| 赵娜,王光辉,江国胜,王鹏.天津东丽湖地区地热流体地球化学特征及其赋存环境[J].地质找矿论丛,2016,31(1):142-146 |
| 天津东丽湖地区地热流体地球化学特征及其赋存环境 |
| Geochemical characteristics and occurrence environment of geothermal water in Dongli Lake area,Tianjin,China |
| 投稿时间：2015-01-09 |
| DOI：10.6053/j.issn.1001-1412.2016.01.019 |
| 中文关键词: 东丽湖地区地热流体 地球化学特征 赋存环境 沧东断裂 天津市 |
| 英文关键词:geothermal fluid in Dongli Lake area geochemical characteristic occurrence environment cangdong fault zone Tianjin |
| 基金项目:中央财政矿产资源节约与综合利用项目和天津市滨海新区东丽湖地区基岩热储地热资源保护工程项目(编号:国土房任[2010]12号)资助。 |
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| 中文摘要: |
| 东丽湖地区位于山岭子地热异常区中心地带,沧东断裂带之上,有3个热储层。其中,奥陶系与雾迷山组水质相似,水化学类型以Cl·HCO3·SO4-Na和Cl·SO4·HCO3-Na为主,矿化度1 400~1 750 mg/L,为部分平衡水;而明化镇组以HCO3·Cl-Na为主,矿化度1 500 mg/L,为完全平衡水。地热流体γ(Na)/γ(Cl)均较高,二氧化碳分压(pco2)为10-1.98~10-2.7 Mpa,地下水碳酸平衡具有开系统的特征。流体中方解石、白云石、文石处于微饱和状态。深部奥陶系水质与雾迷山组热储温度适合用玉髓温标计算,而浅部明化镇组热储温度则用Na-K温标计算。东丽湖奥陶系与雾迷山组连通性较好,垂向上对流强烈。明化镇储层局部地区受到了基岩裂隙型地热流体的垂向补给。 |
| 英文摘要: |
| Dongli Lake area is located in the center of Shan Lingzi geothermal anomaly at the Cangdong fault zone with three geothermal reservoirs. The water of Ordovician System and Wumishan Formation is similar in quality with the main hydrochemical type of Cl·HCO3·SO4-Na and Cl·SO4·HCO3-Na, salinity of 1 400-1 750 mg/L and partial equilibrium water. Water in Minghuazhen Formation is mainly the HCO3·Cl-Na type, the complete equilibrium water with salinity of 1 500 mg/L, higher γ(Na) /γ(Cl) ratio, carbon dioxide partial pressure (pco2) 10-1.98 to 10-2.7 Mpa, carbonate equilibrium characterized by an open system and near saturation of calcite, dolomite, aragonite. Quality, temperature of the deep reservoir in Ordovician system and Wumishan Formation is suitably calculated with chalcedony geothermometer, temperature of the shallow reservoir in Minghuazhen Formation with the K-Na geothermometern. In Dongli Lake area the geothermal water in Ordovician system and Wumishan Formation is well connected and convects strongly in vertical direction. Reservoir in Minghuazhen Formation is locally supplied with water through vertical cracks in the bedrock. |
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