BBakken SubsurfaceNorth Dakota well index

Spacing unit · Dunn County

320-acre Bakken spacing unit

T149N R91W section 31

Spacing unit4 wells allowed · order 35852Heart Butte-Bakken

Unit facts

Formation
Bakken
Acres
320
Type
Spacing unit
Land described
T149N R91W section 31
Pool
Heart Butte-Bakken
Zone
Zone II
County
Dunn County
Surveyed wells inside
2
Most wells operated by
XTO Energy
Unit id
dsu-a046e2c4722696b450aa
Wells allowed by the latest linked order
4
Wells assigned to this unit
1
Pending permits inside
0
Balance under the allowance
+2
First linked order
Sep 28, 2009
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
9.05 two-mile laterals per 1,280 acres
Density drilled so far
4.06 per 1,280 acres

Room to drill: 0 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. 3 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

FBIR HUNTSALONG 31X-2FBIR YELLOWWOLF 31X-10DXA1 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 HUNTSALONG 31X-2XTO ENERGY INCActive (A)5,600 ft100%
FBIR YELLOWWOLF 31X-10DXAXTO ENERGY INCActive (A)5,013 ft51%

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 16091Case 13807Designated the spacing unit, 2 wells allowedQEP ENERGY CO.
  4. Order 16305Case 14029Established the spacing unit, 2 wells allowedXTO ENERGY INC.
  5. Order 18818Case 16552Pooled all interests in the unitXTO ENERGY INC.
  6. Order 18717Case 16451Designated the spacing unit, 2 wells allowedENERPLUS RESOURCES (U.S.A.) INC.
  7. Order 18222Case 15960Designated the spacing unit, 4 wells allowedDAKOTA-3 E&P CO., LLC
  8. Order 20494Case 18225Designated the spacing unit, 4 wells allowedKODIAK OIL & GAS (USA) INC.
  9. Order 22005Case 19699Established the spacing unit, 4 wells allowedXTO ENERGY INC.
  10. Order 29274Case 26834Designated the spacing unitRIMROCK OIL & GAS WILLISTON 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

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