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在第四纪含水层中采用泥浆钻进时:对所揭露的含水层逐层测定静止水位,了解其水力关系,采取水样,分析其水质等的方法,是目前生产中急待要求解决的问题。我们曾对这些方法进行了试验,获得了一定的成效,现将其介绍如下:1.试验采用平行对比的方法。测定水位是在揭露第二含水层后,再钻进500—800毫米时进行的。对比孔相距2.5米。在同一深度用干钻下套管隔离含水层。第四纪冲积层厚度31米,两个含水层。第一个含水层
In the quaternary aquifer when the use of mud drilling: the exposed aquifer layers of static water level, to understand the hydraulic relationship, to take water samples, analysis of water quality, etc., is currently in urgent need of solution problem. We have tested these methods, and achieved some results, it is introduced as follows: 1. The experiment using parallel comparison method. The determination of the water level was carried out after the second aquifer was exposed, and then drilled 500-800 mm. Contrast hole distance 2.5 meters. Quench the aquifer with casing under dry drilling at the same depth. Quaternary alluvium thickness of 31 meters, two aquifers. The first aquifer