Time

1/1/1980 1/1/1985 1/1/1990 1/1/1995 

Gas (mcf/day) 10-1

100

101

102

103

104

105

Water (bbl/day)

Oil (bbl/day)

10-3

10-2

10-1

100

101

102

103

Gas 

Water 

Oil 

Island Unit 25

S11 T10S R19E

4304731702

Time

1/1/1980 1/1/1985 1/1/1990 1/1/1995 

Gas (mcf/day) 10-1

100

101

102

103

104

105

Water (bbl/day)

Oil (bbl/day)

10-3

10-2

10-1

100

101

102

103

Gas 

Water 

Oil 

Island Unit 19

S9 T10S R20E

4304731633

Time

1/1/1980 1/1/1985 1/1/1990 1/1/1995 

Gas (mcf/day) 10-1

100

101

102

103

104

105

Water (bbl/day)

Oil (bbl/day)

10-3

10-2

10-1

100

101

102

103

Gas 

Water 

Oil 

Natural Buttes Unit 72N3

S12 T10S R20E

4304731088

1/1/1980 1/1/1985 1/1/1990 1/1/1995 

Gas (mcf/day) 10-1

100

101

102

103

104

105

Water (bbl/day)

Oil (bbl/day)

10-3

10-2

10-1

100

101

102

103

Gas 

Water 

Oil 

CIGE 75D

S8 T10S R21E

4304730954

Time

Time

1/1/1980 1/1/1985 1/1/1990 1/1/1995 

Gas (mcf/day) 10-1

100

101

102

103

104

105

Water (bbl/day)

Oil (bbl/day)

10-3

10-2

10-1

100

101

102

103

Gas 

Water 

Oil 

CIGE 46

S21 T9S R21E

4304730529

Time

1/1/1980 1/1/1985 1/1/1990 1/1/1995 

Gas (mcf/day) 10-1

100

101

102

103

104

105

Water (bbl/day)

Oil (bbl/day)

10-3

10-2

10-1

100

101

102

103

Gas 

Water 

Oil 

CIGE 61

S13 T9S R21E

4304730550

Time

1/1/1980 1/1/1985 1/1/1990 1/1/1995 

Gas (mcf/day) 10-1

100

101

102

103

104

105

Water (bbl/day)

Oil (bbl/day)

10-3

10-2

10-1

100

101

102

103

Gas 

Water 

Oil 

CIGE 63D

S29 T9S R22E

4304730949

1/1/1980 1/1/1985 Time 1/1/1990 1/1/1995 

Gas (mcf/day) 10-1

100

101

102

103

104

105

Water (bbl/day)

Oil (bbl/day)

10-3

10-2

10-1

100

101

102

103

Gas 

Water 

Oil 

Natural Buttes Unit 85J

S4 T10S R22E

4304731246

Time

1/1/1980 1/1/1985 1/1/1990 1/1/1995 

Gas (mcf/day) 10-1

100

101

102

103

104

105

Water (bbl/day)

Oil (bbl/day)

10-3

10-2

10-1

100

101

102

103

Gas 

Water 

Oil 

CIGE 68D

S35 T9S R22E

4304730951

1/1/1980 1/1/1985 Time 1/1/1990 1/1/1995 

Gas (mcf/day) 10-1

100

101

102

103

104

105

Water (bbl/day)

Oil (bbl/day)

10-3

10-2

10-1

100

101

102

103

Gas 

Water 

Oil 

Natural Buttes Unit 38N2

S13 T10S R22E

4304730536

Gas Production Rate (mscf/day)

101 102 103 104 105 106

Oil production rate (bbl/day)

10-1

100

101

102

103

104

10,000 bbl/MMCF

1000 bbl/MMCF

100 bbl/MMCF

10 bbl/MMCF

1 bbl/MMCF0.1 bbl/MMCF

wet gas upper limit

Gas, Oil, and Water Production from the Wasatch Formation, Greater Natural Buttes Field, Uinta Basin, Utah

By Philip H. Nelson and Eric L. Hoffman

2009

Change in Gas Production (mscf/day)

Change in water production (bbl/day)

100

10

1 10

1

1/10

1/100

100

1/100 1/10

Gas Production Rate ( mscf/day )

101 102 103 104 105 106

Water production rate ( bbl/day)

10-1

100

101

102

103

104

10,000 bbl/mmscf

1,000 bbl/mmscf

100 bbl/mmscf

10 bbl/mmscf

1 bbl/mmscf

0.1 bbl/mmscf

Gas Production Rate (mscf/day)

101 102 103 104 105 106

Water production rate (bbl/day)

10-1

100

101

102

103

104

10,000 bbl/mmscf

1,000 bbl/mmscf

100 bbl/mmscf

10 bbl/mmscf

1 bbl/mmscf

0.1 bbl/mmscf

U.S. DEPARTMENT OF THE INTERIOR

U.S. GEOLOGICAL SURVEY

OPEN-FILE REPORT 2009–1049

 Version 1.0

E

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E

E

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E

E

E

E

E

EE

E

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R 20 E R 21 E R 22 E R 23 E R 19 E

T

8

S

T

9

S

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10

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72N3 75D

46

61

63D

85J

68D

38N2

25 19

Figure 1–6

Figure 1–7

Figure 1–8

Figure 1–9

Figure 1–10

Figure 1–11

Figure 1–12

Figure 1–13

Figure 1–14

Figure 1–15

Figure 1–2

Figure 1–3

Figure 1–4

Figure 1–5

Wells examined in this study

Wells with production data shown on this plate 68D

Explanation

>

>

Figure 1–1. Map of wells in the Greater Natural Buttes field

Locations of the 34 wells that were studied are shown in figure 1–1. 

Production plots for 10 of these 34 wells are shown in figures 1–6 

through 1–15. Gas, water, and oil daily production rates are 

computed at times indicated by the two vertical lines in the 

production plots. Gas and water production at the initial time is 

summarized in figure 1–3; gas and oil production at the initial time 

is summarized in figure 1–4. Changes in water and gas production 

over 5-year intervals are shown in figures 4 and 5. [mscf, thousand 

standard cubic feet; mmscf, million standard cubic feet; bbl, barrels] 

109 30’ o

40 00’ o