山东省临清地热田地热水化学特征及热水起源研究

Hydrochemistry and Origin of the Linqing Geothermal Field in ShanDong Province

通过近几年对临清地热田地下热水热储特征、化学成分、地热温标、热水演化及起源的勘查研究,笔者认为地下热水的形成受区内深大断裂和基底构造对地热形成的控制,地下热水成分以Na+、Cl-、SO42-为主,矿化度较大为咸水,PH值呈弱碱性。热水中含有丰富微量元素,热水起源主要为大气降水成因,并形成于弱还原环境。在其运移过程中,随深循环深度的增大不断从岩石中获取热量逐步加热,在断裂带附近沟通深部热源形成由赋水性强的砂层所构成的深部低温热储系统。

The authors studied the geothermal reservoir characteristics, chemical composition, geothermometer, evolution and origin of the geothermal water in the Lianqing geothermal field based on the analysis of project research results recently years. The study shows that the formation of the geothermal water is controlled by deep faults and basement structure in the area. And the main chemical composition of the geothermal water is Na＋, CI- and SO4^2-, TDS is big, pH is weak alkalescent. There are abundance microelements in the hot water. The hot water is mainly from atmosphere precipitation, formed in weak reducing environment. When the rain permeates into the underground, with the increase of the depth of the deep circulating, it can constantly get heat from the hot rock, and near the fault zone deep heat source formed with the assignment of strong water sand layer, forming the deep low temperature thermal storage system.