Spacing unit · Mountrail County

1,280-acre Bakken spacing unit

T156N R90W sections 30, 31

Spacing unit7 wells allowed · order 35556Ross-Bakken

Unit facts

Formation: Bakken
Acres: 1,280
Type: Spacing unit
Land described: T156N R90W sections 30, 31
Pool: Ross-Bakken
Zone: Zone XIV
County: Mountrail County
Surveyed wells inside: 3
Most wells operated by: Slawson
Unit id: dsu-849e90ae5844c4554da2
Wells allowed by the latest linked order: 7
Wells assigned to this unit: 3
Pending permits inside: 0
Balance under the allowance: +4
First linked order: Mar 23, 2007
Laterals that still fit (Nov 2026 method): 3 (2.86 two-mile equivalents)
Neighbourhood target density: 5.76 two-mile laterals per 1,280 acres
Density drilled so far: 2.85 per 1,280 acres

Room to drill: 3 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

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 playback See on the cases and orders mapHistorical spacing units by order

Wells inside the unit

Well	Operator	Status	Lateral inside
ANN NELSON (Federal) 3-31-30H	SLAWSON EXPLORATION COMPANY, INC.	Active (A)	9,754 ft100%
ANN NELSON FEDERAL #1-31-30H	SLAWSON EXPLORATION COMPANY, INC.	Active (A)	9,538 ft100%
ANN NELSON (Federal) 2-31-30H	SLAWSON EXPLORATION COMPANY, INC.	Active (A)	9,252 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

Mar 23, 2007Order 10987Case 9357Established the spacing unitCONTINENTAL RESOURCES, INC.
Feb 29, 2008Order 11621Case 9872Designated the spacing unit
Dec 8, 2010Order 15969Case 13691Designated the spacing unit, 3 wells allowedEOG RESOURCES, INC.
Aug 5, 2011Order 16659Case 14381Designated the spacing unitSAMSON RESOURCES CO.
Feb 2, 2012Order 17855Case 15609Established the spacing unit, 3 wells allowedSLAWSON EXPLORATION CO., INC.
Apr 17, 2012Order 19288Case 17020Pooled all interests in the unitSLAWSON EXPLORATION CO., INC.
May 25, 2012Order 19533Case 17264Pooled all interests in the unitSLAWSON EXPLORATION CO., INC.
Jul 19, 2012Order 19943Case 17673Pooled all interests in the unitEOG RESOURCES, INC.
May 4, 2015Order 23666Case 21362Established the spacing unit, 7 wells allowedSLAWSON EXPLORATION CO., 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.