BBakken SubsurfaceNorth Dakota well index

Spacing unit · Williams County

1,280-acre Bakken spacing unit

T156N R100W sections 4, 9

Spacing unit12 wells allowed · order 35871East Fork-Bakken

Unit facts

Formation
Bakken
Acres
1,280
Type
Spacing unit
Land described
T156N R100W sections 4, 9
Pool
East Fork-Bakken
Zone
Zone V
County
Williams County
Surveyed wells inside
7
Most wells operated by
Chord / Enerplus / Oasis / Whiting
Unit id
dsu-8ff387ae295f396cffdd
Wells allowed by the latest linked order
12
Wells assigned to this unit
5
Pending permits inside
0
Balance under the allowance
+5
First linked order
May 10, 2010
Laterals that still fit (Nov 2026 method)
2 (2.01 two-mile equivalents)
Neighbourhood target density
7.49 two-mile laterals per 1,280 acres
Density drilled so far
5.24 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

IRGENS 41-17-2HIRGENS 41-17-1TFHCAVALLI STATE 156-100-9-4-11TFHCAVALLI STATE 34-9-4HCAVALLI STATE 156-100-9-4-1HIRGENS 41-17-1HUCAVALLI STATE 34-9-5HU1 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
IRGENS 41-17-2HWHITING OIL AND GAS CORPORATIONActive (A)11,287 ft100%
IRGENS 41-17-1TFHWHITING OIL AND GAS CORPORATIONActive (A)10,437 ft100%
CAVALLI STATE 156-100-9-4-11TFHWHITING OIL AND GAS CORPORATIONActive (A)10,414 ft100%
CAVALLI STATE 34-9-4HWHITING OIL AND GAS CORPORATIONActive (A)10,215 ft100%
CAVALLI STATE 156-100-9-4-1HWHITING OIL AND GAS CORPORATIONActive (A)10,042 ft100%
IRGENS 41-17-1HUWHITING OIL AND GAS CORPORATIONActive (A)3,868 ft36%
CAVALLI STATE 34-9-5HUWHITING OIL AND GAS CORPORATIONActive (A)1,801 ft16%

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 14558Case 12306Established the spacing unit, 1 well allowedNEWFIELD PRODUCTION CO.
  2. Order 15377Case 13109Established the spacing unit, 1 well allowed
  3. Order 15377Case 13109Designated the spacing unit
  4. Order 18896Case 16627Designated the spacing unitKODIAK OIL & GAS (USA) INC.
  5. Order 21453Case 19150Pooled all interests in the unitLIBERTY RESOURCES LLC
  6. Order 19908Case 17638Designated the spacing unit, 8 wells allowedCONTINENTAL RESOURCES, INC.
  7. Order 21679Case 19376Established the spacing unit, 8 wells allowedLIBERTY RESOURCES LLC
  8. Order 22586Case 20280Designated the spacing unit, 9 wells allowedPETRO- HUNT, LLC
  9. Order 22844Case 20538Established the spacing unit, 9 wells allowedLIBERTY RESOURCES LLC
  10. Order 24328Case 21995Designated the spacing unit, 9 wells allowed
  11. Order 23697Case 21380Designated the spacing unit, 12 wells allowedCONTINENTAL RESOURCES, INC.
  12. Order 25728Case 23388Established the spacing unit, 12 wells allowedKODIAK OIL & GAS (USA) 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.