TCS岩石热导率测试与特征分析

TCS Rock Thermal Conductivity Test and Characteristic Analysis

岩石热导率是计算大地热流值的关键参数,对于地热资源量的估算以及地热资源有利区的优选有着重要的参考价值。利用TCS热导率扫描仪器对徐家围子地区四深1井不同地层深度20个岩石样品进行室内导热系数的测试,分析各个地层的岩心受地层深度、岩性、温度、压力、岩石结构等因素的影响。结果表明:地层岩石导热系数呈现随着深度的增而增加的趋势。对于同一地层,岩石的导热系数和深度成正比,深度越深,岩石导热系数越大;对于不同地层的岩体,结构越致密、颗粒越大、颗粒间接触面越大胶结作用越强、岩石孔隙度越小结构越稳定的岩体岩石热导率越大。

Rock thermal conductivity is a key parameter for calculating geothermal flow value,and it has important reference value for the estimation of geothermal resources and the optimization of favorable geothermal resource areas.In this article,TCS thermal conductivity scanning instrument was used to test indoor thermal conductivity of twenty rock samples with different strata depths in Wells 4 and 1 in Xujiaweizi area.The core of each stratum is analyzed by the factors such as stratum depth,lithology,temperature,pressure,and rock structure.The results show that the thermal conductivity of the formation rocks will increase with depth.For the same stratum,the thermal conductivity of the rock is proportional to the depth.The deeper the depth is,the greater the thermal conductivity of the rock will be.For rock masses in different strata,including the denser the structure,the larger the particles,the larger the interface between the particles,the stronger the cementation is,the greater it is.The smaller the porosity is,the more stable the rock thermal conductivity of the rock mass will be.