Genetic type and source of natural gas in the southern margin of Junggar Basin, NW China

CHEN Jianping,WANG Xulong,NI Yunyan,XIANG Baoli,LIAO Fengrong,LIAO Jiande,ZHAO Changyi

Table 1 Composition of natural gases from different structures in the southern margin of the Junggar Basin.

Region Anticline name Forma- tion Number of samples Content/% C1/C1+ C1/C2+3 iC4/nC4 C1 C2 C3 iC4 nC4 iC5 nC5 C6+ N2 CO2 C1-5 Eastern Santai J 7 95.25 1.67 0.86 0.19 0.32 0.08 0.11 0.19 1.25 0.08 98.48 0.97 37.66 0.75 Middle Qigu T2-J2 4 97.84 0.46 0.27 0.19 0.14 0.72 0.38 98.90 0.99 134.41 0.40 Nananjihai J1b 2 97.92 0.21 1.82 0.05 98.13 1.00 466.29 Hutubi E1-2z 20 92.89 3.73 0.67 0.18 0.16 0.09 0.07 0.27 1.57 0.37 97.80 0.95 21.12 1.21 Tugulu E1-2 8 90.91 5.21 1.39 0.39 0.34 0.13 0.09 0.37 0.78 0.39 98.46 0.94 13.76 1.19 Manas E1-2z 41 88.05 5.98 1.49 0.38 0.39 0.18 0.13 0.76 2.44 0.20 96.61 0.91 11.79 1.07 Horgos E1-2z 78 86.66 7.96 2.27 0.51 0.63 0.21 0.23 0.48 0.98 0.07 98.47 0.88 8.48 0.83 Anjihai E2-3a 16 68.45 16.27 7.14 1.71 1.99 0.61 0.52 0.81 2.39 0.11 96.69 0.71 2.92 0.85 Western Dushanzi N1 4 80.64 10.56 4.97 1.42 0.74 1.61 0.06 98.33 0.82 5.19 2.09 Xihu J3-E2 2 89.06 5.63 1.12 0.23 0.17 0.06 0.04 0.08 3.51 0.10 96.34 0.93 13.20 0.38 Gaoquan Gaotan-1 K1q 2 75.46 13.36 6.38 1.45 1.32 0.33 0.25 0.11 0.92 0.42 96.31 0.77 3.83 1.12 Kaindick J3-K1q 66 69.72 13.14 7.67 1.74 1.85 0.61 0.50 0.70 3.82 0.25 95.23 0.73 3.35 0.96