Oil and gas source and accumulation of Zhongqiu 1 trap in Qiulitage structural belt, Tarim Basin, NW China

LI Jian,LI Jin,XIE Zengye,WANG Chao,ZHANG Haizu,LIU Mancang,LI Dejiang,MA Wei,MAO Danfeng,ZENG Xu

Table 1 Geochemical information of natural gases from Qiulitage structural belt and its adjacent areas.

Gas field/ Section Well Depth/m Formation Contents of gas components/% Drying coefficient δ13C/‰ Calculated Ro/% Reference N2 CO2 CH4 C2H6 C3H8 iC4H10 nC4H10 iC5 nC5 C6+ CH4 C2H6 C3H8 nC4H10 West of Dongqiu section Dongqiu5 4 317.00-4 334.00 E 3.61 0.29 91.41 3.76 0.78 0.06 0.06 0.02 0.02 0 0.95 Dongqiu3 1 206.00-1 216.00 N1j 1.82 0.12 90.20 5.98 1.07 0.21 0.19 0.10 0.07 0 0.92 Zhongqiu section Zhongqiu1 6 072.00-6 286.00 K1bs 0.85 0.86 92.30 4.58 0.93 0.18 0.19 0.06 0.05 0 0.94 -32.6 -22.5 -20.7 -20.6 1.3 Xiqiu section Quele1 5 759.10-5 769.89 E 2.17 0.13 81.55 10.6 3.56 0.64 0.80 0.21 0.15 0.21 0.83 Dina gas field Dina1-2 5 486.00-5 653.50 0.70 0.41 89.51 7.24 1.40 0.26 0.25 0.09 0.06 0.08 0.91 -34.0 -22.6 -19.9 1.1 Dina2 4 597.44-4 875.59 N1j 1.73 0.33 88.68 7.19 1.28 0.24 0.25 0.09 0.06 0.15 0.91 -33.7 -21.8 -19.4 -18.8 1.1 Dina202 5 192.43-5 280.00 E+K 2.56 0.10 89.32 6.69 1.01 0.15 0.11 0.02 0.01 0.03 0.92 -34.4 -22.6 -20.1 1.0 [13] Dina204 E 0.62 0.36 88.73 6.76 2.13 0.46 0.44 0.15 0.12 0.24 0.90 -34.0 -22.1 -19.7 -19.5 1.1 [12] Dina2-24 4 792.00-5 105.50 E 0.99 0.23 88.55 7.39 1.54 0.30 0.31 0.12 0.09 0.47 0.90 -34.5 -21.3 -20.9 -20.3 1.0 Dibei gas field Dibei102 J1a 3.35 1.06 84.68 6.20 2.15 0.50 0.57 0.26 0.25 0.93 0.89 -33.8 -25.8 -24.9 -23.0 1.1 Dibei104 J1a 0.31 3.03 90.30 4.46 0.98 0.21 0.19 0.07 0.05 0.39 0.93 -32.4 -24.3 -22.8 -21.8 1.4 Dixi1 4 898.00-4 975.00 J1a 0.60 1.99 90.60 4.61 1.18 0.26 0.27 0.12 0.08 0.29 0.93 -32.7 -23.9 -23.6 1.3 Yinan2 4 776.00-4 785.00 J1a 2.70 2.60 88.16 4.91 1.16 0.24 0.23 0 0 0 0.93 -32.2 -24.6 -23.1 -22.8 1.4 Yaha gas field Yaha1 5 451.00-5 466.00 E 3.75 0.12 84.53 7.58 0.89 0.36 0.51 0.18 0.26 0.60 0.89 -33.4 -21.9 -17.5 -23.2 1.2 Yaha1-6 5 152.00-5 172.00 E 3.85 0.16 84.38 7.12 2.72 0.56 0.59 0.62 0 0 0.88 -33.2 -23.2 -20.7 -21.4 1.2 Yaha2 4 953.50-4 984.00 N 3.95 0.54 82.60 7.76 3.09 0.66 0.70 0.70 0 0 0.86 -32.2 -22.6 -19.7 -20.9 1.4 Yaha 23-1-13 4 975.50-4 985.00 N 3.62 0.31 81.65 8.04 3.47 0.81 0.89 1.22 0 0 0.85 -32.8 -23.9 -21.2 -21.3 1.3 Yaha 23-1-6 5 152.00-5 172.00 E 3.73 0.54 81.5 8.59 3.17 0.70 0.86 0.90 0 0 0.85 -32.6 -23.2 -20.8 -21.4 1.3 Yaha 23-2-14 5 132.00-5 157.00 E 3.74 0.54 83.09 7.66 3.03 0.64 0.67 0.63 0 0 0.87 -32.5 -23.1 -20.6 -20.6 1.4 Kela 2 gas field Kela2 3 499.87-3 534.66 E 0.50 0.70 98.20 0.52 0.04 0.01 0.01 0 0.01 0.03 0.99 -27.3 -19.4 3.2 [13] Kela201 4 016.00-4 021.00 K1bs 1.21 1.00 96.88 0.91 0 0 0 0 0 0 0.99 -27.3 -19.0 -19.5 -20.9 3.2 [13] Kela201 3 630.00-3 640.00 E 1.74 0.47 97.40 0.39 0 0 0 0 0 0 1.00 -27.1 -18.5 -19.1 -20.3 3.3 [13] Kela203 E 0.58 0.66 97.86 0.82 0.05 0.01 0.01 0.01 0 0 0.99 -27.3 -18.5 -19 -20.8 3.2 [12] Kela2-10 E 0.70 0.56 98.13 0.51 0.04 0.01 0.01 0 0 0 0.99 -28 -19.1 -20.2 -21.0 2.8 [12] Kela2-14 E 0.75 0.65 98.03 0.49 0.04 0.01 0.01 0 0 0 0.99 -28 -18.7 -19.9 -21.2 2.8 [12] Kela2-4 E 0.69 0.61 98.09 0.51 0.04 0.01 0.01 0 0 0 0.99 -26.8 -18.4 -19.9 -21.2 3.4 [12] Kela2-7 E 0.77 0.65 97.96 0.51 0.04 0.01 0.01 0 0 0 0.99 -27.9 -18.8 -20.0 -21.1 2.9 [12] Kela2-H1 3 801.50-3 858.00 K 0.71 0.10 98.57 0.51 0.04 0.01 0.01 0 0 0.03 0.99 -27.8 -18.8 -20.9 2.9 Kela3 3 544.00-3 550.00 E 1.62 3.30 94.36 0.73 0 0 0 0 0 0 0.99 -30.8 -17.7 -17.1 1.8 Keshen gas field Keshen 105 7 342.00-7 377.00 K1bs 1.14 2.36 95.94 0.47 0.03 0 0.01 0 0 0.01 0.99 -25.7 -13.8 4.1 Keshen 132-2 7 428.50-7 622.00 K1bs 2.6 1.48 93.70 1.86 0.23 0.05 0.05 0.02 0.01 0 0.98 -30.0 -18.8 -18.7 2.0 Keshen2 6 573.00-6 631.00 K1bs 1.21 0.81 97.40 0.54 0.04 0.01 0.01 0 0 0 0.99 -28.3 -17.7 -15.7 2.7 Keshen 201 6 505.00-6 700.00 K1bs 0.70 0.78 97.84 0.54 0.04 0.01 0.01 0 0 0.06 0.99 -27.6 -17.3 -19.8 3.0 Keshen 203 6 600.00-6 685.00 K1bs 0.72 0.30 98.31 0.55 0.04 0.01 0.01 0 0 0.04 0.99 -27.7 -16.3 -19.9 3.0 Keshen 206 6 525.00-6 800.00 K1bs 0.86 0.61 97.89 0.54 0.04 0 0.01 0 0 0.03 0.99 -27.8 -16.1 -19.4 2.9 Keshen 504 6 453.00-6 621.00 K1bs 0.11 0.58 99.02 0.27 0.01 0 0 0 0 0.01 1.00 -24.2 -15.8 5.3 Gas field/ Section Well Depth/m Formation Contents of gas components/% Drying coefficient δ13C/‰ Calculated Ro/% Reference N2 CO2 CH4 C2H6 C3H8 iC4H10 nC4H10 iC5 nC5 C6+ CH4 C2H6 C3H8 nC4H10 Dabei gas field Dabei10 5 228.00-5 320.00 K1bs 0.32 0.23 96.33 2.57 0.37 0.07 0.07 0.02 0.02 0.00 0.97 -30.7 -21.0 -20.2 -21.7 1.8 Dabei 101-2 K1bs 1.27 0.50 95.29 2.22 0.40 0.09 0.10 0.04 0.03 0.05 0.97 -23.3 -16.8 -16.4 6.1 [12] Dabei 201-1 5 876.00-5 976.00 K1bs 0.41 0.53 96.72 1.78 0.30 0.07 0.07 0.03 0.02 0.06 0.98 -26.1 -19.9 -19.1 3.9 [12] Dabei209 5 776.00-5 878.00 K1bs 0.50 0.53 96.76 1.72 0.28 0.06 0.06 0.02 0.01 0.04 0.98 -25.9 -20.4 -20.1 4.0 Dabei301 6 930.00-7 012.00 K1bs 0.44 0.73 96.94 1.58 0.20 0.04 0.04 0.02 0.01 0.00 0.98 -29.6 -19.4 -18.9 -19.9 2.2 [12] Dabei302 7 209.00-7 244.00 K1bs 0.58 0.81 97.05 1.23 0.16 0.03 0.03 0.01 0.01 0.06 0.98 -29.4 -19.4 -20.0 2.3 Dabei304 6 873.00-6 991.00 K1bs 0.44 0.83 97.38 1.12 0.12 0.03 0.02 0.01 0.01 0.03 0.99 -27.2 -17.0 3.2 Dabei306 K1bs 2.12 0.57 95.92 1.15 0.12 0.03 0.02 0.01 0.00 0.03 0.99 -26.5 -15.3 3.6 Bozi gas field Bozi1 7 014.00-7 084.00 K1bs 0.42 0.21 90.68 6.64 1.34 0.28 0.24 0.09 0.04 0.06 0.91 Bozi101 6 921.00-7 091.00 K1bs 0.85 0.23 89.16 7.03 1.65 0.33 0.36 0.12 0.08 0.17 0.90 Bozi3 K1bs 1.74 0.48 87.70 7.41 1.78 0.29 0.33 0.09 0.06 0.12 0.90 -35.6 -25.1 -23.2 -24.6 0.8