BBakken SubsurfaceNorth Dakota well index

Spacing unit · Billings County

1,280-acre Bakken spacing unit

T143N R99W sections 16, 21

Spacing unit6 wells allowed · order 27640Whitetail-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T143N R99W sections 16, 21
Pool
Whitetail-Bakken
Zone
Zone IV
County
Billings County
Surveyed wells inside
2
Most wells operated by
PRIMA EXPLORATION, INC.
Unit id
dsu-9339bcab1ba89258b1da
Wells allowed by the latest linked order
6
Wells assigned to this unit
2
Pending permits inside
0
Balance under the allowance
+4
First linked order
Oct 19, 2006
Laterals that still fit (Nov 2026 method)
2 (1.9 two-mile equivalents)
Neighbourhood target density
4.67 two-mile laterals per 1,280 acres
Density drilled so far
2.76 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. 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

FAIRFIELD STATE 21-16-1HREFAIRFIELD STATE 21-16-2H1 mi

DMR footprint (NAD83) with the published surface locations of its wells. Laterals run under the unit; pads often sit on a neighbouring section.

Wells inside the unit

WellOperatorStatusLateral inside
FAIRFIELD STATE 21-16-1HREPRIMA EXPLORATION, INC.Active (A)19,354 ft100%
FAIRFIELD STATE 21-16-2HTHUNDERBIRD RESOURCES LPPlugged and abandoned (PA)9,722 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 10720Case 9128Designated the spacing unitCONTINENTAL RESOURCES, INC.
  2. Order 13185Case 11124Designated the spacing unitXTO ENERGY INC.
  3. Order 15211Case 12944Established the spacing unit, 6 wells allowedANSCHUTZ EXPLORATION CORP.
  4. Order 16202Case 13918Pooled all interests in the unitANSCHUTZ EXPLORATION CORP.
  5. Order 18022Case 15767Pooled all interests in the unitGMX RESOURCES INC.
  6. Order 22771Case 20465Established the spacing unit, 6 wells allowedCONTINENTAL RESOURCES, 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.