBIR IRONWOMAN 31X-10CXTO ENERGY INCActive (A)10,048 ft100%
FBIR IRONWOMAN 21X-10XTO ENERGY INCActive (A)9,730 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 13568Case 11447Established the spacing unitXTO ENERGY INC.
  2. Order 13817Case 11669Designated the spacing unitQUESTAR EXPL. AND PROD. CO.
  3. Order 14375Case 12125Designated the spacing unitKODIAK OIL & GAS (USA) INC.
  4. Order 14494Case 12243Designated the spacing unit, 2 wells allowedPEAK NORTH DAKOTA, LLC
  5. Order 16640Case 14363Designated the spacing unit, 6 wells allowedENERPLUS RESOURCES (U.S.A.) INC.
  6. Order 17367Case 15119Established the spacing unit, 6 wells allowedXTO ENERGY INC.
  7. Order 17363Case 15112Pooled all interests in the unitXTO ENERGY INC.
  8. Order 17625Case 15379Designated the spacing unit, 4 wells allowedQEP ENERGY CO.
  9. Order 18007Case 15752Designated the spacing unit, 6 wells allowedDAKOTA-3 E&P CO., LLC
  10. Order 18717Case 16451Designated the spacing unit, 6 wells allowedENERPLUS RESOURCES (U.S.A.) INC.
  11. Order 18222Case 15960Designated the spacing unit, 8 wells allowedDAKOTA-3 E&P CO., LLC
  12. Order 20494Case 18225Designated the spacing unit, 8 wells allowedKODIAK OIL & GAS (USA) INC.
  13. Order 21676Case 19373Established the spacing unit, 8 wells allowedXTO ENERGY INC.
  14. Order 26814Case 24448Designated the spacing unit, 8 wells allowedWHITING OIL AND GAS CORP.
  15. Order 26745Case 24378Designated the spacing unit, 12 wells allowedQEP ENERGY CO.
  16. Order 26872Case 24506Designated the spacing unit, 12 wells allowedQEP ENERGY CO.
  17. Order 27023Case 24659Established 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

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