| 秦莉红,石晓今,于彦,刘杰,林溦,康楠.天津市蓟县系雾迷山组地热流体地球化学特征[J].地质找矿论丛,2019,34(1):150-154 |
| 天津市蓟县系雾迷山组地热流体地球化学特征 |
| Geochemical characteristics of geothermal fluid in the Wumishan Formation of Jixian System in Tianjin |
| 投稿时间：2017-09-11 修订日期：2017-10-25 |
| DOI：10.6053/j.issn.1001-1412.2019.01.020 |
| 中文关键词: 雾迷山组 水化学 地热温标 成因 天津 |
| 英文关键词:Wumishan Formation of Jixian System geochemistry geothermometer origin Tianjin |
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| 摘要点击次数: 1045 |
| 全文下载次数: 752 |
| 中文摘要: |
| 蓟县系雾迷山组是天津地区最重要的基岩裂隙型热储层。通过对天津市平原区不同构造单元的70组蓟县系雾迷山组地热流体样品的水化学测试，从其化学类型、特殊组分、热储温度及地热水成因等方面进行分析研究。结果表明，流体化学类型北部以HCO3·SO4-Na、HCO3·SO4·Cl-Na为主，往南变为Cl·HCO3-Na、Cl·HCO3·SO4-Na、Cl·SO4·HCO3-Na为主，南部为Cl·SO4-Na为主；地热流体中的氟、偏硅酸、偏硼酸、温度均达到了"有医疗价值浓度"或"命名矿水浓度"标准；由于雾迷山组地热流体水-岩之间未达到离子平衡状态，K-Mg温标不适用于本地区热储温度的计算，采用玉髓温标来预测热储温度的方法比较适用于本地区的热储。通过成因分析可知该热储属于贫溴的含岩盐地层溶滤水，具有陆相沉积水的特征。 |
| 英文摘要: |
| Wumishan formation of Jixian System is the most important bedrock fracture thermal reservoir in Tianjin area. 70 sets of geothermal fluid sample from different tectonic units of plain area in Tianjin city are analyzed in their water chemistry and the aspects of chemical type, special composition, temperature and genesis of geothermal fluid are studied. The result shows that in the north part the water chemistry type is dominated by HCO3·SO4-Na, HCO3·SO4·Cl-Na, southward by Cl·HCO3-Na, Cl·HCO3·SO4-Na, Cl·SO4·HCO3-Na and in the south part by Cl·SO4-Na. Temperatures, fluorine, metasilicic acid and metaboric acid concentration of the geochermal fluid reach the medical standard mineral water standard. Because the geothermal fluid-rock reaction is not in ionic equilibrium K-MG thermometric scale is not suitable for the prediction of the local reservoir temperature. Origin of geothermal water reveals that the geothermal reservoir belongs to bromide-poor rock salt layer infiltration water type characterized by continental sedimentary water. |
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