临汾井水温梯度实验及动态变化分析

Water Temperature Gradient Experiment and Dynamic Change Analysis of Linfen Well

以临汾流体观测井为例,对其水温梯度进行测试分析。结果表明,在深度约198~202 m、290~294 m、310~314 m处背景噪声小、水温梯度大,在200 m、320 m处均出现固体潮汐现象,在310~314 m处水温梯度段最大,320 m处为水温观测最佳部位;水温梯度在水面以下部分为正梯度,测试结果与井孔柱状图切合,为采用水温梯度精细测量反演井孔内部参数提供可靠数据;研究还得出,水温固体潮汐与井深、含水层关系无明显关联。

Taking Linfen fluid observation well as an example,the water temperature gradient is tested and analyzed.The results show that the background noise is low and the water temperature gradient is large at the depths of about 198-202m,290-294m and 310-314m.Solid tide phenomenon occurs at 200m and 320m.The water temperature gradient section is the largest at 310-314m and the best part for water temperature observation is 320m.The water temperature gradient below the water surface is a positive gradient,and the test results are consistent with the borehole histogram,which provides reliable data for fine measurement and inversion of borehole internal parameters by water temperature gradient.The study also shows that there is no obvious correlation between water temperature and solid tide and well depth and aquifer.