BBakken SubsurfaceNorth Dakota well index

Spacing unit · Williams County

2,560-acre Bakken spacing unit

T155N R99W sections 3, 4, 9, 10

Spacing unit2 wells allowed · order 35871East Fork-Bakken

Unit facts

Formation
Bakken
Acres
2,560
Type
Spacing unit
Land described
T155N R99W sections 3, 4, 9, 10
Pool
East Fork-Bakken
Zone
Zone XI
County
Williams County
Surveyed wells inside
18
Most wells operated by
Chord / Enerplus / Oasis / Whiting
Unit id
dsu-2a80bd5753716b2dd405
Wells allowed by the latest linked order
2
Wells assigned to this unit
0
Pending permits inside
0
Balance under the allowance
-15
First linked order
Jan 30, 2018
Laterals that still fit (Nov 2026 method)
0
Neighbourhood target density
8.38 two-mile laterals per 1,280 acres
Density drilled so far
7.83 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

DAM STATE 44-9-6H20711 MILDRED 94 1-HTOMAHAWK 10-3 4TFHP IRGENS 155-99-2-4-9-14HP IRGENS 155-99-3-4-9-13H3P IRGENS 155-99-3-4-9-13HP IRGENS 155-99-2-4-9-15H3AARROWHEAD 10-3 3HP IRGENS 155-99-3-4-9-14HP IRGENS 155-99-2-4-9-15H3TOMAHAWK 10-3 3HARROWHEAD 10-3 1HARROWHEAD 10-3 2TFHP IRGENS 155-99-3-4-9-14H3P IRGENS 155-99-2-4-9-15HTOMAHAWK 10-3 1HTOMAHAWK 10-3 2TFHBOW 1 SWD1 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
DAM STATE 44-9-6HWHITING OIL AND GAS CORPORATIONActive (A)10,351 ft100%
20711 MILDRED 94 1-HWHITING OIL AND GAS CORPORATIONActive (A)10,259 ft96%
TOMAHAWK 10-3 4TFHZavanna Energy Operating, LLCActive (A)10,231 ft100%
P IRGENS 155-99-2-4-9-14HWHITING OIL AND GAS CORPORATIONActive (A)9,872 ft100%
P IRGENS 155-99-3-4-9-13H3WHITING OIL AND GAS CORPORATIONInactive (IA)9,833 ft100%
P IRGENS 155-99-3-4-9-13HWHITING OIL AND GAS CORPORATIONActive (A)9,821 ft100%
P IRGENS 155-99-2-4-9-15H3AWHITING OIL AND GAS CORPORATIONActive (A)9,723 ft100%
ARROWHEAD 10-3 3HZavanna Energy Operating, LLCActive (A)9,693 ft100%
P IRGENS 155-99-3-4-9-14HWHITING OIL AND GAS CORPORATIONActive (A)9,683 ft100%
P IRGENS 155-99-2-4-9-15H3WHITING OIL AND GAS CORPORATIONActive (A)9,628 ft100%
TOMAHAWK 10-3 3HZavanna Energy Operating, LLCActive (A)9,609 ft100%
ARROWHEAD 10-3 1HZavanna Energy Operating, LLCActive (A)9,576 ft100%
ARROWHEAD 10-3 2TFHZavanna Energy Operating, LLCActive (A)9,446 ft100%
P IRGENS 155-99-3-4-9-14H3WHITING OIL AND GAS CORPORATIONActive (A)9,428 ft100%
P IRGENS 155-99-2-4-9-15HWHITING OIL AND GAS CORPORATIONActive (A)9,343 ft100%
TOMAHAWK 10-3 1HZavanna Energy Operating, LLCActive (A)9,320 ft100%
TOMAHAWK 10-3 2TFHZavanna Energy Operating, LLCActive (A)9,300 ft100%
BOW 1 SWDZavanna Energy Operating, LLCTemporarily abandoned (TA)2,858 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 28664Case 26248Established the spacing unit, 2 wells allowedWHITING OIL AND GAS CORP.

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.