Hydrochemical characteristics and genetic mechanism of porous sandstone geothermal water in northern Jinan, Shandong, China

Yin, Huiyong; Zhou, Wei; Dong, Fangying; Liu, Yongming; Shi, Chuanhua; Meng, Miaomiao; Cheng, Wenju

doi:10.1007/s11356-024-32714-2

Cited by 2 publications

(1 citation statement)

References 59 publications

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“…The exploration of geothermal resources in the Shandong Province began in 1959. After decades of development, a variety of geothermal water chemical characteristics analysis, environmental isotope tracer application, geophysical exploration measurement, and geothermal system genetic model construction have been carried out in the eastern Shandong region, central Shandong Mountain hills, and northern Shandong plains. − By means of geophysical prospecting, geothermal drilling, and productivity testing, Zhang et al found out the geothermal geological characteristics such as thick and buried depth of carbonate thermal reservoirs in northwestern Jinan, and revealed the characteristics of thermal reservoirs, geothermal fields, and hydrochemical changes. Wang et al applied hydrochemistry, isotope, and other forms of analysis to systematically study the thermal storage characteristics of carbonate rocks and groundwater flow in northern Jinan, and gradually and systematically improved their conceptual model of geothermal fields.…”

Section: Introductionmentioning

confidence: 99%

Study on the Genetic Mechanism of Carbonate Rock Type Hot Mineral Water─A Case Study of Diaozhen, Jinan

Hao,

Tang,

et al. 2024

ACS Omega

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Geothermal resources are one of the most valuable resources in renewable energy because of their advantages of green environmental protection, stability, and reliability. Carbonate rock type geothermal reservoirs have great research significance. Carbonate rock type geothermal resources are abundant in the Shandong area. In this paper, we take the carbonate-type geothermal reservoir in the Diaozhen area of Jinan City as the research object, analyze the regional geothermal geological conditions, and identify the geological structure. Through physical logging exploration, hydrochemical analysis, isotope testing, and drilling exploration, we reveal the geothermal genesis mechanism and construct the genetic model of the carbonate geothermal system. The results show that Diaozhen area belongs to a low-temperature geothermal field and weak open karst thermal reservoir and that the reservoir is mainly Ordovician Majiagou group limestone. The thermal insulation caprock is the overlying Quaternary and Neogene strata with a cumulative thickness of 1376 m. The results of geophysical exploration wells and drilling data verify that the Mingshui fracture is seen around 1630−1645m, and the diorite intrusion is seen at 1610m. The Mingshui fracture connects the deep and shallow aquifers and is a geothermal fluid migration channel. The geothermal water in the Diaozhen area is mainly from the recharge of atmospheric precipitation, with a rich ion content and easy enrichment of trace elements. The regional thermal reservoir is mainly recharged by the deep circulation lateral runoff of Ordovician karst water. After long-distance deep circulation migration, groundwater continuously absorbs heat from the surrounding rock and is heated to geothermal raw water in the deep part. Deep geothermal water rises along the water-conducting fracture and mixes with shallow cold water to form shallow, low-temperature geothermal water.

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Section: Introductionmentioning

confidence: 99%

Study on the Genetic Mechanism of Carbonate Rock Type Hot Mineral Water─A Case Study of Diaozhen, Jinan

Hao,

Tang,

et al. 2024

ACS Omega

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Evolution of Karst Geothermal Hydrochemical Characteristics and Genesis Mechanism in Northern Jinan, Shandong, Eastern China

Wang,

Liu,

Zhou

et al. 2024

ACS Omega

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The study of geothermal water hydrochemical characteristics and solute transport evolution can provide a reliable hydrogeochemical basis for the development and protection of geothermal resources. Currently, there is a lack of systematic research on the hydrochemical evolution mechanism of geothermal fields in northern Jinan, which limits the development and use of geothermal fields. In this study, the hydrochemical properties of groundwater in northern Jinan were described by analyzing the hydrochemical characteristics of 16 geothermal water samples and 3 cold water samples. The results show that during the transformation from cold water in the south to geothermal water in the north, the contents of major ions all show an increasing trend and the hydrochemical characteristics show obvious zoning characteristics. The hydrochemical type evolved from HCO 3 −Ca to HCO 3 −Ca•Mg type, and then further evolved SO 4 −Ca and SO 4 −Ca•Na type water. Dissolution−precipitation of carbonate, sulfate, halite, and silicate minerals is one of the important processes that controls the chemical characteristics of geothermal water. The water source is mainly from the atmospheric precipitation in the Taiyi Mountain, with an altitude of 698.99−1464.91 m.s.a.l. The thermal reservoir temperature in the study area is estimated to be 55.62−98.16 °C. This paper proposes a conceptual model of the karst geothermal water flow system in northern Jinan, which provides a new idea for exploring the geothermal water genesis mechanism under similar geological conditions.

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Hydrochemical characteristics and genetic mechanism of porous sandstone geothermal water in northern Jinan, Shandong, China

Cited by 2 publications

References 59 publications

Study on the Genetic Mechanism of Carbonate Rock Type Hot Mineral Water─A Case Study of Diaozhen, Jinan

Study on the Genetic Mechanism of Carbonate Rock Type Hot Mineral Water─A Case Study of Diaozhen, Jinan

Evolution of Karst Geothermal Hydrochemical Characteristics and Genesis Mechanism in Northern Jinan, Shandong, Eastern China

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