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科技导报  2015 

汝城干热岩地热资源研究

DOI: 10.3981/j.issn.1000-7857.2015.19.011, PP. 68-73

Keywords: 干热岩,地热资源,大地热流,汝城

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Abstract:

汝城热水镇出露98℃天然热泉,该地区深部干热岩地热资源相当可观。通过大量钻孔地温测量和大地热流测试等勘探工作,评估了该地区干热岩地热资源的基本情况。勘探结果表明,研究区内平均地温增温梯度为18.7℃/100m,最高值达35.2℃/100m,主要高温钻孔的大地热流量介于60~170MW/m2,地热资源较为可观。该地热田的热源来自深部岩浆余热,热储主要是F1、F3断裂带上盘及其他次级断层派生的密集裂隙系统。区内热水河以东花岗岩体为浅部水热热储盖层;热水河以西震旦系的板岩为深部热源盖层。模拟结果表明,研究区地热田热储层下底面温度为260℃,热储层上顶面温度为255℃,热储层以上厚度为3500~4000m。汝城地区热储埋藏深度较浅,热储温度较高,是较好的干热岩开发靶区。

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