Reservoir Evaluation and Development ›› 2022, Vol. 12 ›› Issue (1): 10-28.doi: 10.13809/j.cnki.cn32-1825/te.2022.01.002
• Specialist Forum • Previous Articles Next Articles
LIU Shugen1,2(),RAN Bo1,YE Yuehao1,WANG Shiyu3,YANG Di1,LUO Chao4,HAN Yuyue1,SONG Jinmin1,ZHANG Xuan4
Received:
2021-10-09
Online:
2022-02-26
Published:
2022-03-24
CLC Number:
LIU Shugen, RAN Bo, YE Yuehao, WANG Shiyu, YANG Di, LUO Chao, HAN Yuyue, SONG Jinmin, ZHANG Xuan. Outcrop of Ordovician Wufeng Formation-Silurian Longmaxi Formation in Qilong Village, Xishui, Guizhou[J].Reservoir Evaluation and Development, 2022, 12(1): 10-28.
Table 1
Basic characteristics and comprehensive identification of anoxic environment[23,24]"
判别 指标 | 水体溶氧量(mL/L) | 标型 矿物 | 黄铁矿矿化度(DOP) | 还原态/ 氧化态 | 微量元素 含量 | V/(V+Ni) | V/Cr | Ni/Co | U/Th | Au (mg/L) | 铀 异常 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
氧亏损环境 | 缺氧 | 0.2 | 原生金属 硫化物 | 0.4~0.7(无H2S);大于0.7(含H2S) | Fe2+/Fe3+>1 | 过渡金属、有机硫含量高 | >0.85 | >4.25 | >7.0 | >1.25 | >12.0 | >1 |
贫氧 | 0.2~2.0 | 0.85~0.60 | 2.0~4.25 | 5.0~7.0 | 0.75~1.25 | 5.0~12.0 | >1 | |||||
富氧环境 | >2.0 | 褐铁矿、 Mo氧化物 | <0.4 | Fe2+/Fe3+<1 | 过渡金属 含量低 | <0.60 | <2.0 | <5.0 | <0.75 | <5.0 | <1 |
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