Predictions of Oil or Gas Potential by Near-Surface Geochemistry

V.T. Jones and R.J. DrozdThe American Association of Petroleum Geologists Bulletin V.67, No. 6 (June 1983), P.932-952

Table 2.  Average Compositions and Ratios of Light Hydrocarbons from Selected Soil-Gas Surveys 

 

Date

C1/∑Cn

(%)

C1/C2

(C3/C1) x 1,000

 

 

 

 

 

Sacramento Basin, dry gas

1972

95

55

6

 

1974

95

49

8

 

1975

94

55

11

 

 

 

 

 

San Joaquin basin, oil and gas

1972

82

8

46

 

1974

84

7

61

 

1975

82

8

56

 

 

 

 

 

Gas-condensate surveys

 

 

 

 

 

 

 

 

 

Southwest Texas

1975

89

12

33

Western Overthrust

1976

90

11

30

Alberta foothills

1978

88

12

30

 

 

 

 

 

Oil surveys

 

 

 

 

 

 

 

 

 

Uvalde, Texas

1975

77

5

77

Permian basin

1976

75

5

64

 

 

 

 

 

Utah Overthrust

 

 

 

 

 

 

 

 

 

Pineview

1976

77

5

83

 

 

 

 

 

Appalachian folded belt

 

 

 

 

 

 

 

 

 

Rosehill

1978

73

4

141

 

 

 

 

 

Uinta basin

 

 

 

 

 

 

 

 

 

Duchesne

1976

68

4

171