BBakken SubsurfaceNorth Dakota well index

Spacing unit · Mountrail County

640-acre Bakken spacing unit

T151N R92W section 29

Spacing unit2 wells allowed · order 34203Big Bend-Bakken

Unit facts

Formation
Bakken
Acres
640
Type
Spacing unit
Land described
T151N R92W section 29
Pool
Big Bend-Bakken
Zone
Zone IV
County
Mountrail County
Surveyed wells inside
10
Most wells operated by
Slawson
Unit id
dsu-b197472a26983865e451
Wells allowed by the latest linked order
2
Wells assigned to this unit
2
Pending permits inside
0
Balance under the allowance
-8
First linked order
Feb 3, 2010
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
9.22 two-mile laterals per 1,280 acres
Density drilled so far
8.98 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. 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

CHALLENGER FEDERAL 5-29-32TFHChallenger Federal 8-29-32HSILENCER 1-29HCHALLENGER FEDERAL 7-29-32TFHCHALLENGER FEDERAL 3-29-32HCHALLENGER FEDERAL 9-29-32HCHALLENGER FEDERAL 6-29-32TFHSILENCER 2-29HMOLINE 14-32HCHALLENGER FEDERAL 4-29-32TFH1 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
CHALLENGER FEDERAL 5-29-32TFHSLAWSON EXPLORATION COMPANY, INC.Active (A)5,255 ft52%
Challenger Federal 8-29-32HSLAWSON EXPLORATION COMPANY, INC.Active (A)5,120 ft50%
SILENCER 1-29HSLAWSON EXPLORATION COMPANY, INC.Active (A)5,017 ft100%
CHALLENGER FEDERAL 7-29-32TFHSLAWSON EXPLORATION COMPANY, INC.Active (A)4,767 ft49%
CHALLENGER FEDERAL 3-29-32HSLAWSON EXPLORATION COMPANY, INC.Active (A)4,762 ft48%
CHALLENGER FEDERAL 9-29-32HSLAWSON EXPLORATION COMPANY, INC.Active (A)4,719 ft48%
CHALLENGER FEDERAL 6-29-32TFHSLAWSON EXPLORATION COMPANY, INC.Active (A)4,588 ft48%
SILENCER 2-29HSLAWSON EXPLORATION COMPANY, INC.Active (A)4,490 ft100%
MOLINE 14-32HMARATHON OIL COMPANYActive (A)4,451 ft46%
CHALLENGER FEDERAL 4-29-32TFHSLAWSON EXPLORATION COMPANY, INC.Active (A)4,390 ft46%

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 14136Case 11948Listed the unit in a pool zone table, 2 wells allowedZENERGY OPERATING CO., LLC
  2. Order 15103Case 12840Pooled all interests in the unitSLAWSON EXPLORATION CO., INC.
  3. Order 17307Case 15057Established the spacing unit, 1 well allowedSLAWSON EXPLORATION CO., INC.
  4. Order 18907Case 16638Listed the unit in a pool zone table, 2 wells allowedMARATHON OIL CO.
  5. Order 19820Case 17550Established the spacing unit, 2 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.

Overlapping units

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