Data, Stats, News & Info

Bakken/Williston Basin Data, History & Stats

This guide provides information about the Bakken Williston Basin, oil and gas data, history, top operators and other facts.

Oil pumpjack operating in a rural field within the Permian Basin, surrounded by green farmland and distant trees in the background.
Overview

Bakken/Williston Basin Oil and Gas

Located in eastern Montana, western North Dakota, South Dakota, and southern Saskatchewan, the Bakken or Williston Basin is a sizable intracratonic sedimentary basin that is well-known for its abundant resources of potash and petroleum. The Missouri River cuts through the basin, which is a geologic structural basin rather than a geographical depression. The oval-shaped depression stretches for around 475 miles from north to south and 300 miles from east to west.

About 3.8 billion barrels of oil and 470 billion cubic feet of natural gas have been produced cumulatively from the basin.

What is the Bakken Basin?

The Bakken or Williston Basin is a significant petroleum producer. Natural gas and oil are extracted from the basin’s uppermost sand layers and deep limestone strata. The majority of oil-bearing zones were deposited during basin formation in the Paleozoic, but later structural traps were created by the rock folding and faulting during the development of the Rocky Mountains.

The basin is characterized by thick sequences of sediments that underlie an area of about 110,000 square miles.

Map showing the Bakken Williston Basin shaded in gray, spanning parts of Montana, North Dakota, South Dakota, and extending into Canada and Wyoming.

Horizontal Rig Count

horizontal rig count bakken basin from 2020 to 2025

The Bakken Basin: History, Data and Facts

The Williston Basin is found above an ancient Precambrian geologic basement feature, the Trans-Hudson Orogenic Belt, which was formed between 1.8 and 1.9 billion years ago. Between 472 million and 462 million years ago, the land began to gently sag downward. This process is thought to have started during the Middle Ordovician Epoch. Over the course of the following 400 million years, the basin was periodically covered by rising seas, which caused a slow deposit of marine sediments.

The Bakken Oil Production

When and how did it start?

In 1946, Amerada Corporation started exploring the basin. They began drilling at a promising lease 30 miles northeast of Williston, North Dakota. After four years of testing and mapping, on April 4, 1951, the Amerada Hess Corporation Clarence Iverson #1 well struck oil on the Nesson Anticline. Large fields were not discovered in North Dakota until the 1950s, when the basin started to develop into a significant oil-producing area.

In Billings County’s Red River Formation, oil was found in 1968. The highly successful output was driven by the Red River discovery as well as the Bell Creek Field discovery. The Red Wing Creek Field, a complicated geological structure with a pay section that was 1,000 feet thick was found in 1972. A year later, because the Arab Oil Embargo was implemented, exploration increased, and the Billings Anticline complex, Mondak field, and the Knife field were discovered. Finally, production began in the Bakken with the discovery of the Dickinson Lodgepole Field along with the discovery of the Red River “B” Pool in Bowman County. Production reached its high in 1986, although in the early 2000s, there was a noticeable increase in production thanks to the introduction of horizontal drilling methods, particularly in the Bakken Formation. Despite a decrease in rig counts during Covid, production has been increasing in recent years.

A large oil drilling rig stands on barren ground under a cloudy sky in the Bakken Williston Basin, with some equipment and structures visible nearby.

Unconventional Oil Production Over The Last 5 Years

Stacked area chart showing the number of users over time for five different groups in the Bakken Williston Basin, with user counts rising and falling for each group at various intervals.
Top counties oil production in the Bakken 2020 to 2025
Horizontal Well Daily Oil Production [bo/d] of the Top 15 Counties
Ranking
County
State
Horizontal Well Count
November 2025 – Daily Production (Bo/d)
1
McKenzie
North Dakota
1,173
236,366
2
Williams (ND)
North Dakota
961
198,183
3
Dunn (ND)
North Dakota
1,000
169,037
4
Mountrail
North Dakota
823
151,231
5
Divide
North Dakota
118
30,068
6
Richland (MT)
Montana
105
24,422
7
Roosevelt (MT)
Montana
47
16,607
8
Burke (ND)
North Dakota
41
13,149
9
Billings
North Dakota
36
4,826
10
McLean (ND)
North Dakota
4
1,022
11
Bottineau
North Dakota
17
560
12
Fallon
Montana
5
351
13
Stark (ND)
North Dakota
4
146
14
Bowman
North Dakota
2
125
15
Renville (ND)
North Dakota
1
19

Top 20 Oil Operators [2020 - 2025]

Top operators oil production in the Bakken 2020 to 2025
Horizontal Well Daily Oil Production [bo/d] of the Top 20 operators
Ranking
Operator
November 2025 – Daily Production (Bo/d)
1
Continental Resources
143,571
2
Chord Energy
136,256
3
ConocoPhillips
116,515
4
Chevron
89,887
5
Devon Energy
79,294
6
Kraken Oil & Gas
73,915
7
Phoenix Operating
36,209
8
Hunt Oil
31,075
9
Petro-Hunt
23,835
10
EOG
21,487
11
Exxon Mobil
20,072
12
Slawson
19,012
13
Silver Hill Energy
13,147
14
Koda Resources
11,581
15
Zavanna Energy Operating
6,403
16
Sinclair Oil & Gas
4,120
17
Murex Petroleum
3,381
18
Lime Rock Resources III
2,423
19
Vitesse
2,359
20
Prima Exploration
1,845

Forecast Oil Production of The Top 20 Operators

Forecast Oil Production of The Top 20 Operators in the Bakken
Cumulative oil production [bo/d] forecast over time for the top 20 Williston operators

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The Bakken Gas Production

Industrial facility with large metal pipes and valves, likely part of a Bakken Williston Basin oil or gas refinery, under a blue sky with scattered clouds.

When and how did it start?

In 1913, shallow gas was discovered in an Upper Cretaceous sandstone on the Cedar Creek Anticline. This discovery marked the beginning of gas production in the region. Although oil was later discovered on the same anticline in 1936, it was the gas discovery that set the stage for future exploration and development in the area.

Throughout the subsequent decades, the focus remained on both oil and gas production, with significant advancements in technology and exploration methods. The combination of these efforts contributed to the overall development of the Bakken Formation as a major source of both oil and gas.

Gas Production Over The Last 5 Years

Gas Production Over The Last 5 Years - the bakken
Horizontal Well Daily Gas Production [Mcf/d]
Top counties gas production in the Bakken 2020 to 2025
Horizontal Well Daily Gas Production [Mcf/d] of the Top 15 Counties
Ranking
County
State
Horizontal Well Count
November 2025 – Daily Production (Mcf/d)
1
McKenzie
North Dakota
1,173
766,402
2
Williams (ND)
North Dakota
961
500,035
3
Dunn (ND)
North Dakota
1,000
294,903
4
Mountrail
North Dakota
823
264,684
5
Divide
North Dakota
118
42,482
6
Richland (MT)
Montana
105
34,399
7
Roosevelt (MT)
Montana
47
21,397
8
Burke (ND)
North Dakota
41
13,904
9
Billings
North Dakota
36
5,381
10
McLean (ND)
North Dakota
4
919
11
Stark (ND)
North Dakota
4
89
12
Bottineau
North Dakota
17
46
13
Bowman
North Dakota
2
30
14
Fallon
Montana
5
9
15
Renville (ND)
North Dakota
1
0

Top 20 Natural Gas Operators [2020 - 2025]

Top operators gas production in the Bakken 2020 to 2025
Horizontal Well Daily Gas Production [Mcf/d] of the Top 20 Operators
Ranking
Operator
November 2025 – Daily Production (MCf/d)
1
Continental Resources
416,390
2
ConocoPhillips
305,538
3
Chevron
271,975
4
Chord Energy
260,328
5
Devon Energy
214,360
6
Kraken Oil & Gas
125,050
7
Exxon Mobil
73,420
8
Petro-Hunt
48,045
9
Phoenix Operating
33,746
10
Slawson
32,510
11
EOG
26,869
12
Silver Hill Energy
23,163
13
Zavanna Energy Operating
16,319
14
Vitesse
15,971
15
Koda Resources
14,739
16
Hunt Oil
14,184
17
Sinclair Oil & Gas
14,049
18
Murex Petroleum
11,807
19
Lime Rock Resources III
3,568
20
Prima Exploration
2,004

Forecast Gas Production of The Top 20 Operators

Forecast Gas Production of The Top 20 Operators in the Bakken
Cumulative gas production [Mcf/d] forecast over time for the top 20 Williston operators

Natural resources obtained in The Bakken Basin

Potash

Canada is the largest producer of potash in the world thanks to the Williston Basin. The Middle Devonian Prairie Formation is where the sediments are found. Companies that produce a lot of potash include Nutrien and Mosaic.

Coal

Large coal deposits are found in the Williston Basin, particularly in the Fort Union Formation, which is primarily Paleogene in age. They were discovered during the Lewis and Clark Expedition. In the vicinity of Sims, North Dakota, coal mining started in 1873 but was quickly stopped. As the Northern Pacific Coal Company, the Northern Pacific Railway took over the mine and developed the lignite beds. The area around Minot and Dickinson, North Dakota, saw the opening of additional mines, and the lignite industry expanded significantly between 1900 and 1920. Since then, it has experienced booms and busts.

Helium

Significant Helium concentrations were found in southwest Saskatchewan in 1952. Four wells were used for production between 1963 and 1977, and again in 2014. The maximum concentration was found in the Deadwood Formation and other Lower Paleozoic formations. In Precambrian granitic basement rocks, uranium and thorium underwent natural radioactive decay to produce helium, which later migrated into overlying Lower Paleozoic shales.

The Bakken Basin Formations

The Bakken Basin is home to several major geological formations, each with its own unique characteristics and significance. Here are some of the notable formations found in the Bakken Basin.
Diagram showing five horizontal geological layers—Lodgepole, Upper Bakken Shale, Middle Bakken, Lower Bakken Shale, and Three Forks—within the Bakken Williston Basin, with the Bakken formation highlighted.
Lodgepole
Lodgepole
This formation is located at the top of the Mississippian sequence, is primarily composed of limestone with interbedded shales and its is noted for its tight, low-permeability characteristics.
Lodgepole
Upper Bakken Shale
Upper Bakken Shale
The Upper Bakken Shale is a rich, organic shale layer. It is one of the primary source rocks for oil in the Bakken Basin, generating hydrocarbons that migrate into surrounding reservoirs. The shale is characterized by high total organic carbon (TOC) content, making it a prolific source rock.
Upper Bakken Shale
Middle Bakken
Middle Bakken
The Middle Bakken is a mixed siliciclastic and carbonate unit, sandwiched between the Upper and Lower Bakken Shales. This formation is the primary reservoir for oil in the Bakken Basin, characterized by its relatively higher porosity and permeability compared to the shales above and below.
Middle Bakken
Lower Bakken Shale
Lower Bakken Shale
The Lower Bakken Shale is similar to the Upper Bakken Shale, consisting of organic-rich, black shale. It acts both as a source rock and a seal for hydrocarbons.
Lower Bakken Shale
Three Forks
Three Forks
This formation is composed primarily of dolostone with interbedded siltstone and shale layers. It is another significant oil reservoir within the Bakken Basin.
Three Forks
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