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洛阳龙门地热田地热地质特征及开发利用对策

2021-09-05王现国李扬张晓丽罗锐叶建何佳晨

人民黄河 2021年8期
关键词:洛阳

王现国 李扬 张晓丽 罗锐 叶建 何佳晨

摘 要:洛阳龙门地热田位于洛阳断陷盆地西南部,依据地热地质资料,分析研究了龙门地热田边界、空间分布特征、形成机制、地球物理化学特征、地热水温度场、热储构造发育特征,同时对龙门地热田地热水的赋存、运移条件等进行了分析探讨。该地热田的形成受地质构造控制,属构造热储对流型地热田,草店断裂(F1)和魏湾断裂(F2)为龙门地热田的控热构造,伊河断层(F3)、朝阳—首阳山断层(F4)为地热田的导热、导水构造,寒武系灰岩为龙门地热田的热储层,上覆数百米的二叠系、三叠系砂岩、泥岩互层为该地热田热储层的盖层,龙门地热田地热水水温高达98.5 ℃,开发利用前景广阔。

关键词:地热地质;形成条件;龙门地热田

中图分类号:P314.1;TV211.1+2 文献标志码:A

doi:10.3969/j.issn.1000-1379.2021.08.018

引用格式:王现国,李扬,张晓丽,等.洛阳龙门地热田地热地质特征及开发利用对策[J].人民黄河,2021,43(8):96-101.

Abstract: The Luoyang Longmen geothermal field is located in the southwestern part of the Luoyang fault basin. The formation conditions are strictly controlled by geological structures. It belongs to the convective geothermal field of structural thermal storage. The heat conduction and water conducting structure, ∈3 is the thermal reservoir of the Longmen geothermal field, and the overlying hundreds of meters of P2 and T1+2 become its thermal reservoir cap layer. The discovery of the warm geothermal water (98.5 ℃) in the Longmen geothermal field provides broad prospects for the development and utilization of the geothermal field. Based on the geothermal exploration data over the years, starting from the analysis of the boundary, spatial distribution characteristics, and thermal storage structure development characteristics of the Longmen geothermal field, the paper analyzed and discussed the formation mechanism of the Longmen geothermal field, geophysics, geochemistry, geothermal water temperature field characteristics, geothermal water, storage and transportation conditions, etc.

Key words: geothermal geology; formation conditions; Longmen geothermal field

洛阳龙门地热田位于世界文化遗产龙门石窟风景区内,属构造热储对流型地热田,温泉沿长1 400 m、宽300 m的伊河河漫滩及两岸坡脚分布,面积约0.42 km2,共出露温泉19处,泉水温度多为24~26 ℃,最高为43 ℃。温泉多从寒武系灰岩中涌出,在温泉出露南端伊河河漫滩上有一处热水湖沼地,长约60 m、宽约20 m。龙门玉隆苑园区地热井水温达98.5 ℃,涌水流量达96 m3/h,而豫西地区温泉水温一般不超过60 ℃,龙门地热田这一中温地热井的钻探成功,表明洛阳市区地热资源开發利用前景广阔[1-2]。

1 区域地质构造

龙门地热田所在的洛阳盆地由华北地台发展而成。……

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