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

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。

Basic Magmatic Formations within the Eastern Part of the Bukk Mountains, North-East Hungary

The macro- and microscopic results were that this body of basalt tectonically heavily loaded, strongly altered by clay minerals and characterized by hydro-metasomatic alteration. The geochemical analyzes revealed that the original magma could be a mantle origin of high iron and magnesium containing basalt （tholeiites, 10%-15%）. As regards to the palaeogeographic environment, it can be said that due to the periodic sea flooding, it pushed into a lower area, covered with sediment where the surrounding areas were highlighted （biikkszentkereszt and bukkszentlaszl6 tufts）.