Research Article
Comprehensive Evaluation of the Hydrocarbon Preservation Conditions in the Complex Tectonic Area of the Southwestern Sichuan Basin, China
Table 1
Chemical characteristics of shallow and deep formation water in key wells in southwest Sichuan and its relationship with main control faults.
| | Well | Stratigraphic unit | Fault | Extension length (km) | Fault displacement (m) | Distance to main control fault (km) | Mineralization (g/L) | Water type |
| | Woshen 1 | Cambrian bottom | Wo 2 | 13.65 | 1000 | 0.4 | 0.84 | NaHCO3 | | Zhougong 1 | Zhou 2 | 37.75 | 1820 | 0.65 | 3.58 | NaHCO3 | | Hanshen 1 | 24 | 25.97 | 600 | 1.2 | 2.35 | Na2SO4 | | Gong 2 | Gong 1 | 36.21 | 2000 | 2.4 | 15.3 | NaHCO3 | | Gongshen 1 | Gong 1 | 36.21 | 2000 | 3.1 | 74.1 | CaCl2 |
| | Zhougong 1 | Bottom of Upper Permian | A | 20.94 | 700 | 0.9 | 0.84 | NaHCO3 | | Ma 1 | B | 24.22 | 500 | 1.4 | 3.58 | Na2SO4 | | Han 1 | C | 23.33 | 450 | 1.5 | 0.878 | NaHCO3 | | Ta 6 | E | 17.79 | 100 | 2.2 | 35.76 | CaCl2 | | Zi 7 | F | 38.9 | 200 | 3.1 | 37.43 | CaCl2 | | Gong 2 | G | 15.71 | 1000 | 3.4 | 6.08 | NaHCO3 | | Laolong 1 | H | 13.3 | 200 | 3.65 | 21.6 | CaCl2 | | Zi 2 | F | 38.9 | 200 | 4.7 | 73.44 | CaCl2 | | Zi 9 | F | 38.9 | 200 | 4.9 | 51.13 | CaCl2 |
| | Han 2 | Triassic bottom | Han 20 | 5.83 | 100 | 0.6 | 0.72 | NaHCO3 | | Ma 4 | Ma 5 | 9.30 | 400 | 3.85 | 41.43 | CaCl2 | | Han 5 | 11 | 7.97 | 300 | 0.83 | 0.81 | Na2SO4 | | Gaoxun 1 | 2 | 7.05 | 100 | 1.1 | 6.65 | Na2SO4 | | Han 3 | Han 12 | 20.67 | 600 | 1.6 | 8.82 | CaCl2 | | Zhougong 2 | Zhou 2 | 48.29 | 900 | 1.62 | 16.66 | Na2SO4 | | Wo 1 | 26 | 7.7 | 100 | 2.1 | 19.75 | Na2SO4 | | Ma 12 | Ma 3 | 7.31 | 100 | 4.1 | 46.68 | CaCl2 |
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