0 引言
1 渤中21⁃22构造区油气地质特征
2 渤中21⁃22构造区天然气地球化学特征与成因
2.1 渤中21-22构造区天然气地球化学特征
表1 渤中21-22构造区天然气地球化学特征Table 1 Geochemical characteristics of natural gas in Bozhong 21-22 structure |
| 样品 编号 | 井名 | 层位 | 深度/m | 气体主要成分/% |
/‰ |
/‰ |
/‰ |
/‰ | R/Ra | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CO2 | N2 | CH4 | C2H6 | C3H8 | ||||||||||
| YP001 | A井 | Pz | 4 354.0~4 611.0 | 34.60 | 0.39 | 59.60 | 3.32 | 0.78 | 1.24 | -35.3 | -22.9 | -22.7 | ||
| YP002 | A井 | Pz | 4 354.0~4 611.0 | 34.60 | 0.36 | 59.66 | 3.29 | 0.78 | 1.21 | -35.3 | -22.7 | -22.3 | ||
| YP003 | B井 | PZ | 4 632.97~4 933.0 | 49.06 | 0.81 | 43.95 | 2.34 | 0.57 | 0.74 | |||||
| YP004 | B井 | PZ | 4 632.97~4 933.0 | 47.88 | 0.82 | 47.21 | 2.04 | 0.48 | 0.86 | |||||
| YP005 | C井 | Pz | 5 114.5~5 363.0 | 51.02 | 0.11 | 45.93 | 2.04 | 0.46 | 0.44 | |||||
| YP006 | D井 | PZ | 4 865.37~5 141.0 | 50.12 | 0.12 | 40.04 | 2.15 | 0.47 | 1.23 | -42.6 | -27.6 | -3.2 | 6.4 | |
| YP007 | D井 | PZ | 4 865.37~5 141.0 | 48.92 | 0.58 | 46.70 | 2.35 | 0.58 | 0.87 | -42.6 | -27.5 | -0.4 | ||
| YP008 | E井 | PZ | 5 109.9~5 255.0 | 29.19 | 1.88 | 58.50 | 5.14 | 1.07 | 0.85 | -1.9 | ||||
|
2.2 CO2成因类型
2.3 烷烃气成因
图4 渤中21-22构造区天然气“Bernard”分类图版Fig.4 The“Bernard”classification plate of natural gases in Bozhong 21-22 structure |
图5 渤中21-22构造区天然气δ13C1与δ13C2交会图Fig.5 Crossplot of carbon isotopes of methane and ethane for natural gases in Bozhong 21-22 structure |
3 CO2与油气成藏过程分析
4 CO2对油气成藏的影响
图10 渤中21-22构造区古生界潜山岩屑抽提物的族组成Fig.10 Gross compositions of cuttings extracts of Paleozoic buried-hill in Bozhong 21-22 structure |

甘公网安备 62010202000678号