地质学报2025，Vol.99Issue(5)：1755-1772,18.DOI:10.19762/j.cnki.dizhixuebao.2023085
海南岛岩石热物性特征及其对地温场的影响
Thermophysical characteristics of rocks in Hainan Island and its influence on the geothermal field
摘要
Abstract
The thermal properties of rocks are crucial for understanding the characteristics of geothermal fields and play an important role in studying geothermal fields and evaluating geothermal resources.In order to quantitatively understand the thermal properties of rocks and their impact on the geothermal field.This study systematically analyzes the thermophysical characteristics of rocks in Hainan Island through thermal property testing of outcrop samples.This provides new data and references for research in areas related to regional geothermal energy.Our results reveal that:① Significant differences exist in the thermal properties of the three rock types in Hainan Island.Metamorphic rocks have the highest thermal conductivity(3.16±1.41 W/(m·K)),followed by sedimentary rocks(2.53±0.80 W/(m·K)),and igneous rocks(2.40±0.74 W/(m·K)).Conversely,igneous rocks display the highest heat generation rate(2.68±1.68 μW/m3),followed by sedimentary rocks(1.90±0.92 μW/m3),and metamorphic rocks(1.10±0.95 μW/m3).② Porosity and thermal conductivity show a negative correlation,while density and thermal conductivity exhibit a positive correlation.Saturation correction of the rock samples significantly increases thermal conductivity values.Based on the specific situation of Hainan Island,we established an empirical formula for saturation correction applicable to the area.③ U and Th are the main heat-generating elements in rocks,both exhibiting a strong positive linear correlation with heat generation rate,while K shows a weaker correlation.④ The varying thermal conductivity and heat generation rates among different strata lead to uneven temperature distribution,influencing the accumulation of strata temperature.Furthermore,temperature field simulations demonstrate differences in results when considering and neglecting rock saturation.关键词
热导率/生热率/地温场/海南岛/放射性生热元素Key words
thermal conductivity/heat generation rate/geothermal field/Hainan Island/radioactive heat generation elements引用本文复制引用
李科甫,朱传庆,马钊,杨俊生,苏宏,邢书頔..海南岛岩石热物性特征及其对地温场的影响[J].地质学报,2025,99(5):1755-1772,18.基金项目
本文为国家重点研发计划课题(编号2021YFA0716003)资助的成果. （编号2021YFA0716003）
