沁水盆地大地热流与地温场特征  

Features of heat flow and the geothermal field of the Qinshui Basin

作　　者：孙占学[1] 张文[1] 胡宝群[1] 潘天有[1] 

机构地区：[1]东华理工学院土木与环境工程系,江西抚州344000

出　　处：《地球物理学报》2006年第1期130-134,共5页Chinese Journal of Geophysics

基　　金：国家重点基础研究发展规划项目(2002CB211704)资助.

摘　　要：分析了20口井的温度数据和39个岩石样品的热导率数据，计算了20个大地热流值．结果表明：沁水盆地具有偏高的大地热流背景，现今热流变化于44．8—101．8mW／m^2之间，平均62．7±15．2mW／m^2，现今地温梯度介于20．9—47．6℃／km之间，平均地温梯度28．2±10．3℃／km．热流的分布与本区上、下主煤层含气量的分布特征相似，在一定程度上反映了现代热流继承了煤层气生气期的古地热背景．Based on temperature logging data of 20 boreholes and thermal conductivities of 39 rock samples, 20 heat flow values are calculated for the Qinshui Basin, Shanxi Province, China, The results show that the heat flow values range from 44.8 mW/m^2 to 101.8mW/m^2 , with the average 62.7 ± 15.2 mW/m^2 , and that the present geothermal gradient varies from 20.9 ℃/km to 47.6 ℃/km with the mean value of 28.2 ± 10.3 ℃/kin in the basin. Similarities of the distribution of heat flow to that of coal-bed methane-bearing capacity of the upper and the lower coal beds in the area suggest that the present geothermal conditions reflect the characteristics of the fossil geothermal background during the formation period of coal-bed methane in the basin to some extent.

关 键 词：沁水盆地 地温梯度 热导率 大地热流 煤层气 

分 类 号：P314[天文地球—固体地球物理学]