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Formation conditions and accumulation characteristics of Bozhong 19-6 large condensate gas field in offshore Bohai Bay Basin
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Changgui XU,Haibo YU,Jun WANG,Xiaojian LIU
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Table 2 Statistics on natural gas components and carbon isotopes in Bozhong 19-6 gas field.
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| Well | Depth/m | Horizon | Natural gas component/% | H2S content/
10-6 | Natural gas carbon isotope/‰ | | CH4 | C2H6 | C3H8 | CO2 | CH4 | C2H6 | C3H8 | CO2 | | BZ19-6-1 | 3 566.8-3 634.0 | Kongdian Formation | 76.75 | 8.68 | 2.98 | 9.37 | 11.23 | -38.50 | -27 | -25.50 | -7.0 | | BZ19-6-1 | 4 043.4-4 142.0 | Archaeozoic | 70.85 | 8.04 | 2.82 | 16.27 | 14.19 | -38.80 | -27 | -25.60 | -3.6 | | BZ19-6-2Sa | 3 873.7-3 923.5 | Archaeozoic | 78.27 | 8.19 | 2.59 | 9.35 | 11.76 | | | | | | BZ19-6-2Sa | 3 879.0-3 998.7 | Archaeozoic | 77.78 | 8.22 | 2.78 | 9.19 | 19.81 | | | | | | BZ19-6-4 | 4 411.0-4 499.8 | Archaeozoic | 75.41 | 8.83 | 3.01 | 10.49 | 36.63 | | | | | | BZ19-6-5 | 3 500.0-3 566.0 | Kongdian Formation | 77.40 | 8.21 | 2.95 | 9.15 | 10.44 | | | | | | Average | 76.08 | 8.36 | 2.85 | 10.64 | 17.34 | -38.65 | -27 | -25.55 | -5.3 |
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