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采集45块岩心样品进行热导率测试,在分析库车前陆盆地的地热场的基础上,通过温度和孔隙度的校正,获得原地热导率和地层热导率柱。根据热传导定理和热阻法计算热流值,获得了库车前陆盆地的52个大地热流值数据及其分布特征。库车前陆盆地整体属于低热流冷盆,各构造单元的大地热流值为40～50mW/m2,低于我国其他大、中型沉积盆地。山前带的热流值相对较高,如依奇克里克、大宛齐、克拉等构造分区的热流值均在45mW/m2以上,是冷盆中的高热流带,也是天然气高产出带;中央坳陷部位的热流值较低(小于45mW/m2);前缘隆起部位热流值较高,如塔北的提尔根;南部的热流值东高西低,如牙哈等地区的热流值均高于45mW/m2,而西部的羊塔克、英买地区的热流值低于40mW/m2。新生代,印度板块与欧亚板块碰撞的远距离效应使塔里木盆地和天山之间发生了强烈的盆山耦合过程,盆地边缘岩石圈挠曲和快速沉降,决定了盆地现今大地热流的分布特征。图1表4参22
45 core samples were collected for thermal conductivity test. Based on the analysis of the geothermal field in the Kuqa foreland basin, the in-situ thermal conductivity and formation thermal conductivity columns were obtained through temperature and porosity correction. Based on the heat conduction theorem and the thermal resistance method, the heat flow values and the distribution characteristics of 52 heat values in the Kuqa foreland basin were obtained. As a whole, the Kuqa foreland basin belongs to a low-heat-flow cold basin. The geothermal flow value of each tectonic unit is 40-50 mW / m2, lower than other large and medium-sized sedimentary basins in China. The value of heat flow in the foreland belt is relatively high. For example, the heat flow values of the ecotones such as Ikekilik, Dawanchi and Karat are above 45mW / m2, which are the high heat flow belts in the cold basins and the high-yield natural gas belts (Less than 45mW / m2); the heat flow value of the uplift of the front margin is relatively high, such as Tier root in northern Tarim; the heat flow value in the south is high in the east and low in the west, such as the heat flux in the region of Yaha Values are higher than 45mW / m2, while in the western Yang Tucker, British bought the area heat flow value is lower than 40mW / m2. The long-range effect of the Cenozoic, Indian plate collision with the Eurasian plate caused a strong basin-mountain coupling process between the Tarim Basin and the Tianshan Mountains. Lithosphere deflection and rapid subsidence at the basin boundary determined the distribution characteristics of the current geothermal flow in the basin. Figure 1 Table 4 Reference 22