新疆甜水海地区红山湖泉水化学特征及其意义

    Hydrochemical characteristics and significance of the Hongshan Lake in the Tianshuihai area, Xinjiang, China

    • 摘要: 通过开展甜水海地区红山湖的泉水与湖水水文地球化学相关测试分析,探索区内水化学成分形成过程以及水体地球化学特征与来源,从而获得与油气有关的水文地球化学信息。结果显示:红山湖泉水总体呈弱碱性,以微咸水为主,水体主要离子质量浓度随着矿化度增加而增加,水化学类型为Na-HCO3型;其主要补给为大气降水,且补给的大气降水在顺断裂或裂隙深循环过程中与围岩发生了水岩作用;矿化度、水化学类型以及泉水特征系数指示其代表的地下水体水动力较弱,且变质程度较深,与油田中油气伴生的地层水特征相似,推断该区地质环境整体利于油气形成与保存。

       

      Abstract: Focusing on the spring and lake water in the Hongshan Lake in the Tianshuihai area, Xinjiang, China, this study explored the formation process of the hydrochemical components in the water and the geochemical characteristics and sources of the water bodies through hydrogeochemical testing and analyses. Accordingly, the hydrocarbon-related hydrogeochemical information was obtained. The results are as follows: The spring water in the Hongshan Lake is weakly alkaline in general and dominated by brackish water. The mass concentration of main ions in the water bodies increases with increasing salinity. The water has a hydrochemical type of Na-HCO3 and is mainly charged by atmospheric precipitation, which interacts with the surrounding rocks during the deep circulation along faults or fractures. The salinity, hydrochemical type, and characteristic coefficient of spring water indicate that the groundwater in this area features weak hydrodynamic force and deep metamorphic degree, which are similar to the characteristics of the formation water associated with hydrocarbon in oil fields. Therefore, it can be inferred that the geological environment in this area is conducive to the generation and preservation of hydrocarbon resources.

       

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