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Reservoir characteristics and genetic differences between the second and fourth members of Sinian Dengying Formation in northern Sichuan Basin and its surrounding areas
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Yong LI,Xingzhi WANG,Mingyou FENG,Deming ZENG,Shengyang XIE,Rui FAN,Liangjun WANG,Tao ZENG,Xuefei YANG
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Table 2 Electron microprobe analysis results of interstitial dolomite in Deng-2 dissolved cavities.
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| Type | Well | MgO/ | SrO/ | Na2O/ | K2O/ | BaO/ | MnO/ | FeO/ | | % | % | % | % | % | % | % | Grape lace-shaped dolomite
in phase-I | MS1 | 21.30 5 | 0 | 0.00 9 | 0.00 5 | 0 | 0.00 2 | 0.01 2 | | TX1 | 21.36 5 | 0 | 0.01 1 | 0 | 0 | 0.04 7 | 0.01 8 | | Foliated dolomite in phase-II | MS1 | 21.50 9 | 0.09 6 | 0.03 4 | 0.01 6 | 0.00 4 | 0.01 8 | 0.01 6 | | TX1 | 21.91 4 | 0.06 4 | 0.06 2 | 0.02 2 | 0 | 0.06 0 | 0.03 2 | | Crystalline dolomite in phase-III | MS1 | 21.60 4 | 0.05 3 | 0.01 4 | 0.01 1 | 0.04 6 | 0.02 7 | 0.07 4 | | TX1 | 21.44 6 | 0.06 8 | 0.01 9 | 0.01 7 | 0.00 9 | 0.01 2 | 0 |
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