0 引言
1 区域地质背景
2 四川盆地五峰组—龙马溪组页岩气碳同位素整体特征
2.1 页岩气平面碳同位素特征
表1 四川盆地不同地区五峰组—龙马溪组页岩气碳同位素值统计Table 1 Wufeng-Longmaxi formations shale gas carbon isotope of different area in Sichuan Basin |
地区 | 井号 | 湿度/% | δ13C/‰ | δ13C平均值/‰ | 数据来源 | ||||
---|---|---|---|---|---|---|---|---|---|
CH4 | C2H6 | C3H8 | CH4 | C2H6 | C3H8 | ||||
威远 | W201 | 0.48 | -37.3 | -38.2 | -36.0 | -39.5 | -43.5 | [14] | |
W201 | 0.48 | -36.9 | -37.9 | ||||||
W201-H3 | 0.37 | -35.6 | -39.4 | ||||||
W201-H3 | 0.36 | -35.4 | -40.8 | ||||||
W201-H1 | 0.34 | -35.1 | -38.7 | ||||||
W201-H1 | 0.37 | -35.4 | -37.9 | ||||||
W202 | 0.70 | -36.9 | -42.8 | -43.5 | |||||
W203 | 0.58 | -35.7 | -40.4 | ||||||
富顺—永川 | L101 | 0.24 | -33.2 | -33.1 | -33.0 | -35.0 | -39.4 | [14] | |
Y201-H2 | 0.34 | -33.8 | -36.0 | -39.4 | |||||
H201-H | 0.69 | -32.0 | -35.9 | ||||||
南川阳春沟构造 | SY3 | 0.9 | -34.7 | -35.1 | -32.0 | -34.4 | 本文 | ||
SY3 | 2.2 | -33.1 | -36.2 | ||||||
SY3 | 2.4 | -34.2 | -35.6 | ||||||
SY3 | 2.6 | -35.0 | -35.5 | ||||||
南川平桥南构造 | JY10-10 | -29.9 | -32.9 | -29.8 | -32.95 | 本文 | |||
JY10-10 | -29.9 | -33.0 | |||||||
JY10-10 | -29.8 | -33.2 | |||||||
JY10-10 | -29.8 | -32.7 | |||||||
焦石 | JY1HF | -30.1 | -35.5 | -30.2 | -34.6 | -36.7 | [15] | ||
JY1HF | -30.6 | -34.1 | -36.3 | ||||||
JY1-3HF | -29.4 | -34.5 | -36.3 | ||||||
JY1-3HF | -29.5 | -34.6 | -35.0 | ||||||
JY4HF | -31.2 | -35.1 | -36.3 | ||||||
JY6-2HF | -30.3 | -34.3 | |||||||
JY6-2HF | -30.0 | -34.3 | |||||||
JY7-2HF | -29.1 | -33.9 | -37.1 | ||||||
JY9-2HF | -30.0 | -34.4 | -37.5 | ||||||
JY10-2HF | -31.9 | -35.1 | |||||||
JY12-3 | 0.69 | -30.3 | -34.7 | -38.4 | |||||
JY84-2 | 0.2 | -30.9 | -33.0 | -30.0 | -33.1 | 本文 | |||
JY84-2 | 0.4 | -29.5 | -33.0 | ||||||
JY84-2 | 0.1 | -32.0 | -32.9 | ||||||
JY84-3 | 0.2 | -28.6 | -33.3 | ||||||
JY84-3 | 0.2 | -29.8 | -33.1 | ||||||
JY84-3 | 0.2 | -29.3 | -33.1 | ||||||
丁山 | DY5 | 0.9 | -29.2 | -33.0 | -29.3 | -33.5 | 本文 | ||
DY5 | 0.4 | -29.9 | -33.8 | ||||||
DY5 | 0.2 | -28.5 | -35.0 | ||||||
DY5 | 0.4 | -29.6 | -32.0 | ||||||
长宁—昭通 | Z104 | 0.53 | -26.7 | -31.7 | -33.1 | -28.0 | -33.2 | -35.2 | [16] |
YSL1-1H | 0.48 | -27.4 | -31.6 | -33.2 | |||||
NH2-1 | 0.53 | -28.7 | -33.8 | -35.4 | |||||
NH2-2 | 0.48 | -28.9 | -34.0 | ||||||
NH3-1 | 0.55 | -27.6 | -32.3 | -35.0 | |||||
NH3-2 | 0.46 | -28.9 | -33.4 | -36.0 | |||||
NH3-6 | 0.53 | -29.4 | -33.1 | -35.1 | |||||
YH1-3 | 0.61 | -27.7 | -32.8 | -36.0 | |||||
YH1-5 | 0.50 | -26.8 | -33.1 | -35.7 | |||||
N201-H1 | 0.51 | -27.0 | -34.3 | ||||||
N201-H1 | 0.54 | -27.8 | -34.1 | ||||||
N211 | 0.35 | -28.4 | -33.8 | -36.2 |