简易测温曲线的近似稳态校正方法——以LYL井田为例

Approximate steady state correction of simple well temperature curve: with LYL mine field as an example

以LYL井田为例,通过收集邻区地温资料及气象资料,结合井田勘探阶段中的简易测温、近似稳态测温,确定井田内恒温带及中性点的参数。首先应用3个钻孔的近似稳态测温建立区内井温恢复曲线模型,之后利用已建立的模型对不同类型的简易测温钻孔对井底温度进行校正,最后通过恒温点、中性点、校正后的井底恢复温度得出简易测温校正曲线的拟合方程,根据方程对所有简易测温钻孔测温结果进行校正,计算出所有钻孔的煤层底板地温及地温梯度,从而为研究井田内地温分布规律提供第一手资料。

With LYL mine field as an example, through collecting the geothermal and meteorological data in adjacent area, in combination with simple temperature measurement and approximate steady state temperature measurement, the parameters were determined in the zone of constant temperature and at the neutral point in the mine field. Firstly approximate steady temperature measurement of 3 boreholes was applied to set up the model of well temperature recovery curves, then the model was used to conduct correction of bottom temperature of the boreholes of different types for simple temperature measurement, finally from the temperature at the constant temperature point and the neutral point as well the corrected recovery temperature at the borehole bottom, the fitting equation of the correction curve for simple temperature measurement was deduced, based on the equation, the temperature measurement results of all boreholes for simple temperature measurement were corrected, the temperature of coal seam floor and the geothermal gradient of all boreholes were calculated, thus providing the first-hand data for the study of the geothermal distribution in the mine field.