Stable carbon and hydrogen isotopic characteristics of natural gas from Taibei sag, Turpan-Hami Basin, NW China

NI Yunyan,LIAO Fengrong,GONG Deyu,JIAO Lixin,GAO Jinliang,YAO Limiao

Table 1 Molecular composition, stable carbon and hydrogen isotopes, dryness coefficient and calculated gas maturity (Ro) of gases from the Baka, Shanshan, Qiuling and Wenmi oil fields, Taibei sag, Turpan-Hami Basin.

Area Well Strata Depth/ m Composition/% δ13C/‰ δD/‰ Dryness Ro/% CH4 C2H6 C3H8 C4H10 C5H12 N2 CH4 C2H6 C3H8 C4H10 C5H12 CH4 C2H6 C3H8 C1/C1-5 ① ② ③ ④ Baka Ke19-2 J1b 3 397.0- 3 429.0 75.97 12.33 6.20 3.94 1.54 0.02 -41.7 -27.3 -25.4 -24.3 -254 -218 -207 0.76 0.68 0.64 0.30 0.70 Ke21-5 J1b 3 484.2- 3 528.0 85.72 8.86 3.32 1.60 0.49 0 -40.8 -27.0 -25.1 -24.9 -24.0 -253 -215 -203 0.86 0.72 0.68 0.35 0.73 Ke21-2 J1b 3 436.0- 3 525.0 86.79 8.35 2.96 1.45 0.45 0 -40.4 -27.0 -25.5 -24.5 -24.3 -252 -218 -208 0.87 0.74 0.70 0.38 0.74 Ke19-8 J1b 3 397.0- 3 620.0 84.47 9.52 3.64 1.79 0.57 0.01 -41.2 -26.7 -24.7 -24.1 -22.5 -254 -214 -201 0.84 0.70 0.66 0.33 0.71 Ke21C J1b 3 465.0- 3 636.0 97.94 0.80 0.51 0.51 0.21 0.02 -40.8 -27.1 -25.1 -23.4 -254 -219 -200 0.98 0.72 0.68 0.35 0.73 Ke19 J2x 2 374.6- 3 195.0 92.83 6.41 0.41 0.31 0.04 0 -42.3 -24.9 -23.8 -24.5 -24.1 -252 -200 -199 0.93 0.66 0.62 0.28 0.68 Ba23 J2s—J2x 1 174.0- 1 951.2 89.07 8.38 1.29 1.07 0.18 0.01 -44.9 -25.4 -18.0 -22.1 -23.1 -256 -200 -174 0.89 0.57 0.54 0.18 0.60 Qiuling Ling5-5 J2s 2 279.7- 2 367.0 81.49 9.76 5.39 2.66 0.70 0 -42.3 -27.8 -26.5 -25.9 -24.9 -263 -235 -216 0.81 0.66 0.63 0.28 0.68 Ling6- 301 J2s 2 514.1- 2 601.0 78.67 12.70 5.96 2.24 0.42 0.01 -42.2 -27.7 -26.6 -25.9 -24.9 -267 -235 -216 0.79 0.66 0.63 0.28 0.68 Ling4- 31 J2q 2 043.4- 2 050.0 83.47 8.94 4.83 2.33 0.42 0.01 -42.4 -27.9 -26.1 -25.9 -24.7 -265 -232 -216 0.83 0.66 0.62 0.27 0.68 Shanshan SN3-15 J2s 2 930.4- 2 950.0 75.30 11.83 7.82 4.16 0.88 0 -42.4 -27.5 -25.6 -25.5 -24.6 -260 -233 -218 0.75 0.66 0.62 0.27 0.68 SN1C J2s 3 254.2- 3 268.0 87.31 4.62 4.38 3.00 0.66 0.03 -41.3 -27.7 -25.9 -25.8 -25.5 -252 -224 -214 0.87 0.70 0.66 0.32 0.71 Shan13- 61C J2x 3 393.4- 3 414.0 75.55 9.23 7.17 6.00 2.03 0 -43.2 -28.2 -27.1 -26.7 -25.9 -267 -236 -220 0.76 0.62 0.59 0.24 0.65 Wenmi Wen8- 507 J2s 2 342.0- 2 359.0 82.75 9.32 4.62 2.60 0.70 0.01 -40.4 -26.4 -25.4 -25.4 -24.8 -267 -231 -215 0.83 0.74 0.70 0.38 0.74 WQ12 J2x 2 770.0- 2 802.2 84.87 8.93 3.82 1.87 0.51 0 -41.3 -26.8 -26.0 -25.6 -25.0 -271 -235 -222 0.85 0.70 0.66 0.32 0.71 Wen8- 508 J2s 2 493.0- 2 500.0 65.84 16.84 10.11 5.59 1.61 0.01 -40.9 -26.6 -25.7 -25.8 -24.9 -272 -235 -218 0.66 0.72 0.68 0.35 0.73 Wen8- 48 J2s 2 400.0- 2 410.0 80.56 11.01 5.17 2.58 0.68 0 -41.2 -26.9 -25.4 -25.3 -25.1 -269 -232 -217 0.81 0.70 0.66 0.33 0.71 Wen5- 45 J2s 2 467.0- 2 491.0 80.44 9.83 5.46 3.25 1.01 0.01 -41.8 -27.0 -25.1 -24.5 -24.3 -266 -228 -213 0.80 0.68 0.64 0.30 0.69 Wen5- 216 J2s 2 484.0- 2 492.0 70.21 15.84 8.92 4.14 0.89 0 -41.0 -26.8 -25.1 -24.4 -24.0 -268 -229 -215 0.70 0.71 0.67 0.34 0.72 Wen5- 317 J2s 2 460.0- 2 469.0 78.57 11.95 5.95 2.86 0.66 0.01 -40.8 -27.0 -25.2 -24.7 -23.9 -265 -229 -215 0.79 0.72 0.68 0.35 0.73 WQ17 J2q- J2x 2 287.0- 2 778.0 82.02 9.07 5.06 2.96 0.88 0 -41.6 -26.9 -25.3 -24.8 -24.3 -265 -225 -209 0.82 0.69 0.65 0.31 0.70 Wen5- 408 J2s 2 481.0- 2 519.0 69.11 14.68 9.41 5.43 1.36 0 -41.5 -26.9 -25.3 -24.9 -24.0 -267 -231 -216 0.69 0.69 0.65 0.31 0.70 Wen5- 57 J2s 2 332.6- 2 398.6 80.75 9.22 5.43 3.56 1.04 0 -41.0 -26.5 -25.1 -24.8 -24.1 -263 -228 -213 0.81 0.71 0.67 0.34 0.72