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Nat Gas > Plays > Flashcards

Plays Flashcards

1
Q

List the major US plays

A 
Permian
Eagle Ford Shale
Marcellus
Utica
DJ Basin/Niobara
Haynesville Shale
Williston Basin and Bakken Shale
Anadarko-Woodford
Granite Wash
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2
Q

List the basins in Texas

A

Permian
Eagle Ford Shale
Haynesville Shale
Granite Wash

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3
Q

In which states (and what parts of them) is the Permian Basin?

A

Western Texas and Eastern New Mexico

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4
Q

What are the sub-basins within the Permian Basin and where are they?

A
  • Delaware (Western)
  • Midland (Eastern)
  • Central
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5
Q 
The Permian Basin is a \_\_\_\_\_\_\_\_ producing area.
A. Oil
B. Gas
C. Oil & Gas
D. None of the above.
A

C

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6
Q

The Permian Basin accounts for approximately _____ percent of natural gas production in the United States.

A

15

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7
Q

What is the largest formation in the Delaware basin?

A

Wolfcamp

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8
Q

Who are the largest Delaware basin operators?

A
  • Occidental
  • EOG
  • Concho
  • Devon
  • ExxonMobil
  • WPX
  • Chevron
  • Cimarex
  • Diamondback
  • Shell
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9
Q

What are the two major formations in the Midland basin?

A
  • Wolfcamp

- Spraberry

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10
Q

Who are the largest Midland basin operators?

A
  • Pioneer
  • Diamondback
  • Concho
  • Endeavor
  • Ovintiv
  • Chevron
  • Parsley
  • SM Energy
  • ExxonMobil
  • Apache
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11
Q

Which Permian basin is considered low-risk, low-reward and why?

A

Central basin because of low well costs and consistent returns

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12
Q

Which Permian basins are unconventional and conventional targets?

A

Central is conventional, and Delaware and Midland are unconventional.

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13
Q

Which areas of each of the Permian basins have high oil-gas ratios and which ones have lower ratios?

A
  • Eastern Delaware basin is oilier (and deeper and overpressured)
  • Western Delaware is much more complex and fractured
  • Eastern Midland is shallower than Delaware and oilier
  • Southern Midland has a higher gas to oil ratio
  • Central basin is primarily oil
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14
Q

In which state(s) (and what parts of them) is the Eagle Ford Shale in?

A

Southern Texas

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15
Q

What type(s) of gas is produced in Eagle Ford?

A

Dry and wet

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16
Q

Why were horizontal drilling and hydraulic fracturing necessary for Eagle Ford?

A

The shale is brittle in areas of high carbonate content - conventional drill bits need to reduce rpm and weight on the bit, with additional complications arising in curve sections

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17
Q

Which are the highest gas production area(s) of Eagle Ford?

A

Southern (Webb, Dimmit, LaSalle)

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18
Q

Why has production in Eagle Ford gone up despite rig count falling?

A

Multi-well pad drilling that allows more wells to be drilled per rig

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19
Q

In which state(s) is the Marcellus Shale primarily in?

A
  • New York
  • Ohio
  • Pennsylvania
  • West Virginia.
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20
Q

What is the largest basin in the Marcellus Shale?

A

Appalachian Basin

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21
Q

What is the largest natural gas field in the USA?

A

Marcellus Shale

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22
Q

Why is the Marcellus Shale a relatively expensive target?

A

Successful wells need to go very deep and, as a result are more expensive to set up.

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23
Q

Which part of the Marcellus Shale is most unproductive and why?

A

Some parts of the easternmost Marcellus Shale are so deep that the heat and pressure destroy natural gas.

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24
Q

Which part of the Marcellus Shale is most productive?

A

Northwestern Pennsylvania

25
Q

What is special about the gas occurrence in the rock in the Marcellus Shale?

A

Many of the historic wells intersect numerous fractures, which, in turn, intersect many more numerous fractures. This allows operators to drain gas from large amounts of surrounding area with a single well.

26
Q 
The Marcellus Shale is a \_\_\_\_\_\_\_\_ producing area.
A. Oil
B. Gas
C. Oil & Gas
D. None of the above.
A

B - because the greater depth resulting from the elevation generates enough heat and pressure to destroy oil

27
Q

In which state(s) is the Utica Shale primarily in?

A

Ohio, Pennsylvania, West Virginia, New York, and Quebec?

28
Q 
The Utica Shale is a \_\_\_\_\_\_\_\_ producing area.
A. Oil
B. Gas
C. Oil & Gas
D. None of the above.
A

C

29
Q

Which part of the Utica Shale is primarily natural gas and why?

A

The parts of the shale in the west are the oilier areas, while the rest of the shale is more gas-oriented.

30
Q

Which is the primary basin in the Utica Shale?

A

Appalachian

31
Q

In which state(s) is the DJ Basin primarily in?

A
  • South Dakota
  • Colorado
  • Nebraska
  • Wyoming
  • Mainly Colorado and Wyoming
32
Q

What two formations are the major targets in the DJ Basin?

A
  • Niobara

- Codell

33
Q 
The DJ Basin is a \_\_\_\_\_\_\_\_ producing area.
A. Oil
B. Gas
C. Oil & Gas
D. None of the above.
A

C

34
Q

Which formation in the DJ Basin is more of a gas play? Why? Is it tight or shale?

A
  • Codell - because it’s deeper than the Niobara formations.

- Tight

35
Q

Which part of the DJ Basin is most responsible for gas production?

A

Western Colorado, largely in Weld County, in the San Juan and Piceance basins.

36
Q

Who are the two largest producers in the DJ Basin?

A
  • Occidental Petroleum

- Chevron

37
Q

Which of these basins typically provides the least ROI?
A. Permian
B. Appalachian
C. DJ

A

C

38
Q

What are two notable issues with drilling in the DJ Basin?

A
  • The Fort Hays Formation separates the Niobara C from the Codell, and because of the faulted nature of the DJ Basin, throws from the Codell Formation can cause unexpected Fort Hays contact, which causes problems for drilling units.
  • Likewise, drilling in Niobara A and encountering a large fault can result in contact with the Sharon Springs Member, which can reduce the stability of the hole.
39
Q

In which state(s) is the Haynesville Shale primarily in?

A
  • Louisiana
  • Texas
  • Arkansas (to a much smaller extent)
40
Q

The Haynesville shale is located beneath which other shale?

A

Bossier Shale

41
Q

Is Haynesville a conventional or unconventional target?

A

Unconventional - it’s a shale.

42
Q

Which three formations make it difficult to reach the Haynesville shale and why?

A
  • Hosston
  • Travis Peak
  • Cotton Valley
  • They are interbedded and can create abrasive barriers that lead to premature failure.
43
Q

Which is the most productive area of the Haynesville Shale?

A

The De Soto county in western Louisiana.

44
Q

Haynesville is a ______ play.
A. Wet Gas
B. Dry Gas

A

B

45
Q

What are the top 5 Haynesville Shale operators?

A
  • Chesapeake Energy
  • Memorial/Range Resources
  • EXCO
  • BHP Billiton
  • Southwestern
46
Q

In which state(s) are the Williston Basin and Bakken Shale primarily in?

A

Montana and North Dakota

47
Q 
The Bakken Shale is a \_\_\_\_\_\_\_\_ producing area.
A. Oil
B. Gas
C. Oil & Gas
D. None of the above.
A

C - primarily oil with associated gas

48
Q

In which state(s) is the Anadarko-Woodford Shale primarily in?

A

Oklahoma (West-Central specifically)

49
Q

What is the main difficulty drillers face in the Anadark-Woodford Shale?

A

The formation has a soft shale base, but also contains significant chert and chert-like silica deposits as well as challenging drillers with pyrite throughout the play, which, combined, can destroy drillbits.

50
Q

Which of these plays has a relatively small number of operators?
A. Anadarko-Woodford
B. Bakken
C. Permian

A

A

51
Q

Which are the largest companies operating in the Anadarko-Woodford play?

A
  • Devon Energy
  • Newfield Exploration
  • Continental
  • Marathon Oil
  • Chesapeke Energy
52
Q

Does the Anadarko play produce:
A. Dry Gas
B. Wet Gas
C. Only Oil

A

A - Anadarko produces dry gas and light, sweet crude oil

53
Q

Explain whether the Anadarko basin is primarily an oil or gas play.

A

The Anadarko basin has multiple layers of oil-bearing formations, but the Ardmore basin Woodford Shale is largely a dry gas play, with unconventional drilling techniques also able to produce oil.

54
Q

What resources are typically sought after in the Anadarko basin other than oil and gas?

A

Helium and iodine.

55
Q

In which state(s) is the Granite Wash primarily in?

A

Panhandle area of:

  • Oklahoma
  • Texas
56
Q

What kind of difficulties to drillers typically face in the Granite Wash?

A

The Granite Wash has a very diverse wash of lithologies, creating a challenging drilling environment, with some areas allowing for low rates of penetration and others allowing for high rates. Throughout the play, the formation usually exhibits an above-average abrasive nature, which demands particularly resilient (and expensive) drill bits.

57
Q 
Granite Wash is a \_\_\_\_\_\_ play. Select two answers.
A. Shale 
B. Tight
C. Conventional
D. Unconventional
A

B and D

58
Q

Is Granite Wash primarily a gas or oil play? Explain.

A

Originally, Granite Wash was largely populated by operators targeting the deep tight-sands for natural gas, but over time, an increasingly large proportion of of rigs in the Granite Wash were targeting the oilier shallow intervals.

59
Q

In which basin is the Granite Wash play most notably in?

A

Anadarko Basin

Nat Gas (3 decks)

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