Genetic Types and Source of the Upper Paleozoic Tight Gas in the Hangjinqi Area, Northern Ordos Basin, China
Table 1
Molecular and stable isotopic compositions of natural gas from the Hangjinqi area in the Ordos Basin.
Gas zone
Gas well
Strata
Chemical composition (%)
C1/
δ13C (, VPDB)
δ2H (, VSMOW)
(%)①
(%)②
CH4
C2H6
C3H8
C4H10
C4H10
C5H12
C5H12
N2
CO2
δ13C1
δ13C2
δ13C3
δ2H-C1
δ2H-C2
δ2H-C3
Shiguhao
J11
P1x
93.47
3.62
0.84
0.12
0.18
0.05
0.05
1.36
0.30
0.950
1.43
0.50
J26
P1x
93.66
3.59
0.81
0.11
0.19
0.06
0.05
1.16
0.35
0.951
1.48
0.52
J66P5H
P1x
93.22
4.33
0.94
0.11
0.21
0.05
0.07
0.84
0.21
0.942
1.28
0.45
J66P8H
P1x
84.35
8.32
3.28
0.68
1.12
0.56
0.53
0.25
0.00
0.853
1.32
0.46
J66P9H
P1x
87.04
7.79
2.50
0.45
0.72
0.34
0.30
0.39
0.00
0.878
1.41
0.49
JPH-13
P1x
87.28
7.36
2.52
0.43
0.70
0.34
0.31
0.27
0.00
0.882
/
1.32
0.46
YS1
P1x
90.04
6.49
1.92
0.31
0.50
0.26
0.22
0.24
0.00
0.903
1.32
0.46
J66
P1x
88.27
7.28
2.36
0.41
0.61
0.27
0.22
0.18
0.00
0.888
1.38
0.48
Shilijiahan
J77
P1x
89.47
6.18
2.03
0.33
0.48
0.16
0.1
0.77
0.45
0.906
0.95
0.33
J55
P1s
83.48
7.14
1.86
0.18
0.38
0.08
0.07
6.76
0.03
0.896
/
/
0.74
0.26
J111
P1x
90.88
5.47
1.57
0.29
0.46
0.27
0.23
0.42
0.00
0.916
1.38
0.48
J58P13H
P1x
93.72
3.77
1.05
0.22
0.33
0.17
0.14
0.46
0.00
0.943
/
1.30
0.45
J98
P1x
92.67
4.63
1.18
0.24
0.35
0.21
0.17
0.16
0.00
0.932
1.30
0.45
J58
P1x
90.02
5.31
1.52
0.35
0.53
0.25
0.22
1.10
0.00
0.917
/
1.34
0.47
J99
P1x
90.97
5.69
1.52
0.32
0.48
0.30
0.26
0.35
0.00
0.914
1.30
0.45
Gongkahan
J110
P1x
87.34
6.79
2.71
0.66
0.86
0.41
0.32
0.19
0.00
0.881
1.38
0.48
J101
Pt2
82.75
5.02
2.70
0.46
0.84
0.28
0.28
7.10
0.00
0.896
/
/
0.98
0.34
Note. (%) (①, ②) values were calculated according to the δ13C1- empirical equations for coal-type gas proposed by Dai and Qi [48] and Stahl [49], respectively. “/” indicates no data.
