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地球学报  2009 

天津市奥陶系热储层地热流体水化学特征及其主要影响因素

DOI: 10.3975/cagsb.2009.03.11

Keywords: 地热流体,奥陶系,基岩裂隙型热储层,水质类型,岩性化学分析,淋溶实验

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Abstract:

天津境内在宝坻断裂以南的广大平原区,蕴藏着丰富的中低温地热资源。在水平方向上地热流体自北东向南西矿化度逐渐增高,水质渐趋复杂。其中奥陶系热储层是位于最上层的基岩裂隙型热储层、紧邻上覆的孔隙型热储层。其地热流体的矿化度变化范围是天津地区所有热储层中最大的、水化学类型也出现天津地区所有热储层中所独有的高硫、高钙水型:SO4?Cl-Na?Ca。本文以分布在沧县隆起区中南部的奥陶系地热井为研究重点,通过地热流体水质检测、岩性化学分析、淋溶实验等手段,分析了形成奥陶系水质的主要影响因素。

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