Breakthrough of shallow shale gas exploration in Taiyang anticline area and its significance for resource development in Zhaotong, Yunnan Province, China

LIANG Xing,XU Zhengyu,ZHANG Zhao,WANG Weixu,ZHANG Jiehui,LU Huili,ZHANG Lei,ZOU Chen,WANG Gaocheng,MEI Jue,RUI Yun

Table 2 Comparison of components and contents of shallow shale gas in Taiyang anticline area and the medium-deep shale gas in Huangjinba-Zijinba.

Type Block Well name Depth/m Components/% Contents/(m3•t-1) Formation pressure coefficient CH4 C2H6 C3H8 CO2 N2 He Total gas content Free gas Adsorbed gas Shallow gas Taiyang Y102 772.29-772.59 91.19 0.64 0 0.14 8.01 0.01 3.81 1.48 2.33 1.43 Y103 1 086.69-1 086.96 96.67 1.31 0 0.11 1.91 0 4.35 2.05 2.3 1.25 Y104 1 202.12-1 202.40 96.88 1.09 0 0.06 1.97 0 4.15 2.04 2.11 1.29 Y105 1 691.74-1 691.99 96.62 0.68 0 0.06 2.64 0 5.34 3.00 2.34 1.29 Y107 1 255.25-1 255.51 97.64 0 0 0.24 2.12 0 5.07 2.67 2.40 1.37 Y108 1 639.59-1 639.86 96.63 0.16 0 0.05 3.16 0 Average 95.94 0.65 0 0.11 3.30 0 Medium-deep gas Huangjinba YS108 2 498.2-2 499.3 98.36 0.24 0 0.13 1.27 0 5.2 3.7 1.6 1.96 YS111 2 386.4-2 392.6 96.82 0.47 0 0.14 2.57 0 4.4 2.6 1.8 1.80 Ning 201 well block N 201 2 504.0-2 525.0 98.71 0.53 0.01 0.4 0.35 0 5.8 4.0 1.8 2.03 Zijinba YS112 2 455.1-2 456.6 98.35 0.51 0 0.09 1.05 0 5.7 3.8 1.9 1.70 YS115 2 254.8-2 256.3 97.61 0.74 0 0.19 1.46 0 5.9 4.1 1.8 1.70 Average 98.00 0.49 0 0.19 1.1.32 0