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Plays Flashcards

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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?

Study These Flashcards
A

Northwestern Pennsylvania

25
What is special about the gas occurrence in the rock in the Marcellus Shale?
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
``` The Marcellus Shale is a ________ producing area. A. Oil B. Gas C. Oil & Gas D. None of the above. ```
B - because the greater depth resulting from the elevation generates enough heat and pressure to destroy oil
27
In which state(s) is the Utica Shale primarily in?
Ohio, Pennsylvania, West Virginia, New York, and Quebec?
28
``` The Utica Shale is a ________ producing area. A. Oil B. Gas C. Oil & Gas D. None of the above. ```
C
29
Which part of the Utica Shale is primarily natural gas and why?
The parts of the shale in the west are the oilier areas, while the rest of the shale is more gas-oriented.
30
Which is the primary basin in the Utica Shale?
Appalachian
31
In which state(s) is the DJ Basin primarily in?
- South Dakota - Colorado - Nebraska - Wyoming - Mainly Colorado and Wyoming
32
What two formations are the major targets in the DJ Basin?
- Niobara | - Codell
33
``` The DJ Basin is a ________ producing area. A. Oil B. Gas C. Oil & Gas D. None of the above. ```
C
34
Which formation in the DJ Basin is more of a gas play? Why? Is it tight or shale?
- Codell - because it's deeper than the Niobara formations. | - Tight
35
Which part of the DJ Basin is most responsible for gas production?
Western Colorado, largely in Weld County, in the San Juan and Piceance basins.
36
Who are the two largest producers in the DJ Basin?
- Occidental Petroleum | - Chevron
37
Which of these basins typically provides the least ROI? A. Permian B. Appalachian C. DJ
C
38
What are two notable issues with drilling in the DJ Basin?
- 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
In which state(s) is the Haynesville Shale primarily in?
- Louisiana - Texas - Arkansas (to a much smaller extent)
40
The Haynesville shale is located beneath which other shale?
Bossier Shale
41
Is Haynesville a conventional or unconventional target?
Unconventional - it's a shale.
42
Which three formations make it difficult to reach the Haynesville shale and why?
- Hosston - Travis Peak - Cotton Valley - They are interbedded and can create abrasive barriers that lead to premature failure.
43
Which is the most productive area of the Haynesville Shale?
The De Soto county in western Louisiana.
44
Haynesville is a ______ play. A. Wet Gas B. Dry Gas
B
45
What are the top 5 Haynesville Shale operators?
- Chesapeake Energy - Memorial/Range Resources - EXCO - BHP Billiton - Southwestern
46
In which state(s) are the Williston Basin and Bakken Shale primarily in?
Montana and North Dakota
47
``` The Bakken Shale is a ________ producing area. A. Oil B. Gas C. Oil & Gas D. None of the above. ```
C - primarily oil with associated gas
48
In which state(s) is the Anadarko-Woodford Shale primarily in?
Oklahoma (West-Central specifically)
49
What is the main difficulty drillers face in the Anadark-Woodford Shale?
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
Which of these plays has a relatively small number of operators? A. Anadarko-Woodford B. Bakken C. Permian
A
51
Which are the largest companies operating in the Anadarko-Woodford play?
- Devon Energy - Newfield Exploration - Continental - Marathon Oil - Chesapeke Energy
52
Does the Anadarko play produce: A. Dry Gas B. Wet Gas C. Only Oil
A - Anadarko produces dry gas and light, sweet crude oil
53
Explain whether the Anadarko basin is primarily an oil or gas play.
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
What resources are typically sought after in the Anadarko basin other than oil and gas?
Helium and iodine.
55
In which state(s) is the Granite Wash primarily in?
Panhandle area of: - Oklahoma - Texas
56
What kind of difficulties to drillers typically face in the Granite Wash?
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
``` Granite Wash is a ______ play. Select two answers. A. Shale B. Tight C. Conventional D. Unconventional ```
B and D
58
Is Granite Wash primarily a gas or oil play? Explain.
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
In which basin is the Granite Wash play most notably in?
Anadarko Basin

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