| 刘国营,韩长寿.河南平顶山市北部寒武系热储层水的同位素组成及其地质意义[J].矿产勘查,2021,12(12):2368-2373 |
| 河南平顶山市北部寒武系热储层水的同位素组成及其地质意义 |
| Isotope composition and geological signi.cance of Cambrian thermal reservoir water in northern Pingdingshan City, Henan Province |
| 投稿时间：2021-01-21 |
| DOI： |
| 中文关键词: 地热 同位素 地下水年龄 平顶山市 |
| 英文关键词: geothermal isotope groundwater age Pingdingshan City |
| 基金项目: |
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| 中文摘要: |
| 为了解河南平顶山市北部寒武系含水层的水文地质及热储特征，为该区地热开发提供地质依据，在李口向斜东部施工的首口地热井，在埋深1400~1900 m的寒武系灰岩地层中发现了良好的地热储层。通过对该储层水的氢、氧、碳同位素分析，结果δ18O为-10.9‰，δD为-79‰，T浓度值小于1 T.U，水的年龄为2.92万年。表明寒武系地层中的水来源于大气降水，主要由老水组成，且基本处在封闭状态。二叠系石千峰组含水层与寒武系含水层的水质分析结果表明，后者的F、Sr含量是前者的5倍以上，Ca、Mg也明显高于前者。同位素组成特征和水质分析结果表明上、下含水层没有直接连通，水力联系不大。 |
| 英文摘要: |
| To understand the hydrogeological and thermal storage characteristics of the Cambrian aquifer in the north of Pingdingshan City and to provide geological basis for geothermal development, the .rst geothermal well constructed in the east of Likou syncline was found. Good geothermal reservoirs were found in Cambrian limestone strata with a depth of 1400~1800 m. Through the analysis of hydrogen, oxygen and carbon isotopes of the reservoir water, the results show that δ18O is -10.9‰, δD is -77‰, and the T concentration is less than 1 T.U, the age of water is 29200 years. It shows that the water in Cambrian strata comes from atmospheric precipitation, mainly composed of old water, and is basically in a closed state. The water quality of Permian Shiqianfeng formation aquifer and Cambrian aquifer shows that the F、Sr content of the latter is more than 5 times that of the former, and the Ca、Mg is obviously higher than that of the former. The results of isotopic composition and water quality analysis show that the upper and lower aquifers are not directly connected and the hydraulic connection is not close. |
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