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Evolution of Oil Production in the Bakken Formation. Julie A. LeFever North Dakota Geological Survey. Plays of the Bakken Formation. Conventional Bakken (pre-1987) Cycle 1 – Antelope Structure (1950s – 60s) Cycle 2 – Depositional Edge (1970s – 80s)

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Evolution of Oil Production in the Bakken Formation

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Evolution of oil production in the bakken formation

Evolution of Oil Production

in the Bakken Formation

Julie A. LeFever

North Dakota Geological Survey


Plays of the bakken formation

Plays of theBakken Formation

  • Conventional Bakken (pre-1987)

    • Cycle 1 – Antelope Structure (1950s – 60s)

    • Cycle 2 – Depositional Edge (1970s – 80s)

  • Horizontal Drilling of the Bakken Shale (post-1987)

  • Horizontal Drilling of the Bakken Middle Member

    (2001 to present)


Conventional bakken cycle 1 antelope field

Conventional Bakken Cycle 1 – Antelope Field

  • Discovery Well

    • Stanolind - #1 Woodrow Starr

      • Initial Potential (536 BO; 0.1 BW)

  • Antelope Field

    • 52 wells; 12.5 million BO; 10 BCF Gas

    • “Sanish Sand”

    • Completion Method


Conventional bakken exploration between cycles

Conventional BakkenExploration between Cycles

  • Elkhorn Ranch

    • Shell Oil Co. - #41X-5-1 Government

  • Nesson Anticline

    • #1 B.E. Hove

      • IP - 756 BOPD, 3 BWPD

      • Completion Method


Conventional bakken cycle 2 depositional limit

Conventional Bakken Cycle 2 – Depositional Limit

  • Stratigraphy & Structure

    • Thin Bakken

    • Multiple Pays

    • Folds, Faults or Both

    • Completion Methods


Horizontal drilling of the upper bakken shale

Horizontal Drilling of the Upper Bakken Shale

  • Meridian - #33-11 MOI

    • Drilled vertical

      • Cored, Logged, Drill Stem Tested

    • Drilled Horizontally - 2603 ft

      • 8 ft - upper Bakken Shale

    • IP: 258 BOPD & 299 MCF gas

    • Cost: $2 million


Learning curve

Learning Curve

  • Meridian -#33-11 MOI

    • 57 days to drill

      • 27 days to drill vertical borehole

      • 12 days to drill horizontal section

    • $2 million

  • 3 set of 10 wells

    • 35 days to drill at a cost $1.08 million

  • End of Play

    • $900,000 (same as a vertical well)


Horizontal drilling of the upper bakken shale1

Horizontal Drilling of the Upper Bakken Shale

  • Drilling Methods

  • General Problems

  • Successful well = high volumes of oil


Horizontal drilling of the bakken middle member

Horizontal Drilling of the Bakken Middle Member

  • Richland County, Montana

  • North Dakota


Williston basin

Williston Basin

AB

SK

MB

MT

ND

SD

WY

Richland Co.

McKenzie Co.

ND

Study Area

MT


Richland county mt stratigraphy

Richland County, MTStratigraphy

South

North

Mississippian Lodgepole Formation

Upper Shale Member

Transitional Facies – L7

Upper (Productive)

Mississippian

Bakken Formation

Lithofacies 2

DevonianThree Forks

Lower

Transitional Facies - L1

Lower Shale Member


Balcron oil 44 24 vaira sese sec 24 t 24n r 54e

Balcron Oil - #44-24 VairaSESE Sec. 24, T.24N., R.54E.

GR

DensityPorosity

Lodgepole Fm.

10000

upper

Bakken Fm.

middle

Three Forks Fm.

Neutron Porosity


Sesw sec 13 t 23n r 56e ahel 1 h8 nevins richland county mt

SESW Sec. 13, T.23N.,R.56E.AHEL #1 H8 NevinsRichland County, MT

10604.5 ft.

Bakken/Three ForksContact


Evolution of oil production in the bakken formation

SESW Sec. 13, T.23N.,R.56E.

AHEL #1 H8 Nevins

Richland County, MT

Middle MemberLithofacies 2


Evolution of oil production in the bakken formation

SESW Sec. 13, T.23N.,R.56E.

AHEL #1 H8 Nevins

Richland County, MT

Middle MemberLithofacies 2(producing facies)


Evolution of oil production in the bakken formation

SESW Sec. 13, T.23N.,R.56E.

AHEL #1 H8 Nevins

Richland County, MT

10582 ft

Upper Shale/Middle MbrContact


Blcs structure map

BLCS Structure Map

ft

Contour Interval

Montana

North Dakota


Formation limits

Formation Limits

Bakken Formation

Upper

Middle

Lower

Prairie Salt Edge

Montana

North Dakota


Isopach of the bakken formation

Isopach of the Bakken Formation

ft

140

130

120

110

100

90

Contour Interval

80

70

60

50

40

30

20

10

0

Montana

North Dakota


Isopach of the upper member bakken formation

Isopach of the Upper MemberBakken Formation

ft

Contour Interval

Montana

North Dakota


Isopach of the middle member bakken formation

Isopach of the Middle MemberBakken Formation

ft

Contour Interval

Montana

North Dakota


Middle member porosity zone

Middle MemberPorosity Zone

%

Contour Interval

McKenzie Co.

Richland Co.

Contour Interval: 2 ft.


Bakken middle member prairie salt

Bakken Middle MemberPrairie Salt

Prairie Salt

Edge

ft

Contour Interval

Montana

North Dakota


Bakken middle member prairie salt1

Bakken Middle MemberPrairie Salt

Prairie Salt

ft

Contour Interval

Montana

NorthDakota


Richland county

Richland County

80 Producing Fields1. Red River Fm2. Madison Fm 3. Bakken Fm4. Duperow Fm5. Interlake Fm

20 Fields produce(d) from the Bakken Formation

08/2004


Bakken formation richland county mt

Bakken FormationRichland County, MT

  • Historically –

    • 42 Bakken wells + 8 commingled wells

  • Currently –

    • 127 Bakken Producers

      • Horizontals – 92 producers, 1 PNA, 1 Dry

    • Total production

      • 2000 – 2,618,982 BO

      • 2003 – 5,284,378 BO

      • 2004 – 3,275,061 BO (thru August, 2004)

    • 86 Producing Fields, 23 - Bakken Production

08/2004


Drilling completion bakken horizontals

Drilling & CompletionBakken Horizontals

  • Two laterals to a 1280 spacing unit

  • Well is stimulated with large fracture treatment (~920,000#, gelled water/sand frac)

  • Cost $2.2 million

    • 500-700 BOPD initially

    • Virtually no water


Horizontal drilling of the bakken middle member1

Horizontal Drilling of the Bakken Middle Member

  • Richland County, Montana

  • North Dakota


Lithofacies of the middle member

Lithofacies of the Middle Member

Upper Shale

Lithofacies 5 - Siltstone

Lithofacies 4 – Interbedded Dark Grey Shale and Buff Silty Sandstone

Lithofacies 3 - Sandstone

Productive

Lithofacies 2 – Interbedded Dark Grey Shale

and Buff Silty Sandstone

Productive in MT

Lithofacies 1 - Siltstone

Lower Shale

(From LeFever and others, 1991)


Lithofacies 3

Lithofacies 3


Senw sec 11 t160n r95w conoco inc 17 watterud a

SENW Sec. 11, T160N, R95W Conoco, Inc. - #17 Watterud “A”

GR

Res

Producing Zone

Upper L2 Facies


Joilette oil usa llc 1 17r robert heuer

Joilette Oil (USA), LLC.#1-17R Robert Heuer

  • Sadler Field

  • Re-entry of a Madison Test (02/13/1981)

  • Bakken Completion

    • 03/05/2004

    • IP – 87 BOPD, 150 MCF, 142 BWPD

    • Fracture Stimulated

  • Producing Zone – Lithofacies 3


What do we know

What Do We Know?

  • Rocks Types (Montana=North Dakota)

    • Additional Productive Section

      • Lithofacies 3, “Sanish”, lower Lodgepole Limestone

  • Salt Collapse

  • Completion Methods

  • High Production Rates


  • Conclusions

    Conclusions

    • Horizontal Drilling

      Middle Member = Success


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